3Com 3CRWE776075 Network Router User Manual
Contents
1. 7 Changing the Password To protect your 3Com Unified Switch 24 from unauthorized access you should change the default password as soon as possible To change the password 1 Log onto the switch m Ihe default username is admin m The default password is blank no entry 2 Select Administration gt Authentication gt Password Management 3 Click the Modify tab and enter your new password 4 Click Apply The password has now been changed gt Approved SFP Transceivers gt Inserting and using an SFP Transceiver AN 31 Using SFP Transceivers This sections describes how to insert and remove an SFP transceiver from an SFP slot SFP transceivers are hot insertable and hot swappable You can remove them from and insert them into any SFP port without having to power off the switch The following list of approved SFP transceivers is correct at the time of publication m 3CSFP91 SFP SX 1000BASE SX SFP transceiver Use this transceiver to connect the switch directly to a multimode fiberoptic cable m 3CSFP92 SFP LX 1000BASE LX SFP transceiver Use this transceiver to connect the switch directly to a single mode fiberoptic cable or to multimode fiber using a conditioned launch cable 3Com recommends using only 3Com SFPs on the switch If you insert an SFP transceiver that is not supported the switch will not recognize it To insert and use an SFP transceiver follow the procedure described below2. Get the latest firmware by visiting www 3Com com selecting Support amp Downloads then Downloads amp Drivers and entering the model number 3CRWE876075 c Use the Advanced Setup gt Administration page and scroll to the Firmware Upgrade Local section to upgrade the Stand alone firmware If the serial number of your access point is not BA or higher you must load a Managed firmware image to the access point a Get the Managed firmware image by visiting www 3Com com selecting Support amp Downloads then Downloads amp Drivers and entering the model number 3CRWE876075 b Use the Advanced Setup gt Administration page and scroll to the Firmware Upgrade Local section to upgrade the Managed firmware Change the access point Start up Mode from Stand alone to Managed using the Advanced Setup gt Administration page and scrolling to the Start up Mode section 6 Click the Change Start up Mode button 7 After the Configuration Complete message appears reset the access gt point by clicking the Reset button To make the access point active on your Unified Switch 24 see Activating the Managed Access Points on page 21 Note After the access point is in Managed mode it can no longer be accessed using WIDMan HTTP Telnet or SNMP An access point in 26 Preparing the Managed Access Points Resetting Access Points Managed mode can only be discovered and managed by the 3Com Unified Switch 24 To return the access
3. b On the 7760 use the Management gt Firmware Upgrade page and set Image Type to Managed to load the Managed firmware c Click the Upgrade button Change the access point Start up Mode from Stand alone to Managed using the System Configuration gt System Properties page 6 Click the Apply button The access point will reboot automatically 7 To make the access point active on your Unified Switch 24 see Activating the Managed Access Points on page 21 Note After the access point is in Managed mode it can no longer be accessed using WIDMan HTTR Telnet or SNMP An access point in Managed mode can only be discovered and managed by the 3Com Unified Switch 24 To return the access point to the default Stand alone mode refer to Resetting Access Points on page 26 of this Quick Start Guide Preparing the 8760 Access Point Preparing the 8760 Access Point 25 If you are not familiar with accessing the 3Com 8760 Web interface refer to the 8760 Access Point Quick Start Guide Log on to the access point Web interface Check the serial number on the back of the access point If the serial number starts with BA or higher a managed image is already installed You can skip steps 3 and 4 and go directly to step 5 Ensure the 8760 Stand alone firmware version is 2 1 13 or greater a View the firmware version on the Advanced Setup gt Status gt AP Status page b Upgrade the Stand alone firmware if required
4. Hold the transceiver so that the fiber connector is toward you and the product label is visible as shown in Figure 3 Ensure the wire release lever is closed in the upright position Gently slide the transceiver into the SFP slot until it clicks into place CAUTION SFP transceivers are keyed and can be properly inserted only one way If the transceiver does not click when you insert it remove it turn it over and then re insert it 32 Using SFP Transceivers Figure 3 Inserting the SFP Transceiver Product label Suitable port on host Switch 3 Check the SFP Module Status LEDs on the front of the switch The corresponding LED will light to indicate the SFP module is present A Remove the plastic protective cover if fitted Connect the fiber cable ul The transceiver connects to the network using a duplex LC connector Attach a male duplex LC connector on the network cable into the duplex LC connector on the transceiver N Connect the other end of the cable to a device fitted with an appropriate Gigabit Ethernet connection Removing an SFP Removing an SFP transceiver does not require powering off the switch Transceiver To remove an SFP transceiver 1 Disconnect the cable from the transceiver 2 Move the wire release lever downwards until it is pointing toward you 3 Pull the wire release lever toward you to release the catch mechanism 4 The SFP transceiver should slide out easily 33 Troubles
5. AT amp T 800 998 2112 54 11 4894 1888 AT amp T 800 998 2112 1 800 998 2112 AT amp T 800 998 2112 1 800 998 2112 AT amp T 800 998 2112 AT amp T 800 998 2112 5 7 1 657 0888 1 847 262 0070 1 800 876 3266
