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User's Guide - Allied Telesis

1. AT S21 Uset s Guide To view received statistics per port 1 Select Individual Port Overview fromthe Receive Statistics Graph screen to display a list of ports 2 Select aport number for example Port 1 The screen displays a graph at the port level similar to Figure 4 5 Port l Sirie A Ficar Static Graph Bitene Stassheos Geach Berewed Good Frames 324744 aA Fiered Frames cidp s Brondrartr 7 513 E Muliraetr CE CEC Errare BI Alignment Errors INI Trine Frames Fragments 31 Lang Frames a Iran States Mi emo all jahiti Counters on ihe enzre egsiem Figure 4 5 Graph of a Port s Received Frames Note You may also view an individual port s receive statistics through the Port status and configuration port number menu To view received statistics per frame type Select aframetype e g Filtered Frames Forwarded Frames and so on from the switch level graph Figure 4 4 on page 4 5 that lists all frames Omega displays that frame s statistics according to ports similar to Figure 4 6 Return to main menu 4 7 Ethernet Statistics Filtered Framar Port l Sape A Pertz rak gi ie Fate 3TES EE EE Figure 4 6 Sample Graph of a Single Frame Type on All Ports Transmit Frames Menu Et
2. screen Post The screen displays up to four VLANs and expands to another page as the VLAN list grows VLANs East and West don t have ports assigned at this time Virtual LAN Configuration To delete or rename VLANs l Select Virtual LANs gt Virtual LAN definitions to display the list of VLANs similar to the following screen four VLANs are defined for illustration purposes Page 1 2 Select the VLAN name you want for example Upper Deck then a To delete the name from the list enter a single asterisk Q Torename the VLAN enter the new name You cannot delete Default VLAN but you can rename it If you delete a VLAN that has ports assigned to it the ports VLAN assignments revert to switch s Default VLAN Return to Main Menu 3 20 AT S21 User s Guide Adding Ports to Menu Virtual LANS gt Port to VLAN configuration the VLAN In this procedure you will assign Ports 1 12 to East 1 SelectPort to VLAN configuration fromthe Virtual LANs menu to get the list of ports and their VLANs similar to the screens in Figure 3 7 on page 3 18 2 Select the port number for example 1 to get the port s VLAN configuration screen that displays a list of defined VLANs 3 Select East 4 Returntothevirtual LAN Menu and repeat the procedure to assign Ports 2 through 12 to East The ports VLAN definition is now as follows East Eart East Eart Fart Fat Veral LAH Confgeaaterm Pon Weal LAH
3. Multiple collisions The same frames collide more than once they are expected to be far less than single collisions and may indicate a problem with the sending devices Late collisions Collisions that occur after 64 byte times of the frame had elapsed Excessive collisions A frequency of frame collisions detected by the port that causes the interface to fail to transmit frames Transmit timeouts Number of times the switch has stopped trying to transmit due to collisions To view transmitted statistics per port 1 Select Individual Port Overview from the Transmit Statistics Graph screen to display alist of ports 2 Select a port number to view a graph of that port s transmit statistics 4 9 Ethernet Statistics Interpreting the Graphs 4 10 The statistics graphs show the types of received and transmitted frames since the last time the counters or the switch were reset The counters and the graph dynamically increment as the switch processes frames over a period of time When the individual counters reach a maximum of 22 over 4 billion they reset to zero Because each counter resets independently your graph may become inaccurately skewed over time therefore you need to reset the counters to get a new baseline on frame statistics The graphs help you visually monitor the proportion of good and bad frames the switch has detected Good frames consist of filtered and forwarded br
4. a Theswitch obtains IP parameters from a BootP or DHCP server a Ata later time you can assign a switch name that s easy to remember using the System Administration menus described later in Chapter 3 in the section System Configuration on page 3 10 If you have BootP or DHCP the switch can obtain its IP parameters from the BootP or DHCP server during startups In this case you simply connect the switch to the network The function of the BootP or DHCP utility within an IP server is to provide IP parameters including an IP address to the switch Whenever you reset or power on and off the switch the switch transmits a request packet to the server every three seconds to obtain the required IP parameters The switch makes three request attempts If the requesting switch does not receive a BootP or DHCP response after the third request it will operate with a computed pseudo IP address based on the switch s MAC address If the switch receives a response from the BootP or DHCP server the switch extracts the IP address Subnet Mask or Gateway Router address and uses these parameters to configure itself until the next power on or reset Additionally if the BootP response packet specifies a filename and a TFTP host address then the switch sendsa TFTP get request to the specified host using the specified filename This initiates a TFTP download of operating software and allows you to maintain the downloaded software on your serve
5. Figure 3 9 Ports to VLAN East 5 Repeat the procedure to assign Ports 13 through 25 to West When adding ports to VLANs consider the following a If you are managing the switch from a remote station make sure that station and the management port Port 25 in this example belong to the same VLAN a Notethe port you are using for your network connection and make sure this port belongs to the same VLAN as your management port For example if Port 13 is your connection to the backbone Port 13 and Port 25 must belong to the same VLAN 3 21 Where to Go Next To delete a port from a VLAN or change a port s VLAN assignment 1 SelectPort VLAN configuration fromthe virtual LANs menu to display the port list with VLAN assignments similar to Figure 3 7 2 Select the port number you want to delete or change The screen displays the port s VLAN configuration and alist of available VLANs similar to Figure 3 9 3 Do one of the following Q To reassign the port to another VLAN select the new VLAN name from the list a To delete the port from a VLAN select Default VLAN from the list The screen displays the list of ports with the updated VLAN assignment Return to Main Menu Where to Go Next Proceed to Chapter 4 to operate and monitor and operate the switch 3 22 Chapter 4 Monitoring and Administration This chapter describes the procedures to monitor and operate your switch Monitoring topics a
6. IP address Null not configured Subnet mask Null not configured Gateway address Null not configured Domain Name Server Null not configured E Default Domain Name Null not configured Enter A for IP address or B for subnet mask Enter the letter corresponding to your choice if choices are preceded by numbers For example if your choices are Port 1 Room 1147 Port 2 Room 1148 EnterlforPort 1 Room 1147 2forPort 2 Room 1148 0r3for Port 3 Terminal Settings Data bits stop bits and parity Defaults of 8 data bits 1 stop bit and No parity are provided Transmission mode Full duplex echo the default means data travels in both directions Half duplex no echo means data travels in only one direction at a time Data rate baud rates The default is automatic baud rate detection You can also select from the following fixed baud rates 19200 bps 9600 bps recommended setting for fixed baud rate 4800 bps 2400 bps 1200 bps 600 bps 300 bps 150 bps 75 bps Automatic baud rate detection Oovocvovoococo co oO Return to Main Menu 3 16 AT S21 User s Guide Virtual LAN Configuration Se eS eg Menus Virtual LANs Figure 3 5 Virtual LANs Menu This switch supports port based VLANs only By default the switch has one VLAN all ports VLAN assignment showing as Default VLAN and one spanning tree In most situations users find the defaults acceptable and do
7. a Compensate automatically forthe failure removal or addition of any bridge in an active data path Achieve port changes in short time intervals which establishes a stable active topology quickly with a minimum of network disturbance Use a minimum amount of communications bandwidth to accomplish the operation of the STP Reconfigure the active topology in a manner which is transparent to stations transmitting and receiving data packets Manage the topology in a consistent and reproducible manner through the use of STP parameters AT S21 User s Guide Spanning Tree Protocol Parameters Several configuration parameters control the operation of the Spanning Tree Protocol Table A 1 describes the parameters and lists each parameter s default settings for the switch The port numbers include the twenty four 10Base T or 100Base TX ports Table A 1 Spanning Tree Protocol Parameters Parameter and Description Default Bridge Group Address N A Unique MAC group address recognized by all bridges in the network Bridge Identifier 32768 Identifier for each bridge consisting of two bridge priority parts a 16 bit bridge priority and a 48 bit network adapter address Ports are numbered in absolute numbers from 1 nfor a multi port switch including optional expansion ports if any The network adapter address is the same address asthe first port of the bridge Port Priority 128 Port Cost 100 for 10 Mbps ports
8. 7 Menu Navigation Using A Web Browser on page 2 8 Resetting the Switch on page 2 12 About Optional Configurations on page 2 13 Menu Tree on page 2 14 2 1 Connecting a Terminal and Starting a Local Session Connecting a Terminal and Starting a Local Session This procedure applies if Q Youare managing the switch locally a You are managing the switch in a TCP IP environment and you are configuring IP parameters for the first time 1 Connectaterminal or PC directly to the switch s RS232 port and configure the terminal or emulation program as follows VT100 emulation 8 data bits 1 stop bit No parity 9600 bps 2 Press lt Return gt The main Omega menu displays Allied Telesyn AT 8124XL Ethernet Switch 1 0 Main Menu Port status and configuration Ethernet statistics Administration System configuration Virtual LANs Bridging MAC Address Table Quit Figure 2 1 Main Menu As a default the software does not require a password for access You may later configure a password described in Chapter 3 in the section System Configuration on page 3 10 The switch is now operational at the default settings listed in Table 2 1 2 2 AT S21 User s Guide Switch Default Settings Setting Switch To set your switch to the factory defaults do the following Defaults eo RELIG memi d This operation deletes existing switch configurations 1 Attach a terminal to the RS232 port located on t
9. Domain name service support DNS Local Management AT S21 User s Guide The switch s software is factory installed and ready to use You can access the management menus Omega Local by directly connecting a terminal or a PC to the switch s RS232 port on the front panel Figure 1 1 and using your terminal emulator program Figure 1 1 Switch With Terminal or PC Setting up the terminal emulator program is described later in Chapter 2 the section on Connecting a Terminal and Starting a Local Session on page 2 2 Remote Management in Non TCP IP Networks In non TCP IP environments you communicate with the switch from a remote location Omega Remote by entering its pre configured MAC address located below the RS232 port on the front panel Figure 1 1 At alater time you can assign an easy to remember switch name through the System Administration menus described later in Chapter 3 in the section System Configuration on page 3 10 Remote Management In TCP IP Networks Remote Management In TCP IP Networks TCP IP With BootP or DHCP In a TCP IP network the switch requires a set of IP parameters such as a unique IP address and subnet mask for communication The switch obtains its IP parameters in one of the following ways a You assign the IP parameters through Omega s System configuration gt IP Parameters menu described later in Chapter 2 the section on Menu Navigation Using the Terminal Interface on page 2 5
10. The spanning tree algorithm calculates and 10 for 100 Mbps ports ensures that an active topology generates minimal path costs A 3 Spanning Tree Operation Spanning Tree Operation A 4 When spanning tree is enabled for the first time or when the network topology changes due to a failure the addition or removal of a component the spanning tree algorithm automatically sets up the active topology of the current network Communication between bridges Periodically all devices running STP on a network transmit packets to each other through the Bridge Group Address which all bridges share When a bridge receives a packet sent to the Bridge Group Address the bridge s STP processes the packet The packet is ignored by application software and other LAN segments Bridges communicate between each other in order to determine the root bridge Selecting a root bridge and designated bridges During communication between bridges one bridge is determined to have the lowest bridge identifier This bridge becomes the root bridge After the root bridge has been selected each LAN segment looks for the bridge that has the lowest cost relative to the root bridge These bridges become designated bridges Selecting designated ports Each designated bridge selects a designated port This port is responsible for forwarding packets to the root bridge Handling duplicate paths When the active topology of the network is dete
11. all links may have yet adapted to the change therefore loops may result Return to Main Menu Configuring the Root Port AT S21 User s Guide Menu Bridging Port spanning tree configuration gt Enable spanning tree for all ports gt Disable spanning tree for all ports To enable a specific ports spanning tree select gt Enable spanning tree for all ports then choosethe port The root port is chosen by a bridge asthat bridge s preferred path to the root bridge To prevent data loops there must only be one root port per bridge Root Priority All of the ports are default root priority 128 the range is 0 255 When the designated root port is disabled or the cable connection breaks the STP algorithm reconfigures an alternate path to the LAN by identifying the port with the next lowest priority number Port Cost The default value is 100 and the range is 1 65535 The spanning tree algorithm uses the cost parameter in combination with the priorityto decide which bridgesprovide the lowest cost path to the root bridge for that LAN Higher port costs are associated with ports of lower bandwidth and vice versa For example 100 isthe cost fora 10 Mbps port 10 for a 100 Mbps port and 1 for a 1 Gbps port Once the required parameters are configured bridges can make a determination on the best single path to a destination within a given VLAN A formula determines the amount of time it takes forthe topology to reconfi
12. also requires a valid IP address For details refer to Chapter 2 Getting Started DEC VT100 Terminal Configuration AT S21 User s Guide If you are using the DEC VT100 or ANSI the default terminal configuration When directed to You must Select an option Highlight the option by pressing the Up 7 or Down J arrow key then press lt Return gt or Type the first character of the option you want at the prompt and then press lt Return gt If two or more options have matching initial characters type the initial character enough times until the option you want is highlighted then press lt Return gt Enter information for example IP address Type the correct IP address and press lt Return gt Return to the previous screen Select the option or Press lt Esc gt vii Document Conventions viii Generic Dumb Terminal Configuration Enabling an Omega Option If you are using the generic dumb terminal configuration When directed You must To select an option Type the first character of the option you want and then press Return If two or more options have matching initial characters type enough characters for Omega to distinguish your choice from the other options then press Return To guide you the characters you must type are in uppercase For example Mirroring configuration MAC Address Table If optionson alist are prece
13. by storing the information in a forwarding table see also MAC Address Table in Chapter 4 page 4 11 Q Forwards the packet to the destination s network segment if the source isfrom a different network segment or discardsthe packet if the source and destination addresses are on the same segment because all stations on the segment have already received the packet Q Agesoutthe addresses deletes the information from the table if the address is undetected by any port within a user defined or a default elapsed time 300 seconds a Updates the MAC address table automatically as you add remove or relocate devices on the network a Determines the quickest single route to a destination according to switch ports or VLANs when you enable Spanning Tree Q Updatesother bridges with topology information by periodically sending bridge protocol data units BPDUs Most users generally keep the default spanning tree parameters to allow bridges to automatically reconfigure themselves if the topology changes or if bridges become disabled If you want a brief overview of the Spanning Tree Protocol STP before proceeding go to Appendix A Spanning Tree Concepts Spanning Tree Configuration Configurin Menu Bridging gt spanning tree parameters S S Spanning Tree This option allows you to change the following spanning tree Parameters parameters The default values are Bridge Priority 32768 Max Age Time 20 Hello Time 2 Forward
14. 17 features 1 2 software downloads Omega commands 4 18 4 19 password 4 17 TFTP 4 17 XModem 4 20 spanning tree protocol aging 3 8 Spanning tree protocol STP concepts A 1 A 3 configuration 3 7 3 9 Spanning Tree Protocol STP 1 2 static MAC address 4 15 4 16 statistics ethernet 4 5 resetting counters 5 3 store and forward default 3 5 STP concepts A 1 operation A 4 subnet mask 3 2 switch location physical 3 3 name 3 11 naming 3 11 port default 3 4 resetting 2 12 software default settings 2 3 software default settings 2 3 switch name change 3 11 Switching mode 3 5 System configuration IP parameters 3 2 system configuration Index 4 options 3 10 system name 3 11 table forwarding 4 11 TCP IP with BootP or DHCP 1 4 TCP IP network management in 1 4 technical support 5 5 terminal 2 2 configuration options 3 15 emulation vii 3 16 generic configuration viii generic 3 15 VT100 3 15 terminal configuration settings 3 16 terminal interface menu navigation 2 5 2 6 quitting 2 6 TFTP 1 2 time hello 3 8 timeout value 3 13 timeout 3 12 3 13 transmission mode 3 5 trivial file transfer protocol TFTP to download software 4 17 uplink optional port 3 6 variables entering ix virtual local area networks VLANs about local area network virtual 3 17 adding ports 3 21 advantages 3 18 default 3 17 3 20 defining 3 19 deleting or renaming 3 20 deleting ports
15. 49 35 17 164 KE5 ok ETT 0 O00 seconds Eng 148 25 17 164 206 cx ETT O O00 seconda Fag 249 35 17 163 EL ox ETT UCOU seconds Fag 149 25 177 164 NI ok ETT O COO seconds Fig 149 25 17 164 M19 cic ETT O 000 erconde Finished Figure 4 1 Activity Monitor 4 2 AT S21 User s Guide Connection to a Remote Switch Menu Administration gt Connect to a remote system This option allows you to use a switch to connect to and manage another switch from Omega This feature is only available if you are connected to the switch for a local software management session using the RS232 port 1 Select Administration gt Connect to a remote system 2 Specify the switch by one of the following methods a By its user assigned name enclosed in single quotes in the format name a By its IP address in the format x x x x a By its Ethernet or MAC address in the format XXXXXX XXXXXX The switch s MAC address is printed above the switch s RS232 management port on the front panel Once the information is validated and the connection to the remote switch is opened you immediately get that remote switch s Omega main menu You may then use Omega to configure the remote switch and run diagnostics The only option not available on the remote switch is Connect to a remote system from the Administration menu The same is true if you used Telnet 3 Select Quit from the main menu when you are done 7 A A O O Note 7 It is i
16. C address 4 11 change switch name 3 11 change the aging time 3 11 commands Omega 4 18 community strings SNMP 3 3 configuration IP parameters 2 7 Omega 3 12 port number 3 4 System IP parameters 3 2 terminal settings 3 16 terminal viii web browser proxies 2 8 configure timeout value 3 13 connection 2 2 console connection see terminal connection conventions used in this guide vi ix cost port 3 9 counters resetting statistics 5 3 cut through for 100 Mbps operation 3 5 DEC VT100 terminal emulation vii default aging time 3 11 Index 1 Index auto negotiate port 3 5 backpressure 3 14 port configuration 3 4 port enabled 3 5 settings switch software 2 3 store and forward 3 5 STP values 3 8 switch software settings 2 3 VLAN 3 17 3 20 Default Domain Name 3 2 define VLANs 3 19 delay forwarding 3 8 delete a password 3 13 VLAN port 3 22 VLAN 3 20 DHCP server 3 2 diagnostics running 5 2 disable port 3 5 documentation set list x domain name default 3 2 Domain Name Server 3 2 download password 3 2 4 17 4 19 downloading software 4 17 4 20 downloading software XModem transfer 4 20 duplex full or half 3 5 dynamic host configuration protocol DHCP 1 2 1 4 emulation terminal vii 2 2 enable or disable the port 3 5 entering variables ix ethernet statistics 4 5 5 3 features software 1 2 fixed port names 3 6 forwarding delay 3 8 forw
17. Downloads Using XModem Menu Administration XModem software update to to Download this system Software Omega supports software downloads to the switch using XModem It is assumed that you have the required setup to support this type of file transfer This menu is not available through the web browser because the Xmodem transfer occurs through the switch s RS232 management port Use the following procedure to set up your switch for an XModem transfer 1 Launch Omega s terminal interface 2 SelectAdministration XModem software update to this systemto display the following Ready to receive software upgrade via XModem Warning During software update Management activity is disabled Do Xmodem update now Yes or No 3 Enter Yes and wait for the following message The system host is now ready for download Please start your XModem transfer 4 Initiate the download from your XModem host The Xmodem host displays the download in progress similar to the following message Stop NEN ET EN Sending ATS21 Retries 0 4 20 Chapter 5 Diagnostics This chapter describes the following topics a a a a Running Diagnostics on page 5 2 Resetting Statistics Counters on page 5 3 Resetting the Switch on page 5 4 Getting Help on page 5 5 Also see the AT 8118 AT 8118XL AT 8124XL and AT 8126XL Fast Ethernet Switches Installation Guide that explains in