6. Preparing the wireless network on page 20 20 Connecting to the 3Com Unified Switch 24 must select Save Configuration to store your settings to the startup configuration If you do not select Save Configuration any modified settings will be lost the next time the switch Is restarted CAUTION To protect your switch from unauthorized access you should AN change the default password as soon as possible See Changing the Password on page 35 1 CAUTION When you make configuration changes to the switch you Preparing the To use the wireless features of your switch you must first connect a wireless network DHCP server to the switch The DHCP server is required to assign IP address to the managed access points If you are already using a cable DSL or traditional router to access the Internet you may use this router s DHCP functionality to provide IP addresses to the access points Refer to the figure below D Connect DHCP server first OEN DHCP Server u Unified Switch 24 AP 7760 AP 8760 Wireless Managed Wireless Managed Access Point Access Point Connect access points after DHCP server Activating the Managed Access Points au PR WW N Activating the Managed Access Points 21 To prepare your wireless network follow these steps Connect the DHCP server to a port on the Unified Switch 24 Make sure that the DHCP server
7. on copper cabling and introduce errors and consequently slow down your network m Water or moisture cannot enter the case of the unit 12 Installing the 3Com Unified Switch 24 Aufstellen des Switch Free Standing Installation m Air flow around the unit and through the vents on the side of the case is not restricted 3Com recommends that you provide a minimum of 25 mm 1 in clearance m Ihe air is as free of dust as possible m Temperature operating limits are not likely to be exceeded 3Com recommends that you install the switch in a clean air conditioned environment When installing network equipment it is always good practice to wear an antistatic wrist strap that is connected to a ground point If one is not available try to keep in contact with a grounded rack and avoid touching the unit s ports and connectors Static discharge can cause reliability problems in your equipment Bei der Entscheidung wo Sie den Switch positionieren stellen Sie sicher das m Der Switch zug nglich ist und die Kabel leicht angeschlossen werden k nnen m Die Kabel nicht in der n he von elektrischen St rquellen befinden Das schlie t Aufzugssch chte Mikrowellen und Klimaanlagen ein Elektromagnetische Felder k nnen die Signale in den Kupferleitungen st ren und Fehler verursachen was die Verlangsamung Ihres Netzwerkes zur Folge haben kann m Weder Wasser noch Feuchtigkeit in das Geh use eindringen kann a Die Luftzirkulat
8. powered on and ready for use Amber Power on self test or loopback test failed This indicates that there is a hardware malfunction Off The unit is not receiving power m Verify that the power cord is connected correctly and then try powering on switch again m f the switch still does not operate contact your 3Com network supplier If POST fails try the following m Power off the Switch 24 and then power it on again by unplugging and then plugging in the power cord m Check the System LED and determine if the POST was successfully completed m Reset the switch to the factory defaults See Reset Button on page 8 CAUTION Resetting the switch to its factory defaults erases all your settings You will need to reconfigure the switch after you reset it If these do not resolve the issue m Check the 3Com Knowledgebase for a solution To visit the 3Com Knowledgebase Web site start your Web browser and then enter http knowledgebase 3Com com m Contact your 3Com network supplier for assistance 17 Connecting to the 3Com Unified Switch 24 This section describes how to connect to the 3Com Unified Switch 24 and interact with the Web based user interface The user interface allows you to control the operation of the switch and configure its features Before you begin The following items are required before you can connect to your Unified Switch 24 a A Windows PC with Internet Explorer version 6 0 or greater is
9. required for using the Web based user interface m A DHCP server is required to use the wireless features of the switch The DHCP server is used to assign IP addresses to the managed access points Connecting your To configure your switch for the first time you Must connect your computer to the computer directly to the switch switch 169 254 2 100 Default IP address Unified Switch 24 169 254 2 200 Ethernet cable 1 Make sure that the switch is powered on see Supplying Power on page 15 2 Connect a network cable from your computer s Ethernet port to any Ethernet port on the Unified Switch 24 18 Connecting to the 3Com Unified Switch 24 Using the setup wizard gt CAUTION Do not connect any network cable to the Console port on the switch Connect only to the Ethernet ports Ensure that your computer is on the same subnet as the switch NOTE The switch s default IP address is 169 254 2 100 a If your computer is using static IP addressing ensure that its address is within the same subnet as the switch for example 169 254 2 200 b If your computer is not using static IP addressing Windows will automatically assign an IP address in the correct subnet Start your Web browser and type the switch s IP address into the address bar http 169 254 2 100 The Unified Switch 24 can be configur
10. the switch with a static IP address This makes management simpler and more reliable as it eliminates the risk of the switch s IP address changing Take amoment to record the IP settings you select IP Address Subnet Mask Default Gateway Use the Next button to access the Wireless Configuration page Set the default SSID and security that will be applied to all your access points This allows you to quickly setup a secure wireless network You can change these parameters later if you wish For complete wireless configuration information refer to the User Guide Take amoment to record the wireless settings you select SSID Security Type Passphrase VLAN ID Use the Next button to access the Wizard Summary page Review your settings and use the Back button if you wish to make any changes When you are satisfied with your settings click the Finish button to complete the wizard and save your settings If you have changed the default IP address of the switch follow these steps to log onto the switch a After you click Finish click OK to confirm the changed IP address b Configure your PC s IP address to have the same subnet as the switch c Log onto the switch again using the new IP address Select Save Configuration to store your switch settings to the startup configuration The switch is now fully configured for basic Layer 2 networking If you wish to use the switch s wireless features continue with the steps in