18. E TIT Iuuen V Document CONVENTIONS erisnimi i disadvan deena tec rec ecd c vc crc vi Web Browserlnterface uucreta ettet tdeo sein cca n dao dnd M o ret o red dedo vi DEC VT100 Terminal Configuration ww Vii Generic Dumb Terminal Configuration Viii Enabling an Omega Option viii re ix User Supplied Variables arit icc iii deste debe btt ix Where to Find Related Guides X Chapter 1 nune irinl m d corer ect oa ed len ee aed eee 1 1 Software Features 1 2 Local Management s 1 3 Remote Management in Non TCP IP Networks a 1 3 Remote Management In TCP IP Networks 1 4 TCP IP With BootP or DHCP 14 Management Through a Web BrOWSer s sesseennennnntnnntnntint ttt ttt ttt tttttttttnn titan tttttt ttt ttt toas to titt ttt ttt ttttttttttttt 1 5 Use cum 1 5 Chapter 2 Getting Started oorr Ls uM t ee a D MARE erm UR Edu CLIE M di 2 1 Connecting a Terminal and Starting a Local Session 2 2 Switch Default Settings e 2 3 Setting Switch Defaults Menu Navigation Using the Terminal Interface Displaying Submenus s 2 5 Enabling or Bisabling an O pEOTL 2t t
19. Graphs MAC Address Table Multicast Address Static MAC Addresses Switch s MAC Address Location Software Downloads sss Conditions for Network Downloads Usitig TE TP utto teint ES Downloading Software to One Switch essent ttt ttt ttt tt tttttttt ttti totos tios tot tob itat ttttttttttttttst Downloading Software to All Switches eet ttt ttt tttttttttt ttti ttti otto toti ttt tttttttt tetti araara eaa Using XModem to Download Software Chapter 5 Diagnostics AAEE E E EE E oth Mec onto AM EE Ete A fict mE M SM 5 1 Running Diagnostics Resetting Statistics Counters n Resetting the Switch a 5 4 Getting HeD ra aa E ea A A ae oa Ua A E AA 5 5 Appendix A Spannindg Tree Concepts osinean aa athl dope a tru dep end a aa a etie Spanning Tree Protocol Features A Spanning Tree Protocol Parameters a Sparnining Tree Operation ssec etras irte piratae e ER eb eek edu Preface This guide documents the procedures to use Omega the management software model AT S21 that is pre installed in AT 8118 AT 8118XL AT 8124XL and AT 8126XL Fast Ethernet switches from Allied Telesyn Purpose of This Guide This guide is written for network administrators who are responsible for configuring the management software and managing the switches Network administrators should be familiar with Ethernet swit
20. Management Software AT S21 User sGuide For usewith AT 8118 AT 8118XL AT 8124XL and AT 8126XL produds MV Allied Telesyn PN 613 10727 00Rev C Simply Connecting the World Copyright 1998 1999 Allied Telesyn International Corp 960 Stewart Drive Suite B Sunnyvale CA 94086 USA All rights reserved No part of this publication may be reproduced without prior written permission from Allied Telesyn International Corp CentreCom is a registered trademark of Allied Telesyn International Corp Netscape Navigator is a registered trademark of Netscape Communications Corporation All other product names company names logos or other designations mentioned herein are trademarks or registered trademarks of their respective owners Allied Telesyn International Corp reserves the right to make changes in specifications and other information contained in this document without prior written notice The information provided herein is subject to change without notice In no event shall Allied Telesyn International Corp be liable for any incidental special indirect or consequential damages whatsoever including but not limited to lost profits arising out of or related to this manual or the information contained herein even if Allied Telesyn International Corp has been advised of known or should have known the possibility of such damages Table of Contents Lr o e EET V Purpose of This Guide m How O
21. Mem ME Port amp Link State Cinkre Fort State Enabled M Reser Sanai Ceaph d Disable paskan fas port wa Ap pegia Full hyrs d Hat digii T do Bore and fore d Chroi for JOUMEPS aperamin i any Poet suene Da z Fi om e aao Figure 3 1 Port Configuration Menu The switch s port configurations are set to the following defaults Q Status Ports enabled a Link Offline until there is a valid physical link to a device Q Transmit Mode Auto negotiating for speed and duplex transmission Q Switching Mode Store and forward a Port Name No name assigned 3 4 Description of Options AT S21 Uset s Guide Enable or disable the port Ports are enabled as a default In case of anetwork problem you may want to disable a port to prevent problem packets from being forwarded Once the problem is fixed you may enable the port again to resume normal operation You can also disable an unused port to secure it from unauthorized connections Transmission mode The 10Base T 100Base TX ports auto negotiate as a default while FX ports are fixed at 100 Mbps Depending upon what the connected device supports you may configure each switch port as follows Auto negotiating The port determines the connected device s configuration 10 Mbps or 100 Mbps speed full or half duplex and adapts automatically This setting provides flexibility so that you need not reconfigure the switch if you change the type of
22. Statistics Graph similar to Figure 4 2 The graph showsthe types of framesthe switch has received over a period since the switch slast reset or since someone has last set the counters to zero See Table 4 1 for a definition of received frames Table 4 1 Received Ethernet Frames Frame Type Description Received Good Frames Total number of frames received by the switch since the last reset Filtered Frames Frames received by the switch but not forwarded because the destination is within the same LAN segment therefore the frame was already seen by all nodes on the segment Broadcasts Frames received by the switch destined for ALL nodes on the network excluding multicast frames Multicasts Frames received by the switch destined for multiple but specific addresses excluding broadcast frames CRC Errors Frames with a cyclic redundancy check CRC error but with the proper length 64 1518 bytes Alignment Errors Frames with a non integral number of bytes that is frame length in bits are not evenly divisible by 8 but with the proper length 64 1518 bytes Undersized Frames Frames less than the minimum specified by IEEE 802 3 64 bytes including the CRC also called runts Fragments Total undersized frames frames with alignment errors and frames with FCS errors CRC errors Long Frames Frames exceeding the maximum specified by IEEE 802 3 1518 bytes including the CRC
23. XXX The switch s MAC address is printed above the switch s RS232 management port on the front panel The screen immediately turns on the Activity Monitor screen and displays the information asthe destination switch requests and then receives the software Repeat this procedure to download software to another switch on the network Downloading Software to All Switches AT S21 User s Guide Menu Administration Broadcast updated software to all systems Plan a software broadcast update during times when your network is not busy 1 Select System administration Broadcast updated Software to all systems The switch announcesthe availability of the software to all switches belonging to the same series in turn the switches that need the upgrade respond by sending back a request message The screen immediately turnson the Activity Monitor screen and displaysthe information as switches on the network request and then receive the software a m Note You cannot undo this command once executed You may go to menus without interrupting the software download If you have many switches requesting the download not all of them may receive it especially if the network is busy Repeat the procedure to ensure all switches receive the software upgrade Note Switches with different download passwords will not receive the software download 4 19 Software
24. a simple yet practical way of splitting a 24 port switch into two virtual switches by configuring two VLANs In these procedures you will Q Configure a 24 port switch into two VLANs East and West Q Assign ports 1 12 to East and ports 13 25 to West The RS232 management port is Port 25 To view the ports default VLAN configuration select Virtual LANs gt Port to VLAN configuration The screen shows all ports belonging to Default VLAN See Figure 3 7 for an example of the list partially shown g 8124 Por Vera LAH Configure Put Vota LAH Site Default YLAH Default LAD Default LAN Default VL AT Default LAH Defi LAL Default WLAN Figure 3 7 Switch Ports Default VLAN Configuration AT S21 Uset s Guide Defining the Menu Virtual LANs VLANs To define VLANs In this procedure you will configure two VLANs East and West l Select Virtual LANs from the main menu to display the Virtual LAN Menu 2 Select Virtual LAN definitions to display the VLAN Definition Menu As this screen shows there is one VLAN on the list Default VLAN Hip HAKITA re Figure 3 8 VLAN Definition Menu 3 SelectAdd new table entry to display the next screen 4 Enter the name East in the type in field 5 Repeat the procedure from the beginning to define another VLAN West 6 Go tothe VLAN Definitions Menu to display the VLANs you just defined Your VLAN list may now look like the following
25. a fresh start Otherwise the counters and the graph not only still reflect information associated with the error condition the counters continue to increment from the wrong baseline Q Aseach frame type reaches the maximum of 22 over 4 billion the statistics for that frame type resets to zero Once this happens the counters and graph become inaccurately skewed To reset switch system counters 1 SelectEthernet Statistics from the main menu to display the Receive Statistics graph 2 SelectZero all statistics on the entire system Both Receive and Transmit counters and graphs are reset to zero 5 3 Resetting the Switch Resetting the Switch 5 4 Menu Administration gt Reset and restart the system You reset the switch Q Asafirst attempt to fix an error condition for example the FAULT LED ison Q To download software through a modem a To reset all statistics counters to zero To reset the switch Reset the switch in one of three ways SelectAdministration Reset and restart the system Press RESET on the switch s front panel or Disconnect the power cord then reconnect it The switch first undergoes a Power on Self Test POST process that takes only a few moments then the switch becomes operational again Getting Help AT S21 User s Guide Contact Allied Telesyn s technical support at the company s website at www alliedtelesyn com Be prepared to provide the followin
26. a name to the switch or its ports Port names can be associated with the user assigned to the port or an office location The need to use symbolic names becomes more apparent as you add more switches and therefore multiply the number of ports you must manage Q Enable security features Although passwords are not required to access the management menus with the Omega Options menu you can prevent disable either Omega Local or Omega Remote create password protection and enable timeout A timeout value automatically terminates a management session after a given period when someone leaves a current session unattended 2 13 Menu Tree Menu Tree Port number Receive Statistics Graph Enable this port Disable partition this port Auto negotiate Full duplex Half duplex Store and forward Cut through 100 Mbps operations The following Omega menu tree is provided for your easy reference Receive Statistics Graph all ports Individual port overview Zero all statistics counters on the entire system Transmitted frames statistics Individual port overview Zero all statistics counters on the entire system Individual Port Overview Zero all statistics counters on the entire system RMON Statistics Zero all statistics counters on entire system Zero all statistics counters on entire system Update Software in another system Broadcast updated Softw
27. and AT 8126XL Switches Quick Install Guide that is shipped with the switch or in the AT 8118 AT 8118XL AT 8124XL and AT 8126XL Fast Ethernet Switches Installation Guide that you can download from Allied Telesyn s website at www alliedtelesyn com Software Features Software Features The AT S21 software provides the following management features a Factory installed and ready to use a Support for management through a web browser Q User configuration for per port packet switching store and forward or for 100 Mbps only fragment free cut through a Auto negotiation for full or half duplex and 10 Mbps or 100 Mbps speed Q Bridging support including Spanning Tree Protocol STP Q System configuration management and diagnostics using Allied Telesyn s interface Omega accessible locally via an RS232 asynchronous terminal remotely via Telnet or a web browser Q Software upgrades using Xmodem via the RS232 port or TFTP to download software to other AT 8118 AT 8118XL AT 8124XL and AT 8126XL switches on the network Q Password override Q SNMP agent that allows switch management from the administrator s network management station Q Support for TCP IP s BootP parameters and Dynamic Host Configuration Protocol DHCP Q Support for port based Virtual LANs VLANs Q Support for DEC VT100 ANSI the default or generic dumb terminal configuration Q Internet Control Message Protocol ICMP Echo PING support a
28. arameters essent ttti tttttttt ttti ttis ttattot tiat tttttttt ttti nt ranan 3 8 Configuring the Root Port System COMTI ULATION e Naming thie swItehia issus oe eR te Lo AL oer ce a Ma A alae icc eal Sat ak cece had Cea eal ita NE Changing the Aging Time Configuring Omega Configuring a Password Configuring a Timeout Value 3 Backpressure au 3 14 Terminal Configuratio e S 3 15 VT100 Compatible or ANSI Generic Dumb Terminal m Terminal n ree 3 16 Virtual LAN Cornfig Cretiorn Ru 3 17 Defining the VLANs et Adding Ports to the VEAN asi rite et erat e tec iicet ob E i Re detecte edet bte dedi 3 21 Where to Go Next iis om lom tutudum s Loro c ad A Del LL D Reena de Lost DUI AD EDO ci 3 22 Chapter 4 Monitoring and Administration esaet a an t rm RR dd 4 1 Activity Monitor s s Connection to a Remote Switch is Connectivity Verification PIng suscitat dente cedente tr adn vcr e deed ru c A dere reco Etliermet StatistiGScotesnin obstinate trt an t Re tare dissi E A E A ENET E EET I t M GR Navigating the Statistics Graphs Menus Received StaliSti6S E irte A mtd daraus ed rtr ertt as turus edd p e OR a e rut E uet cg bt Eo NI TRANSMIS 2 dla con er n Elbe rd o Ta dde Rd un i e AE cet dut AER RR e ecu eo ERR eu Urn Interpreting the
29. arding table seealso MAC address fragment free see cut through Full duplex 3 5 Index 2 gateway address 3 2 generic terminal viii 3 15 3 16 getting help 5 5 half duplex mode backpressure 3 14 hello time 3 8 in non TCP IP networks 1 3 IP address 3 2 parameters configuration 2 7 parameters system 3 2 label location MAC address 4 16 learning bridge 3 7 local management 1 3 local Omega 3 12 location physical switch 3 3 MAC address aging default 2 4 forwarding table 4 11 label location 4 16 multicast address 4 13 4 14 remote connection for non IP 2 7 static 4 15 4 16 stored in memory capacity 4 11 switch s 3 2 table aging 3 7 3 11 table displaying addresses in 4 12 management 1 3 in TCP IP networks 1 4 local 1 3 2 2 port 3 6 remote 1 3 web browser 1 5 manager address 3 2 memory capacity 4 11 menu option selection 2 5 port configuration 3 4 menu navigation terminal interface 2 5 web browser 2 8 menu tree Omega 2 14 2 15 mode cut through for 100 Mbps operation 3 5 store and forward 3 5 switching 3 5 transmission 3 5 monitor activity 4 2 multicast address 4 13 4 14 name a port 3 6 name the switch 3 11 naming switch 3 11 non IP remote connection 2 7 non TCP IP 1 3 Omega 1 3 commands 4 18 fixed port names 3 6 local 2 2 3 12 menu tree 2 14 options 3 12 password to access 3 12 3 13 quitting 2 6 quitting web browser 2 11
30. are no routers between the two switches If you have assigned unique names you may use these in place of MAC or IP addresses 2 7 Menu Navigation Using A Web Browser Menu Navigation Using A Web Browser 2 8 This guide is primarily based on the web browser interface To use the web browser interface make sure your switch has been assigned a unique IP address or a switch name see previous section This section shows you how to Q Configure your web browser to access the switch s Omega menus a Use the browser s navigational tools in combination with Omega s commands to configure the switch The examples are based on Netscape s Navigator you can use other popular browsers Noite When directed by this guide to select something that means you Click on it l Ifyour PC with the browser is on the same side of a firewall as the switch configure your browser s network options not to use any proxies otherwise skip to Step 2 Consult your web browser s documentation on how to configure the switch s IP address not to use proxies 2 Enterthe switch s IP address or name in the locator field Switch s IP address Wy Hsircape Bak Waru Ee db wee ps gazami n Heg gl faim phe 04535 17 hal s Herel I Wisi arch Pexin 52 tam Figure 2 3 Entering the Switch s IP Address AT S21 User s G
31. are to all systems XModem software update Remote system connection Ping a remote system Activity monitor Reset and restart the System MAC address Aging Time Omega Options IP parameters Terminal configuration Backpressure enabled gt No backpressure Figure 2 7 Omega Menu Tree 1 of 2 AT S21 User s Guide Show all MAC addresses By port MAC addresses All static MAC addresses Per port static MAC addresses Multicast addresses Clear static MAC table Spanning tree parameters Virtual LAN definitions Bridge Priority Port to VLAN configuration Max Age Time Forwarding Delay Port spanning tree configuration Enable spanning tree for all ports Enable spanning tree by port Disable spanning tree for all ports Disable spanning tree by port Figure 2 7 Omega Menu Tree 2 of 2 Where to Go Next Proceed to Chapter 3 to configure the switch and to Chapter 4 to monitor and administer the switch Chapter 3 Configuration This chapter describes the following procedures to optimize your switch configurations a a a a m m IP Parameters on page 3 2 Port Configuration on page 3 4 Spanning Tree Configuration on page 3 7 System Configuration on page 3 10 Terminal Configuration on page 3 15 Virtual LAN Configuration on page 3 17 The proc
32. at the highlighted area to insert a type in field and enter a text string Type in field System Configuration Menu System name MAC Address Aging Time Omega Options IP parameters Terminal Configuration Backpressure enabled gt No backpressure Return to Main Menu Q To delete the existing information enter one or more space characters and press lt Return gt a If you press Return before entering any characters the previous configuration value remains unchanged The new or changed switch name displays at the top of the screen a deleted name no longer appears Quitting the To quit Omega select Quit from the main menu Terminal I If you do not quit Omega from a local session future Telnet sessions meer to the switch will be blocked If you are currently in a Telnet session you must additionally disconnect Telnet after quitting Omega Otherwise future Telnet sessions to the switch will be blocked You may configure a timeout value so that the switch automatically disconnects Telnet sessions after a period of inactivity See Chapter 3 section on Configuring a Timeout Value on page 3 13 for the procedures AT S21 User s Guide Configuring IP Parameters Skip this section if you have a non TCP IP network or if you have TCP IP but use a BootP or DHCP server to provide IP parameters This procedure providesthe minimum IP configurations you need to enter so that the switch can be part of you
33. ch has learned and stored in its volatile memory The switch can store up to 16K addresses The information on the table dynamically changes as packets bearing source addresses appear on any port Thetable flows into a second page as more addresses are detected by all ports Thetable ages out MAC addresses after 300 seconds 5 minutes asa default This means if a MAC address listed on the table does not reappear on any port within the aging time that address is deleted If you reset the switch or remove power the table clears but immediately gets updated as soon as the switch is operational and the ports start to detect MAC addresses in incoming packets Static MAC addresses are not affected by aging time loss of power or switch resets This topic is described later in this section 4 11 MAC Address Table To display the MAC address table 1 SelectMAC Address Table fromthe main menu 2 Select Show all MAC addresses to get a screen similar to Figure 4 9 BLAC Addresses Page MAC Adis Table MAT Address o Pert MAC Address Pon MOT AACAGE 6 MOC SECS 6 MPA AHA g MFA Az3 88 DODUEd AdOE4B 4 GORA Adi of HOMEY AdITGB S MOF AdTDAD g DF Ad10B3 g MPA A4 378 Figure 4 9 Sample MAC Address Table To display the MAC address table sorted by port 1 SelectMAC Address Table gt By port MAC addresses to display a list of ports 2 Select a port number from the list to display a table similar to Figure 4 10 Fait I Sa
34. ches Ethernet and Fast Ethernet technology bridging and the spanning tree protocol How This Guide is Organized This guide is composed of the following sections Chapter 1 Introduction describes the features and functions of the AT S21 software Chapter 2 Getting Started describes the procedures for navigating the Omega menus and entering initial configurations Chapter 3 Configuration describes the procedures for modifying switch settings to suit your network environment Chapter 4 Monitoring and Administration describes the procedures for viewing status information and performing administrative tasks on the switch Document Conventions Chapter 5 Diagnostics describes the testing procedures to implement in case the switch malfunctions Appendix A Spanning Tree Concepts briefly describes the Spanning Tree Protocol STP as implemented by Allied Telesyn on the switches Index at the end of this guide is according to subject matter Document Conventions Web Browser Interface The Omega menus are available from the following user interfaces Q Graphical user interface via a web browser Q Text based interface via a DEC VT100 terminal configuration Q Text based interface via a generic terminal configuration This guide is written entirely based on the switch s web browser interface The web browser interface works in TCP IP networks and requires a web browser such as Netscape s Navigator The switch
35. ded by numbers 1 2 3 etc type the number corresponding to your choice at the prompt then press Return To enter information for example IP address Type the correct IP address at the prompt and press Return To return to the previous screen Press Return after making an entry In text based interfaces Omega denotes an enabled option by preceding it with a gt For example the following screen shows a port that is enabled Enable this port Disable partition this port If your terminal configuration is DEC VT100 enabled configurations also appears darker Menus User Supplied Variables AT S21 User s Guide If you enable another option Omega moves the gt to the new option For example Enable this port gt Disable partition this port Menus and submenus are represented in courier type In this guide menu hierarchies are separated by a gt Menu System configuration Menu System configuration gt IP parameters Variables are information you must supply such as IP addresses MAC addresses or port numbers Variables are in Italics and enclosed in angle brackets lt gt For example to configure a specific port Select Port status and configuration lt PortNumber gt where lt PortNumber gt can be 1 2 and so on Note icons Note Notes provide additional information Warning icons Warning may result