11. two mounting brackets and four screws When rack mounting the unit you should take note of the guidelines given in Choosing a Suitable Location on page 11 CAUTION Disconnect all cables from the unit before continuing Remove the self adhesive pads from the underside of unit if already fitted Place the unit on a hard flat surface with the front facing towards you Position a mounting bracket over the mounting holes on one side of the unit Refer to Figure 2 Attaching Rack Mount Hardware on page 14 Insert the screws supplied in the mounting kit and fully tighten with a Suitable screwdriver Repeat the two previous steps for the other side of the unit Insert the unit into the 19 inch rack and secure with suitable screws not provided Reconnect all cables 14 Installing the 3Com Unified Switch 24 Montagesatz Anweisungen Figure 2 Attaching Rack Mount Hardware U Qr Tr Der Switch wird mit zwei Halterungen und vier Schrauben geliefert Diese werde f r den Einbau in einen Baugruppentr ger benutzt Bei der Montage der Baugruppe beachten Sie die Anweisungen aus Aufstellen des Switch Der Switch ist eine Baueinheit hoch und passt in einen Standard 19 Zoll Baugruppentr ger ACHTUNG Entfernen Sie alle Kabel bevor Sie fortfahren Entfernen Sie die selbstklebenden Polster F e von der Unterseite der Baugruppe falls diese bereits angebracht sind Plazieren
12. 07 5984 South Korea 080 698 0880 1800 812 612 Taiwan 00801 444 318 0800 450 454 Thailand 001 800 441 2152 Pakistan Call the U S direct by dialing 00 800 01001 then dialing 800 763 6780 Sri Lanka Call the U S direct by dialing 02 430 430 then dialing 800 763 6780 Vietnam Call the U S direct by dialing 1 201 0288 then dialing 800 763 6780 You can also obtain non urgent support in this region at this email address apr technical support 3com com Or request a return material authorization number RMA by FAX using this number 61 2 9937 5048 or send an email at this email address ap rma request 3com com Europe Middle East and Africa Telephone Technical Support and Repair From anywhere in these regions not listed below call 44 1442 435529 40 Obtaining Support for your 3Com Product Country Telephone Number Country From the following countries call the appropriate number Austria 0800 297 468 Luxembourg Belgium 0800 71429 Netherlands Denmark 800 17309 Norway Finland 0800 113153 Poland France 0800 917959 Portugal Germany 0800 182 1502 South Africa Hungary 06800 12813 Spain Ireland 1 800 553 117 Sweden Israel 180 945 3794 Switzerland Italy 800 879489 U K Telephone Number 800 23625 0800 0227788 800 11376 00800 4411 357 800 831416 0800 995 014 900 938 919 020 795 482 0800 553 072 0800 096 3266 You can also obtain support in this region using this URL http emea 3com com support email html You can also obtain
13. 3Com Unified Gigabit Wireless PoE Switch 24 Quick Start Guide Kurzanleitung 3CRUS2475 Copyright 2006 3Com Corporation All rights reserved www 3Com com Part Number 10015246 Rev AA Published September 2006 About this Guide This guide is intended for use by those responsible for installing and setting up network equipment consequently it assumes a basic working knowledge of LANs local area networks and WLANs wireless local area networks Diese Anleitung ist tur die Benutzung durch Netzwerkadministratoren vorgesehen die fur die Installation und das einstellen von Netzwerkkomponenten verantwortlich sind sie setzt Erfahrung bei der Arbeit mit LANs Local Area Networks und WLANs Wireless Local Area Networks voranus Get the latest documentation and software for your 3Com switch Thank you for purchasing a 3Com Unified Gigabit Wireless PoE Switch 24 As part of our commitment to help you get the most out of your 3Com network equipment we offer updated documentation and software on our website In addition to this Quick Start Guide a detailed User Guide and a Command Line Interface Guide are also available on the 3Com website To obtain the most up to date user documentation and operating software for the 3Com Unified Switch 24 point your web browser to www 3Com com and select the Support and Registration link Please note that you must register your 3Com switch to receive software upgrades To reg
14. Sie die Baugruppe aufrecht auf einer harten ebenen Fl che mit der Vorderseite zu Ihnen Ordnen Sie eine der Halterungen ber den L chern an der Seite der Baugruppe an Stecken Sie zwei der mitgelieferten Schrauben in die L cher und drehen Sie diese mit einem geeigneten Schraubendreher fest Widerholen Sie letzten beiden Schritte auf der anderen Seite der Baugruppe F hren Sie die Baugruppe in den 19 Zoll Baugruppentr ger ein und sichern sie die Baugruppe mit geeigneten Schrauben Nicht im Lieferumfang enthalten Schlie en Sie alle Kabel wieder an Supplying Power gt AN AN 1 Stromversorgung gt AN AN Supplying Power 15 Ensure that the power input to your system is clean and free from sags and surges to avoid unforeseen network outages Before powering on the switch verify that the power cable is securely connected CAUTION The switch has no On Off switch the only method of connecting or disconnecting main power Is by connecting or disconnecting the power cord CAUTION Connect the switch to a properly grounded electrical outlet using only the supplied power cord Plug the power cord into the power socket on the rear panel of the switch See page 8 for more information Plug the other end of the power cord into a properly grounded outlet When the switch is powered on the System LED lights If the System LED does not light see Checking for Correct Operation on page 16 for mor
15. TK The LTK is shared between the unified switch and the access point An access point that has been activated by a unified switch will only communicate with that one switch If you later wish to activate the access point on a different unified switch you must clear the LTK by performing a Short Reset on the access point as described in Resetting Access Points on page 26 22 Connecting to the 3Com Unified Switch 24 23 Preparing the Managed Access Points The 3Com Unified Switch 24 supports these 3Com access points m 3Com Wireless 7760 11a b g PoE Access Point 3CRWE776075 m 3Com Wireless 8760 Dual Radio 11a b g PoE Access Point 3CRWE876075 The AP 7760 and AP 8760 are dual function access points and have two start up modes Stand alone and Managed The start up mode determines how the access point operates Stand alone mode The access point operates as an independent fully functional standalone device This is the default operating mode of the access point Managed mode The access point operates as a device that is dependent on the 3Com Unified Switch 24 for management and control Managed mode is only used if you are operating the 7760 and 8760 with the 3Com Unified Switch 24 In order to use the access points with the 3Com Unified Switch 24 you must first prepare the access points as follows Ensure the access point Stand alone firmware is at the minimum required level 2 Ensure that a Managed firmware im
16. ade your Switch to the Latest Software Running a New Software Image This sections describes how to run software that you have uploaded to the switch To put the software image into your switch see Loading Software into the Switch on page 27 To run new software you must set the image to become active after the switch is reset The Active Image tab identifies which image is currently active and which image will be used after the next reset To select new software to run Select Administration gt Software Update then click the Active Image tab The Active Image field displays the name of the software image currently in use either Image 1 or Image 2 Set the Active Image After Reset field to the other software image For example if Active Image displays Image 1 set Active Image After Reset to Image 2 Reset the switch by selecting Administration gt Reset 29 Restoring the Factory Default Settings CAUTION Resetting the switch to factory defaults will erase all your settings You will need to reconfigure all settings To reset the switch to factory defaults 1 Unplug the power cord from the back of the unit 2 Press and hold the Reset button on the back of the switch 3 While still pressing the Reset button plug the power cord into the back of the unit Continue pressing the reset button for 10 seconds Release the Reset button The switch is now reset to factory defaults 30 Changing the Password
17. age is present on the access point 3 Set the access point to Managed mode The following sections Preparing the 7760 Access Point and Preparing the 8760 Access Point describe how to prepare the 3Com access points for use with your Unified Switch 24 24 Preparing the Managed Access Points Preparing the 7760 Access Point If you are not familiar with accessing the 3Com 7760 Web interface refer to the 7760 Access Point Quick Start Guide Log on to the access point Web interface Check the serial number on the back of the access point If the serial number starts with BA or higher a managed image is already installed You can skip steps 3 and 4 and go directly to step 5 Ensure the 7760 Stand alone firmware version is 1 5 25 or greater a View the firmware version on the Management gt Firmware Upgrade page b Upgrade the Stand alone firmware if required Get the latest firmware by visiting www 3Com com Select Support amp Downloads then Downloads amp Drivers and enter the model number 3CRWE776075 c Use the Management gt Firmware Upgrade page and set Image Type to Stand alone to load the Stand alone firmware If the serial number of your access point is not BA or higher you must load a Managed firmware image to the access point a Get the Managed firmware image by visiting www 3Com com selecting Support amp Downloads then Downloads amp Drivers and entering the model number 3CRWE776075
18. dards 35 Technical Information The 3Com Unified Gigabit Wireless PoE Switch 24 has been designed to the following standards Function IEEE 802 3 Ethernet 10Base T IEEE 802 3u Fast Ethernet 100Base TX IEEE 802 3ab Gigabit Ethernet 1000Base T and IEEE 802 3z Gigabit Ethernet 1000Base X IEEE 802 3x Flow Control IEEE 802 1d 1998 Bridging IEEE 802 1p Virtual LAN IEEE 802 af DTE Power MAC Address 8192 Safety UL 60950 1 CSA 22 2 No 60950 1 EN 60950 1 IEC 60950 1 EMC Emissions FCC Part 15 Subpart B Class A EN 55022 Class A ICES 003 Class A CISPR 22 Class A VCCI Class A EN 61000 3 2 EN 61000 3 3 Immunity EN 55024 EN 60601 1 2 Environmental Operating Temperature 0 to 40 C 32 to 104 F Storage Temperature 40 to 70 C 40 to 158 F Humidity 10 to 95 non condensing Standard EN 60068 IEC 68 36 Technical Information Physical Electrical Width Length Height Weight Mounting Power Inlet AC Line Frequency Input Voltage Current Rating Maximum Power Consumption Maximum Power Dissipation PoE Maximum Output Power per Port 44 0 cm 17 3 in 41 5 cm 16 3 in 4 4 cm 1 75 in or 1U 5 9 kg 13 0 Ib Free standing or 19 in rack mounted using the supplied mounting kit IEC 320 50 60 Hz 3 Hz 100 240 Vac auto range 8 Amp maximum 465 Watts 207 BTU hr 15 4 watts Power can also be provided by the switch through any of its 24 Ethernet port
19. e information Stellen Sie sicher dass der Stromeingang zum System frei ist und vor Unter und berspannungen gesch tzt ist Bevor Sie den Switch mit Strom versorgen stellen Sie sicher dass das Netzkabel sicher eingesteckt ist WARNUNG Der Switch hat keinen Ein Aus Schalter die einzige Methode zum Verbinden oder Trennen vom Stromnetz ist es das Netzkabel ein oder auszustecken WARNUNG Verbinden Sie den Switch nur mit dem mitgelieferten Netzkabel und einem ordnungsgem geerdeten Stromanschluss Stecken Sie das Netzkabel in den Stromanschluss auf der Hinterseite des Switch Weitere Informationen finden Sie auf page 8 Stecken Sie das andere Ende des Stromkabels in einen ordnungsgem geerdeten Stromzugang Wenn der Switch mit Strom versorgt wird leuchtet die System LED Wenn die System LED nicht leuchtet finden Sie unten weitere Informationen unter Checking for Correct Operation on page 16 16 Installing the 3Com Unified Switch 24 Checking for Correct Operation After you power on the switch it automatically performs a power on self test POST During the POST the System LED on the front panel of the switch flashes green When the POST is complete the System LED turns green If the System LED turns amber after the POST it means that POST failed Table Table 2 summarizes the possible colors for the System LED after a POST Table 2 Possible System LED Colors After a POST Color State Green The unit is