36. detail the different ways to diagnose error conditions by interpreting the LEDs on the switch s front and back panels Running Diagnostics Running Diagnostics 5 2 Menu Administration gt Diagnostics Select Diagnostics from the Administration menu to display the Diagnostics screen Figure 5 1 shows asample Diagnostics screen Aked Iik AT BIZAXT HAC Addrezi GUAODC BDDSOD Ha Applies Ha BAT AT 321 Ethemet Swirl Solar Verdon D 320725 Eung 5 manes 57 second Dagnestic Hemis Flak EE OM Gase EAM Gu Smal Interface Cic d lad Fara ta labs biaa Figure 5 1 The Diagnostics Screen The Diagnostics menu allows you to run a limited set of diagnostic tests on the switch There are only two results Good or Failed You also see the following information The switch model and version number The switch s MAC address The software model and version number D D D UD Thetype of MDA denoted by the screen as appliqu if installed Q Thetimethe switch has been up and running since the last reset AT S21 User s Guide Resetting Statistics Counters Menu Ethernet statistics gt Zero all statistics on the entire system You reset statistics counters because Q Thecounters no longer reflect the current information For example disabling a port to fix a problem does not reset its counters After the error clears and you manually re enable the port you may want its statistics to accumulate from
37. device you are connecting to the port If you disable Auto negotiate by selecting Full duplex Or Half duplex you can also select 10 Mbps or100 Mbps Full duplex You may use this setting if the connected device supports full duplex that is transmit and receive communications happen simultaneously Half duplex You may use this setting if the connected device supports half duplex that is transmit and receive communications do not happen simultaneously Switching mode Ports are set to store and forward as a default With the available switching options you can optimize performance and enable error checking Store and forward With thissetting the port waits to receive an entire packet before forwarding the packet to its destination the port forwards only those packets without errors The port automatically goes to the store and forward mode automatically when datais exchanged between 10Base T and 100Base TX ports Cut through for 100 Mbps operation This is available only at 100 Mbps transmission speed The port starts to forward the packet once the packet has exceeded the smallest size 64 bytes therefore filtering fragment frames or runts This method provides low latency for forwarding frames and also provides some network error protection 3 5 Port Configuration Port Naming Fixed Port Names 3 6 ig locate ram Lr Es ateen RE cumin To name a port l SelectPort Status and configurat
38. edures in this chapter are the same for Omega s terminal interface and the web browser interface IP Parameters IP Parameters Menu System configuration gt IP parameters This option applies to TCP IP networks only As described in Chapter 2 the section on Configuring IP Parameters on page 2 7 the switch requires a minimum set of IP parameters in order to be part of a TCP IP network Other IP parameters have default values or do not require entries If you have a BootP or DHCP server those servers provide IP configurations to the switch as long as you configure the servers with the switch s MAC address Additional configurations on the switch are not necessary An IP address This address is required Subnet mask This address is required Gateway address This is the router s IP address This address is required if you need to send packets from one IP network to another via this router Domain Name Server This is the DNS IP address This address is required if you are using this type of service Default Domain Name This is the domain name to which the switch belongs This isrecommended if you are using thistype of service Manager address You may enter IP addresses of up to four network management servers that will receive SNMP traps This parameter is optional Download password The default password is ATS21 displayed as a series of asterisks Software downloads require this password to send software fro
39. een with recently entered configurations select Refresh Not all screens have Refresh To disconnect from the switch through the browser you must quit your browser While you are in the browser and you link to other sites you are still logged in to Omega You may return to the Omega web pages anytime as long as you do not quit the browser 2 11 Resetting the Switch Resetting the Switch You may occasionally need to reset the switch There are three ways to do so a Usetheswitch s RESET button on the front panel to perform a hardware reset on the switch Pressthis button with a pointed object such as a ballpoint pen a Use Omega s Reset and restart option This option enables you to perform a software reset from a local terminal or from a remote location via Telnet or the web browser Q Unplug the switch s power cord from the power source and plug it back in to recycle power and reset the switch 2 12 AT S21 User s Guide About Optional Configurations Other than assigning the switch s IP address for a TCP IP network you do not need to change the default settings in the management software On the other hand network administrators may prefer to use the configurable options for their individualized switch performance For example Q Namethe switch and its ports An IP or MAC address is enough to communicate with the switch on the network however names are descriptive and easy to remember You can configure
40. er s Mac address from Step 1 asthe multicast address 4 Enteroneor more port numbers that are to receive multicast packets from this server Use one of the following formats lto enter a single port 3 8 22 to enter multiple ports all to enter all ports 4 13 MAC Addtess Table 4 14 Any port may have more than one multicast address associated with it The number of multicast addresses you can configure is limited to ten 10 per switch Omega confirms a successful add with the following message MAC adress added O00 Berna me To change ports for multicasts To change the ports for a multicast address for example if you want to increase the number of ports from 5 to 6 start all over by following the procedure to configure a multicast address and add all six ports To delete a multicast address 1 SelectMAC Address Table gt Multicast addresses to display the menu in Figure 4 11 on page 4 13 2 Enterthe MAC address you want to delete in the Delete MAC address field After you delete a multicast address wait and the display updates with the changed information AT S21 Uset s Guide Static MAC Menu MAC Address Table Add i i SPA The static MAC table also includes any configured multicast addresses Entering static MAC addresses ensures certain devices access to the switch s ports because aging time power failures or switch resets do not affect the static MAC table To enter a static addres
41. for 100MBPS operation Port name Figure 2 5 Sample Omega Menus Displaying Submenus Selecting an Option Entering or Modifying Information Quitting Omega AT S21 User s Guide Underlined text on the display indicates it is a selectable item that when selected displays another menu or execute a command For example in Figure 2 5 clicking on a specific port number Port 6 from the port list displays a menu specific to Port 6 Menu hierarchies are represented as follows System configuration System name When directed to select the above command first you select System configuration from the main menu to display a submenu then select System name on the submenu Enabled options are underlined and darker than the other options For example on Figure 2 5 Port 6 is set to Auto negotiate You can change its transmission mode by clicking on either Full duplex or Half duplex You enter a text string in a type in field similar to Figure 2 6 vi oU COMM ann Port name Figure 2 6 Type In Field Q Toenterinformation typethetext string in thefield and select Enter a To change existing information select the displayed text string typethe new information to modify and select Enter Q To delete information select the displayed text string press lt Backspace gt and then select Enter a To retain current configuration without accepting changes select Reset instead of Enter a To update the scr
42. from 3 22 VLAN communication 3 17 VT100 compatible terminal 3 15 web browser configuration proxies 2 8 interface menu navigation 2 8 2 11 management 1 5 quitting Omega 2 11 quitting 2 6 web based Omega 3 12 website technical support 5 5 XModem transfer to download software 4 20 AT S21 User s Guide Index 5
43. g information a m Switch model number Serial number Software version A description of the problem Contact telephone number Contact name 5 5 Appendix A Spanning Tree Concepts This appendix provides a brief explanation of the Spanning Tree Algorithm as implemented by Allied Telesyn on the switches For detailed information on the operation of the Spanning Tree Algorithm consult Section 4 of IEEE Std 802 1D ISO IEC 10038 1993 The AT 8118 AT 8118XL AT 8124XL and AT 8126XL switches which run the AT S21 software implement the IEEE 802 1D Spanning Tree Protocol STP The STP provides a network with robustness and allows network administrators to easily change their network topology Its implementation reduces complex network topologies networks with multiple paths between source and destination nodes to a single active topology This technique guarantees that loops do not occur between source and destination nodes of the network Loops are eliminated by placing some of the redundant ports in a blocking state in which they do not forward packets but continue to execute the protocol If the network topology changes for example by the failure removal or addition of an active network node a blocked port may be included in the new active topology and begin forwarding frames A 1 Spanning Tree Protocol Features Spanning Tree Protocol Features A 2 The switches implement the following STP features
44. gure depending upon the spanning tree values you use Refer to the IEEE specification for details Return to Main Menu 3 9 System Configuration System Configuration Menu System configuration af Huhsrkprerture De Figure 3 3 System Configuration Menu The System configuration options are set to the following defaults a No name is assigned to the system switch MAC address aging time is 300 seconds L Accessto Omega viaa local console through a remote system and through the Word Wide Web is enabled No password is configured The timeout value is five minutes No IP parameters are configured Terminal configuration is VT100 compatible or ANSI D D ct BO B5D Backpressure is disabled 3 10 Naming the Switch Changing the Aging Time AT S21 User s Guide To name the switch l Select System configuration gt System name 2 Entera unique name of up to 20 characters in the type in field The switch s name must be unique within the subnet The name you entered appears at the top of the screen and will display on every Omega screen from now on In subsequent Omega sessions you may use the switch name instead of its MAC or IP address to connect to the switch from aremote location To delete or change the switch s name l Select System configuration gt System Name 2 Do one of the following Q To delete the name enter a space character a To change the name enter a un
45. he front panel of the switch and begin the terminal emulation program Press Reset located on the right side of the switch s front panel Immediately pressany key when youseeHit any key to run diagnostics or to reload system software Amenu then displays 4 Select D from the menu The following warning message displays WARNING This will erase all current configuration data Continue Y N 5 Select v The system displays A11 configuration data has been reset to factory default values Press B to boot the switch software 2 3 Switch Default Settings Table 2 1 Default Settings Settings Default IP Address 0 0 0 0 Subnet Mask 0 0 0 0 Gateway Address 0 0 0 0 Get community string Public Set community string Private Trap community string Public Forwarding Method Store and forward Spanning Tree Protocol Disabled Telnet Access Enabled System Name None Password Omega No password assigned Timeout value 5 minutes Download Password ATS21 Transmission mode per port Auto negotiating MAC Address Table s Active Aging Time 300 seconds High Port Speed Auto negotiating Domain Name None VLAN name Default VLAN AT S21 User s Guide Menu Navigation Using the Terminal Interface Displaying Submenus Enabling or Disabling an Option Enabled options As a default Omega s terminal interface is conf