20. ed through its web interface using either the feature menu items or by using the Setup Wizard This section describes how to use the Setup Wizard to quickly configure your switch for basic Layer 2 and wireless networking The wizard guides you through configuring the system settings IP settings wireless settings and saving your changes For complete configuration information refer to the User Guide If you have not done so already access the switch s Web user interface by typing the switch s IP address into the address bar of your Web browser http 169 254 2 100 Log onto the switch by entering the user name and password and clicking the Login button m Ihe default username is admin Ihe default password is blank no entry Launch the Setup Wizard by clicking the Wizard tab A welcome screen is displayed showing the switch s current configuration You will use the Next and Back buttons to navigate the wizard and configure your switch Use the Next button to access the System Setup page If you want to use wireless you must check Master Radio Enable and select the appropriate Country Code This setting is used to determine the allowable radio channels for your access points The System Name Location and Contact are optional 5 10 Using the setup wizard 19 Use the Next button to access the IP Configuration page and choose either Static or DHCP addressing For most installations 3Com recommends that you configure
21. ervices are offered to fill resource gaps and ensure the success of your networking projects For more information on 3Com Extended Warranty and Professional Services see http www 3Com com Contact your authorized 3Com reseller or 3Com for additional product and support information See the table of access numbers later in this appendix You are entitled to bug fix maintenance releases for the version of software that you Initially purchased with your 3Com product To obtain access to this software you need to register your product and then use the Serial Number as your login Restricted Software is available at http eSupport 3Com com To obtain software releases that follow the software version that you originally purchased 3Com recommends that you buy an Express or Guardian contract a Software Upgrades contract or an equivalent Support contract from 3Com or your reseller Support contracts that include software upgrades cover feature enhancements incremental functionality and bug fixes but they do not include software that is released by 3Com as a separately ordered product Separately orderable software releases and licenses are listed in the 3Com Price List and are avallable for purchase from your 3Com reseller 3Com offers telephone internet and e mail access to technical support and repair services To access these services for your region use the appropriate telephone number URL or e mail address from the table in
22. es include m Enterprise grade WPA2 AES encryption m 802 1X authentication Centralized control for wireless security profiles m Fast roaming m Rogue AP detection and mitigation m Multiple SSIDs per radio a Traffic prioritization m Load balancing Checking the Package Contents AN AN Choosing a Suitable Location 11 Installing the 3Com Unified Switch 24 The Unified Switch 24 package includes the following items One 3Com Unified Gigabit Wireless PoE Switch 24 unit m One power cord m Four standard height self adhesive rubber pads m One mounting kit m One warranty flyer and one safety flyer m This Quick Start Guide If any of the above items are damaged or missing please contact your network supplier immediately WARNING Before installing this switch please read the safety flyer included with the unit GEFAHR Lesen Sie bitte vor Installation des Switch das diesem Ger t beiliegende Sicherheitsblatt durch The switch can be free standing see Free Standing Installation on page 12 or it can be mounted in a 19 inch equipment rack using the supplied mounting kit see Rack Mount Installation on page 13 When deciding where to position the switch ensure that m It is accessible and cables can be connected easily m Cabling is away from sources of electrical noise These include elevator shafts microwave ovens and air conditioning units Electromagnetic fields can interfere with the signals
23. ex mismatch between the switch and a connected device Ensure that the connected device has either m Auto negotiation enabled or m The ports are configured for half duplex operation Browser cannot find the Unified Switch 24 Make sure that m Ihe PC s IP address is in the same IP subnet as the switch m Ihe PC s subnet mask matches the subnet mask of the switch Trouble discovering the access points Make sure that m Ihe switch IP address is in the same IP subnet as the DHCP server m tTheswitch s subnet mask matches the subnet mask of the DHCP server LTK Error message when activating an AP An LTK error is caused by either of the following situations m You are trying to activate an AP is already activated on another unified switch m You are trying to activate an AP that was previously activated on another unified switch When an AP is activated on a unified switch the AP is imprinted with a special security key LTK that is shared between the unified switch and the AP An AP that has been activated by a unified switch will only communicate with that one switch If you later wish to activate the AP on a different unified switch you must clear the LTK by performing a Short Reset on the AP as described in Resetting Access Points on page 26 If the Problem Persists If the problem persists refer to the more detailed troubleshooting information in your User s Guide or on the 3Com Web site 10 Related Stan
24. form a long reset press and hold the Reset button for at least 20 seconds Loading Software into the Switch oa vv BP WN 27 Upgrade your Switch to the Latest Software This section describes how to upgrade your 3Com Unified Switch 24 to the latest software The latest software for your switch can be obtained by visiting www 3Com com selecting Support amp Downloads then Downloads amp Drivers and entering the model number 3CRUS2475 To provide enterprise grade redundancy the switch maintains two software images in memory Image 1 and Image 2 One image is used to run the switch active and the other image provides backup redundancy You can set which image is running and which is redundant This sections describes how to put a new software image into your Unitied Switch 24 To run the new software see see Running a New Software Image on page 28 The switch software can be loaded using HTTP or TFTP HTTP instructions are listed below For details on TFTP please refer to the User Guide To upgrade the switch software using HTTP Copy the latest switch software from www 3Com com to your PC Expand the downloaded software Log in to the switch Web interface Select Administration gt Software Update Select Download via HTTP Click Browse and locate the software you previously copied to your PC Click Apply The software will be loaded into the software image location that is not active 28 Upgr
25. hooting For complete troubleshooting information please refer to your User s Guide or visit 3Com s World Wide Web site http www 3Com com Here are some common problems that can occur Forgotten Password If you forget the password to the Web interface you will need to reset the switch to factory defaults See Restoring the Factory Default Settings on page 29 A link is connected but the Port Status LED for the port is off There is a problem with this connection Verify that m The device being connected to is powered on and operating correctly m The cable is connected at both ends m The cable is not damaged a If the connection is to a workstation that the workstation s network interface is installed and configured correctly m The correct category of cable is being used for the required link speed Category 3 cables can be used for 10BASE T operation only Category 5 cable is required for 100BASE TX or 1000BASE T 3Com recommends Category 5e or 6 cables for 1000BASE T operation A fiber cable is connected but the Module Status LED is off Verify that m The fiber cable is in good condition m The SFP module is correctly inserted m A 3Com SFP module is being used Refer to Using SFP Transceivers on page 31 for details m The equipment at the far end is installed and correctly configured 34 Troubleshooting The Port Status LED is on but network performance is poor There may be a full duplex half dupl
26. ion um den Switch und durch die ffnungen des Geh uses nicht behindert wird 3Com empfiehlt das Sie 25mm 1 Inch Zwischenraum sicherstellen m Die Luft so frei wie m glich von Staub ist m Es unwahrscheinlich ist das die Betriebstemperatur berschritten wird 3Com empfiehlt das Sie den Switch in einer sauberen klimatisierten Umgebung installieren Place the switch on a stable flat surface where it is not likely to be disturbed Do not place objects on top of the switch or on top of a stack of switches When locating the unit you should take note of the guidelines given in Choosing a Suitable Location on page 11 gt Placing Units On Top of Each Other Rack Mount Installation Rack Mount Installation 13 If you are installing the switch in a free standing stack with other 3Com equipment arrange the smaller units above the larger ones Do not have a free standing stack of more than four units If the switch units are free standing up to four units can be placed one on top of the other If you are mixing a variety of 3Com equipment the smaller units must be positioned at the top If you are placing switch units one on top of the other you must use the self adhesive rubber pads supplied Apply the pads to the underside of each switch sticking one in the marked area at each corner The switch is one rack unit 1U or 1 75 in high and will fit in a standard 19 inch equipment rack The supplied mounting kit includes
27. is on the same IP subnet and is using the same subnet mask as IP configuration of the switch Connect the wireless access points to the switch only after you have connected the DHCP server and it is fully operational To prepare the access points see Preparing the Managed Access Points on page 23 Managed access points must be either directly connected to the switch or connected using a Layer 2 network to the same subnet as the switch The switch and the managed access points must be on the same Layer 2 subnet in order for them to communicate To Discover and Activate the managed access points follow these steps Ensure the access points are converted to managed access points Refer to Preparing the Managed Access Points on page 23 Ensure the access points are connected to the switch Log in to the Web interface of the switch Select Device Summary then click the Wireless tab In a short time you should see a list of Discovered Access Points Press the Activate button for each access point that you want to be controlled by your switch The switch will take several minutes to activate the access points When the state has changed to Activated the wireless network is ready for use You can access the wireless network using the SSID and security parameters you configured in the setup wizard NOTE When an access point is activated on a unified switch the access point is imprinted with a special security key L
28. ister point your web browser to eSupport 3Com com 4 Get the latest documentation and software for your 3Com switch Contents About this Guide 2 Get the latest documentation and software for your 3Com switch 3 Introducing the 3Com Unified Gigabit Wireless POE Switch 24 7 Overview of the Unified Gigabit Wireless PoE Switch 24 9 Unified Switching 9 Wired Features 10 Power over Ethernet PoE Features 10 Wireless Features 10 Installing the 3Com Unified Switch 24 11 Checking the Package Contents 11 Choosing a Suitable Location 11 Aufstellen des Switch 12 Free Standing Installation 12 Placing Units On Top of Each Other 13 Rack Mount Installation 13 Montagesatz Anweisungen 14 Supplying Power 15 Stromversorgung 15 Checking for Correct Operation 16 Connecting to the 3Com Unified Switch 24 17 Before you begin 17 Connecting your computer to the switch 17 Using the setup wizard 18 Preparing the wireless network 20 Activating the Managed Access Points 21 10 11 Preparing the Managed Access Points 23 Preparing the 7760 Access Point 24 Preparing the 8760 Access Point 25 Resetting Access Points 26 Upgrade your Switch to the Latest Software 27 Loading Software into the Switch 27 Running a New Software Image 28 Restoring the Factory Default Settings 29 Changing the Password 30 Using SFP Transceivers 31 Approved SFP Transceivers 31 Inserting and using an SFP Transceiver 31 Removing an SFP Transceiver 32 Troub