46. hernet Statistics gt Transmit Statistics To view transmit statistics Select Transmit statistics to display the Transmit Statistics Graph similar to Figure 4 7 Tread Stabs Graph Trance Serbs raph Total Gacd Traces 219 Erud ad Dixi assi nimi Lee supe oknie Tos Ties Ak Ikea por secre Mio Zero all ratier counters oa t Figure 4 7 Sample Graph of Transmitted Frames The graph showsthe types of framesthe switch has transmitted over a period since the switch s last reset or since someone has set the counters to zero 4 8 AT S21 User s Guide Expect transmit errorsto be very small The switch may receive a numberof bad frames but the switch drops those and sends only good frames See Table 4 2 for a definition of transmit frames Table 4 2 Transmit Ethernet Frames Frame Type Description Total good transmits Total frames transmitted by the switch without errors since the last reset Broadcasts Frames forwarded by the switch destined for ALL nodes on the network excluding multicast frames Multicasts Frames forwarded by the switch destined for multiple but specific addresses excluding broadcast frames Transmits deferred Frames whose transmission has been deferred by the switch due to lack of resources they are not stored in the buffer and eventually dropped Single collision Frames from two ports that collided because they were sent at the same time considered normal
47. igured to use a DEC VT100 or ANSI terminal or an equivalent terminal emulator program At startup Omega highlights the first item on the main menu Figure 2 1 on page 2 2 To select a menu option 1 Press the up T down J left or right arrow key to highlight an option 2 Press lt Return gt Omega displays the enabled option in bold and precedes it with a gt symbol For example to view information about a port 1 SelectPort status and configuration from the main menu to display a list of ports 2 Select a port number for example Port 11 by pressing the up arrow key to highlight it and then press Return to display its configuration information Port Configuration Menu Port 11 Link State Offline Port State Enabled Please select an option Enable this port Disable partition this port Auto negotiate Full duplex Half duplex Store and forward Cut through for 100MBPS operation Port name Return to Port Status Menu Figure 2 2 Sample Port Configuration Menu Terminal Interface 2 5 Menu Navigation Using the Terminal Interface 2 6 Entering or Omega precedes type in fields with the gt symbol Modifying To configure the switch s name Information 1 Select System configuration gt System name to display the System Configuration Menu The first option System name is highlighted 2 Configure the switch name at the prompt as follows a Press Return
48. in bodily injury Caution icons may result in equipment damage or loss of data Warnings inform you that performing or omitting a specific action S caution Cautions inform you that performing or omitting a specific action Where to Find Related Guides Where to Find Related Guides Allied Telesyn wants our customers to be well informed by providing the most up to date and most easily accessible way to find our guides and other technical information Visit our website at www alliedtelesyn com and download the following guide AT S21 Software Management User s Guide 613 10727 00 AT 8118 AT 8118XL AT 8124XL and AT 8126XL Installation Guide 613 10726 00 The following guides are shipped with their respective products AT 8118 AT 8118XL AT 8124XL and AT 8126XL Quick Install Guide 613 10729 00 AT 8118 AT 8118XL AT 8124XL and AT 8126XL Translated Safety Information Booklet 613 10728 00 AT A10 and AT A11 Quick Install Guide 613 10742 00 Chapter 1 Introduction This chapter describes Q The features of AT S21 Management Software for the AT 8118 AT 8118XL AT 8124XL and AT 8126XL Fast Ethernet switches a An overview of the networking environments for you to optimize AT S21 s management features Make sure the switch is installed in the network and operating normally Follow the procedures in the AT 8118 AT 8118XL AT 8124XL
49. ing delay 15 Bridge Priority The number can be from 0 to 65 535 with 0 being the highest priority The number consists of a 2 byte bridge priority number and a6 byte MAC address Bridges use this number to determine the root bridge for a loop free implementation If bridges happen to have equal priority values the bridge with the numerically lowest MAC address becomes the root bridge When the root bridge malfunctions the bridge with the next priority number the next lowest MAC address automatically takes over as root bridge Max Age Time The aging time can be from 6 40 seconds with 20 seconds as a default All bridges in a bridged LAN use this aging time to test the age of stored configuration messages called bridge protocol data units BPDUs For example if you use the default 20 all bridges delete current configuration messages after 20 seconds q Note Aging time for BPDUsis different from aging time in the MAC address table Hello Time Hello time can be from 1 10 seconds with 2 seconds as the default Bridges use this parameter to determine the time interval between generating and sending configuration messages Forwarding Delay The default is 15 seconds The time indicates the waiting period before a bridge changes to anew state for example becomes the new root bridge after the topology changes If the bridge transitions too soon not
50. ionto display alistof ports 2 Selecta port number from thelist to displaythe Port Status Menu 3 Enteraname of up to 20 charactersin the Port name field 4 Return tothe Port Status Menu to see the new name displayed on the port list Figure 3 2 Port List Sample Mode A Ormai Ezsbisd Half duplex Mer Exsbird amp utc negotiate Hizr Exsbled Aito pepothate Mer Eeabled Anto negotiate Hoe Eeakled Aut ne patois Omega reserves port numbers for the management port and any optional uplinks These ports are numerically incremented from the highest port number For example on a 24 port switch Port 25 isthe management port and it assumes the user configured switch name if any A 16 port switch with two uplinks has the following ports Port 17 management port Port 18 uplink port A D D D UD Port 19 uplink port B Return to Main Menu Ports 1 through 16 station ports AT S21 User s Guide Spanning Tree Configuration Menu Bridging The default Spanning Tree Protocol STP parameters are adequate for most networks Changing them without prior experience and understanding of how STP works might have a negative effect on your network The spanning tree algorithm prevents data loops when end stations in extended networks send and receive packets through bridges The switch operates as a bridge to Ethernet ports As a bridge the switch a Learns source MAC addresses of incoming packets
51. ique name of up to 20 characters The default aging time is 300 seconds If the switch detects a packet with anew source MAC address the switch stores the MAC address in its address table This means the switch has learned about the device that sent packets to the switch The MAC address table continues to be updated as new MAC addresses are detected If a certain MAC address no longer appears on any port after 300 seconds the switch deletes that address from the table To change the aging time l Select System configuration MAC Address Aging Time to highlight the current value 2 Enteranew value in the type in field 3 11 System Configuration Configuring Menu System configuration Omega Options Omega wi Ernte Omega Enaldecd i Ws Eoi Cura fi Wrbhuard Orarga Enabled Figure 3 4 Omega Configuration Screen Omega default options consist of the following Password No password is initially required to access Omega Timeout The default is 5 minutes A timeout value is one way to protect the switch from unauthorized use in case you forget to exit Omega and then leave the switch unattended If you configure a timeout value Omega clocks the elapsed time between the last time any key was pressed during an Omega session If the elapsed time exceeds the timeout value Omega automatically quits Local Omega The default is enabled Local Omega means you can access the management menus by connecting a terminal or PC to
52. m one switch to other switches in the network provided they belong to the same product series and the download password isthe samethroughoutthe switches You may keep the default or change it A switch can only accept software downloads from other switches of the same product series if their download passwords are the same AT S21 User s Guide The software automatically searches for this password during downloads without requiring you to enter it This password is different from the optional system password you configure to protect the switch from unauthorized use See the related procedure Software Downloads in Chapter 4 SNMP Community strings The following default community strings are provided Get public Set private Trap public You have the option to keep or change them Location You may enter a text string to indicate the physical location of the switch For example enter First Floor Lab This parameter is optional and is used for SNMP management Contact You may enter a text string to indicate the name phone number and other useful information to help identify the person responsible for the switch This parameter is optional and is used for SNMP management Note u For more details about SNMP management refer to your SNMP management documentation Return to Main Menu 3 3 Port Configuration Port Configuration Menu Port status and configuration gt lt port number gt i Haiecape jhen
53. mportant that you select Quit after the Omega session Otherwise you may block other sessions or software downloads via the network to the remote switch Refer also to Chapter 3 Configuring Omega for information on using a timeout value 4 3 Connectivity Verification Ping Connectivity Verification Ping Menu Administration gt Ping a remote system The ping command enables you to test if an end system can be reached by sending it an Internet control message protocol ICMP echo request If the system is connected to the network it sends a reply to the requesting system 1 Select Administration gt Ping a remote systemto see the following display Flemm enter ration 2 ping The system may be vderabed by name rame br IP address 128 2 3 4 or by Ethemet address UOOFA 123458 Emer Peset Please enter states te peng Figure 4 2 Ping Menu 2 Specify the system with one of the following methods a By its user assigned name enclosed in single quotes in the format name a Byits IP address in the format x x x x a By its Ethernet or MAC address in the format XXXXXX XXXXXX The switch s MAC address is printed above the switch s RS232 management port on the front panel The activity monitor reports the results of the ping command shown in Figure 4 3 as an example Fa 145355 17 167 419 tii cut Finishes d Pinging Heat 145 35 17 164 delay 1 00 Fg 145 35 17 154 87 ok ETT 0000