29. leshooting 33 Technical Information 35 Related Standards 35 Environmental 35 Physical 36 Electrical 36 Obtaining Support for your 3Com Product 37 Register Your Product to Gain Service Benefits 37 Solve Problems Online 37 Purchase Extended Warranty and Professional Services 38 Access Software Downloads 38 Contact Us 38 Telephone Technical Support and Repair 39 1 Introducing the 3Com Unified Gigabit Wireless PoE Switch 24 Figure 1 Front and Rear Views of the Unified Switch 24 1 amp 2 3 567 8 I TA scom CAC A AC A AG a gg gg CLL Table 1 Features of the Unified Switch 24 Reference Description 1 10 100 1000 Mbps Network Ports 1 24 These autonegotiating ports determine the speed and duplex mode based on the connected device Each port supports automatic MDI MDIX detection and can be connected to a 10BASE T 100BASE T or 1000BASE T device 2 LED Port Status Indicators Each Network Port has a corresponding status indicator 1 to 24 that shows the status of the port s network connection or PoE status depending on the LED Status Select button Port Speed m Green steady 1000 Mbps link is present m Green flashing 1000 Mbps traffic is present m Amber steady 10 100 Mbps link is present m Amber flashing 10 100 Mbps traffic is present m Off Link is not
30. mber steady The switch is too hot Amber flashing One or more fans have failed System Indicator Shows the overall status of the switch m Green steady The switch is powered up and operating normally m Green flashing The switch is undergoing self test initialization or downloading m Amber steady The switch has detected a hardware malfunction such as temperature fan or voltage m Off No power The switch is off Console Port Allows you to connect a terminal and perform out of band management The default communications settings are 19200 bps 8 data bits no Parity 1 stop bit Reset Button Use the reset button to restore the switch to its factory defaults See Restoring the Factory Default Settings on page 29 AC Power Input Accepts 100 240 Vac 50 60 Hz input power The switch automatically adjusts to the input voltage Feet These are self adhesive pads You do not need to install them if you are rack mounting the switch Overview of the Unified Gigabit Wireless PoE Switch 24 Unified Switching Overview of the Unified Gigabit Wireless PoE Switch 24 9 WARNING The Network Ports are shielded RJ 45 data sockets They cannot be used as standard traditional telephone sockets or to connect the unit to a traditional PBX or public telephone network Connect only RJ 45 data connectors network telephony systems or network telephones to these sockets Either shielded or unshielded data cables with shielded or
31. non urgent support in this region at these email addresses Technical support and general requests customer_support 3com com Return material authorization warranty_repair 3com com Contract requests emea_contract 3com com Latin America Telephone Technical Support and Repair Antigua 1 800 988 2112 Guatemala Argentina 0 810 444 3COM Haiti Aruba 1 800 998 2112 Honduras Bahamas 1 800 998 2112 Jamaica Barbados 1 800 998 2112 Martinique Belize 52 5 201 0010 Mexico Bermuda 1 800 998 2112 Nicaragua Bonaire 1 800 998 2112 Panama Brazil 0800 13 3COM Paraguay Cayman 1 800 998 2112 Peru Chile AT amp T 800 998 2112 Puerto Rico Colombia AT amp T 800 998 2112 Salvador Costa Rica AT amp T 800 998 2112 Trinidad and Tobago Curacao 1 800 998 2112 Uruguay Ecuador AT amp T 800 998 2112 Venezuela Dominican Republic AT amp T 800 998 2112 Virgin Islands You can also obtain support in this region in the following ways m Spanish speakers enter the URL http lat 3com com lat support form html m Portuguese speakers enter the URL _http lat 3com com br support form html m English speakers in Latin America send e mail to lat support anc 3com com US and Canada Telephone Technical Support and Repair All locations Network Jacks Wired or Wireless Network Interface Cards All other 3Com products AT amp T 800 998 2112 5 7 1 657 0888 AT amp T 800 998 2112 1 800 998 2112 5 1 657 0888 01 800 849CARE AT amp T 800 998 2112
32. point to the default Stand alone mode refer to Resetting Access Points below AP Recovery To recover an access point that was inadvertently changed to Managed mode perform a long reset as described below The long reset changes the access point s start up mode back to the factory default of Stand alone mode Using a long reset is the only way to return an access point from Managed mode to Stand alone mode To perform a long reset during power up press and hold the Reset button for at least 20 seconds Reset Button The Reset button on the access points can be used to perform two different types of system reset a short reset and a long reset Short Reset A short reset deletes the current configuration file and restores the factory settings The short reset does not change the start up mode of the access point so if the start up mode of the access point is in Stand alone it will remain in Stand alone mode If the start up mode of the access point is in Managed it will remain in Managed mode To perform a short reset press and hold the Reset button for at least 5 seconds but not more than 20 seconds Long Reset A long reset changes the start up mode of the access point back to the factory default mode of Stand alone This is only used if the access point was inadvertently changed to Managed mode and you want to return it to Stand alone mode A long reset is the only way to return from Managed mode to Stand alone mode To per
33. present PoE Status m Green steady PoE Power is being delivered to the port m Off No power is being delivered 8 Introducing the 3Com Unified Gigabit Wireless PoE Switch 24 Table 1 Features of the Unified Switch 24 continued Reference 3 10 11 Description LED Status Select Button This button sets the function of the Port LED indicators When the button is in the out position the port LEDs show the port speed see 2 above When the button Is pressed in the port LEDs show the PoE status SFP Module Slots 21 24 The four Small Form Factor Pluggable SFP transceiver slots allow you to install an SFP transceiver purchased separately These ports support fiber Gigabit Ethernet short wave SX and long wave LX SFP transceivers in any combination When an SFP module is installed in a slot and is active the associated RJ 45 port 21 to 24 of the same number is disabled SFP Module Status Indicator The four SFP status LED indicators show the state of the SFP module ports 21 to 24 see 4 m Green An SFP fiber module is present m Off No fiber module is present When an SFP module is present the fiber port activity is indicated by the corresponding LED over the RJ 45 port 21 to 24 m Green steady Fiber link is present m Green flashing Fiber link traffic is present m Off Link is not present Fan Indicator Shows the status of the internal fans Green steady All fans are functioning properly A
34. s based on the IEEE 802 3af Power over Ethernet PoE specifications For PoE to work the receiving device must be PoE compliant 11 Register Your Product to Gain Service Benefits Solve Problems Online 37 Obtaining Support for your 3Com Product 3Com offers product registration case management and repair services through eSupport 3Com com You must have a user name and password to access these services which are described in this appendix To take advantage of warranty and other service benefits you must first register your product at http eSupport 3Com com 3Com eSupport services are based on accounts that are created or that you are authorized to access 3Com offers the following support tool m 3Com Knowledgebase Helps you to troubleshoot 3Com products This query based interactive tool is located at http knowledgebase 3Com com It contains thousands of technical solutions written by 3Com support engineers 38 Obtaining Support for your 3Com Product Purchase Extended Warranty and Professional Services Access Software Downloads Contact Us To enhance response times or extend your warranty benefits you can purchase value added services such as 24x7 telephone technical support software upgrades on site assistance or advanced hardware replacement Experienced engineers are available to manage your installation with minimal disruption to your network Expert assessment and implementation s
35. the next section Telephone Technical Support and Repair Contact Us 39 To obtain telephone support as part of your warranty and other service benefits you must first register your product at http eSupport 3Com com When you contact 3Com for assistance please have the following information ready m Product model name part number and serial number m A list of system hardware and software including revision level m Diagnostic error messages m Details about recent configuration changes if applicable To send a product directly to 3Com for repair you must first obtain a return materials authorization number RMA Products sent to 3Com without authorization numbers clearly marked on the outside of the package will be returned to the sender unopened at the sender s expense If your product is registered and under warranty you can obtain an RMA number online at_http eSupport 3Com com First time users must apply for a user name and password Telephone numbers are correct at the time of publication Find a current directory of 3Com resources by region at http csoweb4 3Com com contactus Country Telephone Number Country Telephone Number Asia Pacific Rim Telephone Technical Support and Repair Australia Hong Kong India Indonesia Japan Malaysia New Zealand 1800 075 316 Philippines 1800 144 10220 or 2907 0456 029003078 000 800 440 1193 PR of China 800 810 0504 001 803 852 9825 Singapore 800 616 1463 03 35
36. ting point for IP telephony solutions A unified switch is an all in one fully managed Ethernet switch combining gigabit wireless and PoE connectivity in a single platform The Unified Switch 24 supports both wired Ethernet switching and centralized control for up to 24 wireless access points 10 Introducing the 3Com Unified Gigabit Wireless PoE Switch 24 Wired Features Power over Ethernet PoE Features Wireless Features The switch has 24 shielded RJ 45 10 100 1000 Mbps auto negotiating ports and four Small Form Factor Pluggable SFP transceiver slots on the front panel The four SFP ports support fiber Gigabit Ethernet short wave SX and long wave LX SFP transceivers in any combination This offers you the flexibility of using SFP transceivers to provide connectivity between the switch and a 1000 Mbps core network When an SFP port is in operation the corresponding 10 100 1000BASE T port 21 to 24 is disabled The switch can provide Power over Ethernet PoE to 802 3af compliant devices over a Category 5 or better Ethernet cable The switch can supply up to 15 4 Watts of PoE to each of the 24 gigabit ports simultaneously PoE 802 3af is a self configuring protocol When you plug an 802 3af device into one of the gigabit ports on the switch the switch will supply the required power to the device The 3Com Unified Switch 24 provides centralized control for up to 24 3Com 7760 or 8760 Access Points Key wireless featur
37. unshielded jacks can be connected to these data sockets AVERTISSEMENT Points d acc s RJ 45 Ceux ci sont prot g s par des prises de donn es Ils ne peuvent pas tre utilis s comme prises de telephone conventionnelles standard ni pour la connection de l unit a un r seau t l phonique central priv ou public Raccorder seulement connecteurs de donn es RJ 45 syst mes de r seaux de t l phonie ou tel amp phones de r seaux ces prises Il est possible de raccorder des c bles prot g s ou non prot g s avec des jacks prot g s ou non prot g s ces prises de donn es WARNHINWEIS RJ 45 Porte Diese Porte sind gesch tzte Datensteckdosen Sie d rfen weder wie normale traditionelle Telefonsteckdosen noch f r die Verbindung der Einheit mit einem traditionellem privatem oder ffentlichem Telefonnetzwerk gebraucht werden Nur RJ 45 Datenansclu e Telefonnetzsysteme or Netztelefone an diese Steckdosen anschlie en Entweder gesch tzte oder ungesch tzte Buchsen d rfen an diese Datensteckdosen angeschlossen werden The 3Com Unified Gigabit Wireless PoE Switch 24 is a versatile easy to use unified switch It is shipped ready for use and no configuration is necessary for operation as a basic Layer 2 Gigabit PoE switch Additional features such as wireless can be configured easily using the Web based user interface and setup wizard Support for PoE and voice auto prioritization makes the Unified Switch 24 a perfect star
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