54. n page 3 2 If you have TFTP you can use TFTP commandsto download an image file from the switch that has the upgraded software TFTP platforms vary Some have graphical user interfaces while others require you to enter commands Consult your TFTP documentation for the commands When using the TFTP get if you are on the destination switch or put if you are on the source switch command use the following variables Image file name Get the latest from Allied Telesyn s website at www alliedtelesyn com IP address This is the IP address of the switch that is the source or destination of the image file Download password The default download password is ATS21 in uppercase File type The file type is octet Software Downloads 4 18 Downloading Software to One Switch Menu Administration gt Update software in another system Follow this procedure in order to Q Download software to another switch on the network without physically being at the destination switch Q Ensurethat all the switches on the network you intend to upgrade will be upgraded since you will be manually downloading software one switch at a time l SelectAdministration Update software in another system 2 Specify the system with one of the following methods a Byitsuser assigned name enclosed in single quotes in the format name a ByitsIP address in the format X X X x a ByitsEthernet or MAC address in the format XXXXXX XXX
55. not require further configuration however your network may require assigning end stations into logical groupings regardless of their physical location You can group your end stations logically through VLANs Information exchange is confined within the members of a given VLAN A VLAN constitutes one broadcast domain therefore broadcast packets from an end station only go to other stations within the same VLAN VLANs cannot communicate with each other through the switch they require a router to do this Figure 3 6 Router Figure 3 6 VLAN Example Virtual LAN Configuration 3 18 The number of configurable VLANs depends on the switch s port count including the RS232 management port and any optional uplink ports The AT 8118 and AT 8118XL each have 16 base ports with none one or two optional uplink ports for a total count of 16 17 or 18 ports The AT 8124XL has 24 ports The AT 8126XL has 24 base ports wih none one or two optional uplink ports for a total count of 24 25 or 26 ports Advantages of Using VLANs Q You have the flexibility of grouping workstations logically or functionally regardless of their physical location on the network Q Youcan change VLAN memberships anytime by software configuration without moving the workstations physically or change group memberships by simply moving a cable from one port to another The examples used in the procedures that follow will illustrate
56. nt Telnet sessions and software downloads to the switch will be blocked To delete or change a timeout value 1 Select System configuration gt Omega Options gt Timeout Do one of the following a To delete the current value enter 0 Q To change the value enter another value from 0 to 65 535 If you enter 0 you must always quit after a management session in order not to block subsequent remote sessions and software downloads to the switch Return to Main Menu 3 13 System Configuration 3 14 Backpressure Menu System configuration gt No backpressure Backpressure is disabled as a default Note AAA Although listed in the software this option isnot available and should remain disabled In half duplex mode the switch implements the backpressure methodology when its input buffer is running out of resources for example outbound packets are traversing a single uplink port When backpressure is enabled the switch simulates a collision when its input buffers are filled up so that sending devices will defer transmissions These sending devices will retry transmissions according to the Ethernet back off algorithm Once switch resources are available again it stops sending the collision signals and devices may freely transmit again Terminal Configuration VT100 Compatible or ANSI Generic Dumb Terminal AT S21 User s Guide Menu System c
57. oadcasts and multicasts Bad frames are runts and long frames or those with CRC or alignment errors It is normal to have a number of error packets now and then If the network seems to be slow this graph is one of the areas you can check to help isolate the problem To usethe graphs as monitoring and diagnostics tools l Display any of the Ethernet statistics graphs by selecting Ethernet statistics from the main menu 2 Observethe counters and the graph 3 Identify and then fix the problem Note that the problem may be external to the switch and the statistics may just indicate an error condition somewhere on the network you need to fix You may also need additional monitoring devices specifically designed for that purpose such as a network analyzer to identify the problem 4 Selectzero all statistics counters on the entire system from any of the Statistics screens after fixing the problem You need to reset counters to get a new baseline That is because the counters and graphs still depict the information during the error condition and will continue to increment from there until you reset the counters Return to main menu AT S21 User s Guide MAC Address Table Menu MAC Address Table Error MAC addres We LY peli amp ranr ack resses deploy and cosigoration Figure 4 8 MAC Address Menu The MAC address table also referred to as the forwarding table is a snapshot of source MAC addresses that the swit
58. onfiguration Terminal Configuration Omega supports two types of terminal configuration options a VT100 compatible or ANSI the default a Generic dumb terminal Forthis type of terminal the enabled options are preceded by a and also appear brighter To use the menus in a VT100 compatible type of terminal configuration Press Return to enable the option that is already highlighted Press the up T down J left or right 25 arrow keys to highlight the option you want and then press Return Enter the first character of the option you want In some cases where options have the same initial letters enter enough letters until the software can differentiate your choice from the other options Press lt Esc gt to go to the previous menu For this type of terminal the enabled options are preceded by a gt To use the menus in a generic type of terminal configuration Enter the initial character of the option you want then press Return In some cases where options have the same initial character enter enough characters until the software can differentiate your choice from the other options To guide you the menus display the required characters in uppercase Press lt Return gt to go to the previous menu without selecting or entering anything 3 15 Terminal Configuration Enter the letter corresponding to your choice if choices are preceded by letters For example if your choices are
59. r AT S21 User s Guide Management Through a Web Browser Those familiar with web browsers such as Netscape Navigator amp can access Omega menus by entering the switch s IP address or a unique name in the URL field With a web browser you enjoy the following advantages QO QO Use of your favorite browser s point and click graphical interface and navigational tools to totally bypass Omega s hierarchical terminal interface Bookmarking capabilities so you store switches IP addresses or go directly to most frequently used Omega menus instead of navigating through a hierarchy of menus Browser based security to prevent unauthorized access Details are described in Chapter 2 the section on Menu Navigation Using A Web Browser on page 2 8 Where to Go Next Proceed to Chapter 2 Getting Started for information on m O Connecting a terminal for local management Entering IP parameters to manage the switch in a TCP IP network Using a web browser to manage the switch Using the standard Omega terminal interface to manage the switch Chapter 2 Getting Started This chapter describes ways to start Omega after you have installed the switch on the network This chapter includes the following information a Connecting a Terminal and Starting a Local Session on page 2 2 Switch Default Settings on page 2 3 Menu Navigation Using the Terminal Interface on page 2 5 Configuring IP Parameters on page 2
60. r TCP IP network Assigning a unique IP address to the switch provides an advantage the switch uses the same IP parameters despite resets and power cycles 1 Select System configuration gt IP Parameters fromthe main menu 2 Select IP address press Return to insert a type in field and enter a unique IP address for the switch 3 Select Subnet mask and enter the switch s subnet mask 4 Select Gateway address and enter the address if you are sending packets to another IP network The gateway address isthe routerthat can forward packets to the other IP networks Once the switch has an IP address you may initiate Omega sessions to it via Telnet or a web browser Note that you can only have one Telnet session operating at any one time The session can be either inbound or outbound If you have an inbound session to Omega you do not have the option of starting a new session outbound connection Therefore if you are already using Telnet the Omega option Connect to a remote systemwill not be available described in detail in Chapter 4 Monitoring and Administration In addition alocal RS232 connection blocks a Telnet session and vice versa For more on IP parameter configuration go to Chapter 3 and referto the section IP Parameters on page 3 2 Note am For non IP environments you can use MAC addresses to connect to remote Allied Telesyn switches as long as there
61. re as follows Q Activity Monitor on page 4 2 Q Connection to a Remote Switch on page 4 3 Q Connectivity Verification Ping on page 4 4 Q Ethernet Statistics on page 4 5 Administration topics are as follows MAC Address Table on page 4 11 Q Software Downloads on page 4 17 4 1 Activity Monitor Activity Monitor Menu Administration gt Activity Monitor The Activity Monitor option is useful in troubleshooting or in monitoring switch activity if any The activity monitor automatically activates when you download software to switches on the network System administration gt Broadcast updated software to all systems Figure 4 1 shows another switch activity displayed by the monitor that is the results of ping commands issued from the switch Acair monior Pipay Hoot 148 25 17 164 delay 1 000 Pag 249 35 17 164 WT ok ETT 0 000 seconda Fag 149 35 17 164 KZ ok ETT D 000 secondz Fmg 149 35 I1 09 ok ATT 0000 teconde Ping 149 35 17 ok RTT 0000 seconds Ping 149 35 ITL 5 ok RTT 0 QOO seconds Ping 149 35 17 104 at ok ETT QOO secondr Pag 140 25171647 ok ETT 0 QOO seconde Pu 149 35 17 1 64 we ok ETT 0 QOO seconds Fag 148 35 17 164 3 ok ETT DODO secede Fag 149 35 17 164 MEO cie ETT 0000 seconde Pre 149 35 17 162 MET olx ETTO Of gncondz Ping 149 35 17 L 02 ok ETT 0 000 seconds Ping 149 35 17 164 WE3 ok ETT Q 00 seconds Pg 149 25 17 164 AH ok ETIO OH seconds Fiag 1
62. remote 3 12 web based 3 12 Omega configuring 3 12 3 14 optional uplink port 3 6 options Omega 3 12 terminal 3 15 organization this guide v parameters bridging 3 8 IP 2 7 IP system configuration 3 2 STP A 3 password delete 3 13 to access Omega 3 12 3 13 to download software 4 17 4 19 password 3 2 port auto negotiating 3 5 AT S21 User s Guide default switch configuration 3 4 enable or disable 3 5 fixed port names 3 6 management port 3 6 naming 3 6 number 3 4 root 3 9 status 3 4 uplink 3 6 Port Configuration Menu 3 4 port cost 3 9 port status and configuration port number 3 4 Port Status Menu 3 6 ports adding VLAN 3 21 deleting VLAN 3 22 POST 5 4 power on self test 5 4 priority bridge 3 8 root 3 9 protocol BPDU 3 7 DHCP 1 2 1 4 STP 1 2 3 7 TFTP 4 17 proxies for web browser configuration 2 8 purpose this guide v quitting Omega terminal interface 2 6 web browser 2 11 remote management 1 3 remote Omega 3 12 rename VLAN 3 20 RESET button 5 4 reset the switch ways to 2 12 resetting statistics counters 5 3 resetting switch system counters 5 3 resetting the switch 5 4 root port 3 9 root priority 3 9 router for VLAN communication 3 17 Index 3 Index running diagnostics 5 2 settings terminal configuration 3 16 setup 2 2 SNMP physical switch location 3 3 SNMP Community strings 3 3 software default settings 2 3 downloading 4
63. rmined all packets between any two nodes in the network use only one path Where a duplicate path exists the non designated port is put into a blocking state Remapping network topology If there is a change in the network topology due to a failure removal or addition of any active components the active topology also changes This may trigger a change in the state of some blocked ports The blocked ports do not forward packets immediately They first pass through two states listening and learning to verify that they may begin forwarding A port remains in each of these two states for the time defined by the Forwarding Delay parameter This algorithm ensuresthat no temporary loops exist in the active network topology and is a safeguard against packet forwarding during a network topology change period Index Numerics A 100 Mbps operation see cut through access 1 3 activity monitor 4 2 adding VLAN ports 3 21 address gateway 3 2 manager 3 2 multicast 4 13 see also MAC address 2 7 aging change time 3 11 default 3 10 MAC address table 3 7 3 11 spanning tree parameter 3 8 ANSI terminal seeDEC VT100 terminal emulation audience this guide v auto negotiating port 3 5 backpressure 3 14 baud rates terminal emulation 3 16 bookmarking use of 2 9 BootP 1 4 3 2 bridge learning 3 7 bridge priority 3 8 bridge protocol data unit BPDU 3 7 3 8 bridging 3 7 spanning tree parameters 3 8 capacity MA
64. s per port l Prepare alist of your devices MAC addresses and their port assignments 2 Select MAC Address Table gt Per port static MAC addresses to display a similar screen no MAC addresses have been configured Port 12 MAC Adimi MAC Address Table HAT Addrece MAC Addeen POAC Addrere MAC Addr Add HMAC adda Eur Pesa Teli MAC address Erer Fese Figure 4 12 Adding Static MAC Addresses to the Ports 3 Entera MAC address in the Add MAC address field Use following format XXXXXX XXXXXX After adding a static MAC address wait and the display updates with the changed information if necessary return to the main menu and select MAC Address Table gt All static MAC addresses to display the updated table The static MAC address appears on the Static MAC table You can configure only one static MAC address per port 4 15 MAC Address Table To view the static MAC address table SelectMAC Address Table gt All static MAC addresses The display is for viewing purposes only To clear the static MAC address table 1 SelectMAC Address Table gt Clear static MAC table 2 Select yes to confirm or No to cancel After clearing a static MAC address wait and the display updates with the changed information if necessary return to the main menu andselectMAC Address Table gt All MAC addresses to display the updated table Switch s MAC If you want to know your Allied Telesyn switch s MAC address Add Loca
65. seconds Fag 142 35 17 164 MZ ok ETT 0 000 pitada Feu 135 35 17 154 43 ox ETT U O0 ee da Figure 4 3 Ping Results Return to main menu 4 4 AT S21 User s Guide Ethernet Statistics Menu Ethernet Statistics You can view statistics on received and transmitted frames in two Ways Q Atthe switch level where you see the total of each frame type on all ports taken together or a Atthe port level further broken down into Per port all frame types Perframe type all ports taken together Statistics are a tool for diagnosing a problem and isolating itto a specific port You can view graphsthat show information on the switch as a whole From this total picture you have the option to view statistics on a per frame type or a per port basis Navigating the Displaying various statistics graphs does not require you to go Statistics Graphs through a hierarchy of menus Within a particular graph you can select to view statistics on a frame type a port orthe entire system To illustrate refer to Figure 4 4 it is the first graph Omega displays when you select Ethernet Statistics from the main menu Menus ete Slatted Graph Bense Sanies rap 157 45 OUUU up Y LE E Figure 4 4 Graph of Received Frames Switch Level 4 5 Ethernet Statistics Received Statistics To view received statistics at the switch level Select Ethernet Statistics fromthe main menu to display the Receive
66. shows additional examples on how the Omega menus work Click on Port 6 from the list of ports to display Port 6 s Configuration Menu 44 Netscape Main Menu Fie Edit View Go Bookmarks Options Directory Window Help amp o fy amp ENEMIES o Forwerd Home Reload veges Open d Stop Link Status Mode e Disabled Auto negotiate e Disabled Auto negotiate Disabled Auto negotiate e Disabled Auto negotiate B E BB e Disabled Auto negotiate nline 10 Enabled Half duplex e Disabled Auto negotiate O O O 90 0O 0 0 0 PP Disabled Auto negotiate Disabled Auto negotiate weg Pom E Mo co aliai Auto negotiate Disabl e Disabl ce Auto negotiate Disabled Auto negotiate ce Disabled Auto negotiate 2 Disabled Auto negotiate IEEE oO 90 0 0 0 0 0 ce BIEEIBIBIBIE Disabled Auto negotiate ip eee 1 4 acu i gt 2 10 P Location pez 8381 7 164 What s New What s Cool Destinations Net Search People Software Port 6 Link State Online Port State Enabled Receive Statistics Graph vV Enable this port Disable partition this port V Auto negotiate Full duplex Half duplex JV Store and forward Cut through
67. te A WAC Ad rerces MAC Address Table MAC Adder MA Adda MAC Adder MAC Addn DOODUC AACASB PoC S38CD DOES Az3192 IE AAO DFA A4TLAD DOF AST DAD DOOr4 Ad 1208 IDEA A4137H Figure 4 10 MAC Address Table Sorted by Port The table flows into a second page asthe port detects more MAC addresses 4 12 AT S21 User s Guide Multicast Address Menu MAC Address Table Multicast addresses A broadcast is a transmission that sends copies of a packet to all end stations on the network A multicast is a special form of broadcast where copies of a packet are delivered to a specific group of end stations A multicast address is a destination address You can configure 10 ten multicast addresses per switch Configuring a multicast address in Omega enables you to restrict certain packets to only go to a group of ports For example you may have a server running some special applications and you do not want all end stations in the network to receive packets from this server To configure a multicast address l Obtain your server s MAC address this might be the server with restricted applications 2 Select MAC Address Table Multicast addresses to display the following MAC Adinerges MAG Address Tahe MAC Addiece Forte for Muticust Packets AdMAC Eni pasar adam Ports Bor mukirast Feet Earle 13 8 cr all Dele MAC address En Pese Figure 4 11 Multicast Address Menu 3 Enterthe serv
68. te req de int nat pe doa un sisters c ea cru 2 5 Entering or Modifying Info rmatiOni t tret a edente a eg un p md donde t re ebat 2 6 Quitting the Terminal Interface te Configuring IP Paremetersic a cach ent htt ee oer ETE E oe cece tah DEL M ADM Ne ah LL d ae att Menu Navigation Using A Web BrOWSer ssssssssssssssssssssssesseessessssssssssssssussassusseeseeseesseesersesuunssuusmsssseesceeeseeeessesssssnuuunsamuneneseeseeeeeseeeseesette 2 8 Displaying SUBMENU Sa 5 2 xao erected eme iet eae oe Ses as NS RE nr e ANN 2 11 x eem 2 11 Entering orModifying InformablOD s eee ettet demas aeter c Nam SLT 2 11 TROIS 2 11 Resettingithie SWITCH cisti aan a dct eati eet dalek RA D d e LA aa liana seen MEE 2 12 About OptionalCornflguratiofis etti iat entities Den en rdg Det vete cr oat utu PR pe E Rd 2 13 MENU HC 2 14 Where to Go op 2 15 Table of Contents Chapter 3 Configuration s tdt ecd saci RR ELE RR PORE RE AN ccr e RUE 3 1 IP Parameters Port Configuratio asinn aa ra M X 3 4 Desci ption Of ODLIOnS suu eet E RR er Rl s tena e Rd a ac D ena ied ae 3 5 Port ED 3 6 dcbct c 3 6 Spanning gs uerfus 3 7 Configuring Spanning Tree P
69. the RS232 management port Remote Omega The default is enabled Remote Omega means you can access the management menus from a remote location by entering the switch s MAC address its configured IP address or user assigned unique name Web based Omega The default is enabled Web based Omega means you can accessthe management menus by connecting to your switch through a web browser This feature requires a TCP IP network Refer to Chapter 2 Menu Navigation Using A Web Browser for details on how to accessthe switch via the World Wide Web 3 12 Configuring a Password Configuring a Timeout Value AT S21 User s Guide To configure a password l Select System configuration gt Omega Options Enter a string of up to 20 characters in the Password field The text string displays as a series of asterisks The next time you restart Omega you must enter this password before you can start a session A user name is not required This password is not related to the download password for downloading software to the switch described in the section IP Parameters in this chapter To delete a password l 2 Select System configuration gt Omega Options Enter a space in the Password field To configure a timeout value 1 Select System configuration gt Omega Options Enter a value from 0 to 65 535 in minutes in the Timeout field If you enter 0 then you must always quit after a management session Otherwise subseque
70. ti ETT QU a Locate the MAC address label directly above the RS232 management port on the switch s front panel or Q Select Administration gt Diagnostics to read the MAC address from the screen Return to Main Menu 4 16 Software Downloads Conditions for Network Downloads Using TFTP AT S21 User s Guide You can download software upgrades from one switch to one or more switches on the network using Omega or download software via the trivial file transfer protocol TFTP from a TFTP server The switches described in this guide initially use a factory configured default password ATS21 to authorize software downloads You do not need to manually enter this password to download software successfully Software downloads do not require you to be physically at the destination switches Omega uses the trivial file transfer protocol TFTP of the TCP IP protocol suite to download software to other switches whether or not your network uses TCP IP The switch can download software to other switches of the same product family within the following conditions Q Theswitches must be directly connected to the same network cable or joined by switches bridges or routers If joined by routers the gateway addresses in both source and destination switches must be properly configured Q All switches receiving the same software must use the same download password as the source default ATS21 See Chapter 3 IP Parameters o
71. uide The switch view appears as shown in Figure 2 4 Links to Allied Telesyn s web page to the Internet Netscape Navigator s toolbar Pietucame id aue iira PII EI Da D Yer Bo bakari pert Decir mie i sjaje amp amp 8 9 FIT Cee Tick cna pact ber Check bekas Dot the Cenega Maa Mesi Port area Main menu Figure 2 4 The Switch View 3 Select that is click on menu items as follows Select the front panel of the switch to select an option or display information Depending on the area you click you either start from a list of all ports or you select a specific port Select Back on your browser s toolbar to return to the previous display Select Return to Main Menu not available at each display at the bottom of the Omega display to return to the main menu Use the browser s bookmark feature on frequently used views to bypass any Omega menu hierarchies 4 Link to other Allied Telesyn sites as follows Select Online Manual to go to Allied Telesyn s technical communications web page and download the switch s related guides in PDF Select Technical Support to go to Allied Telesyn s Technical Support web page and learn about other support services 2 9 Menu Navigation Using A Web Browser Select Send Email to submit feedback questions or any other information to Allied Telesyn Select What s New to find out about Allied Telesyn s latest product offerings Figure 2 5

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