TECHNICAL DESCRIPTION AND USER MANUAL
Contents
1. O 1 min IH C Win P 1 ko dm pa B m rwa rd 4 sec iframe transition microaosec microsec microsec microsec microsec micrasec microsec 008 microsec 000 microsec 000 microsec microsec 008 microsec 008 microsec 008 mic Overall resuts Throughput Back to back Frame loss Latency test test test test m 4 h H LE n idis i Co S on hI Pa Co Ti Ca MI co io iD TS 25 0 micro speed speed speed speed speed speed speed PI c microsec microsec ifs OO m A At H hi n in from loopback a CO 3 of Ca ooo Ca CO l n hi n im 3 CO C Lu oF o op gb op op ge gt 25 16 17 26 STATISTICS A number of detected errors and events are displayed in this mode CABLE TEST The ATLAN device has built in Gigabit Ethernet transceiver with cable fault detection functions In modern Ethernet networks a copper cable with four twisted pairs 15 used a transmissi2. TD 000000 0 50 43 00 168 000 2976150 16858185 305757 469924 239463 192307 162548 oo O O O ooo 0 0 Fa Discard pause frames ob d op oo go ge of is fr fr fr fr fr fr fr See ee ee ee ee eee ee take ooo oo O O for 100 e ooo oO C C ooo co ob d gp op op go ge op cn i ha vC C XXL LL LL of Zz i O i O Ci O O CI C ae oe op ge oe op op ge op P Stream 100 Stream 30 Stream 80 Stream 70 Stream e Stream 50 Stream 40 Stream 30 Stream 20 Stream 10 Latency te OF oP oF oP oof oP oP oof ob ooo O CO ooo C3 3 ca LI CO OF oR oP oF oP oo oP oP oof oft ooo C3 3 1 1 ono 3 oO oo c c oF oP op op op ge CO 3 oOo r cn Ca ca Co Ooo C ci c c Elapsed _ LEXIC mode Ihreshold 1024 1280 1518 min min min min min min min time 0 r Store and Fo 1 125 H 1 i S on idis cn 4 57 2 576 6 6 il b 3 C ur dy Oy il i in H on T Cham am 1024 1280 1518 Ca CO
3. Microsoft folder dotnetfx 20 x32 exe for 32 bit Windows dotnetfx 20 x64 exe for 64 bit Windows Setup a package you need Restart you PC Plug your device to PC Power your device with 12 V adapter Turn on the device Press F2 button when start screen appears 41 24 25 42 Enter software update item Start the updater program Press Start the update button Wait until it completes Exit firmware update mode Enter menu item Continue Wait until main menu appears Disable the device Enable device and check new firmware version at start screen third value It is recommended to clear all configurations Contact service 1f problems arise STORAGE AND TRANSPORTATION Device transportation 15 performed in a firm package Before long storage or transportation it 1s required to remove accumulator batteries pack Storage room must not contain excessive dust water vapor or aggressive substances vapor WARRANTY Manufacturer guarantees device functionality when operation conditions storage conditions and transportation conditions are met Warranty period 12 month starting from sells date excluding batteries If device malfunction detected please call us and send the device to the following address 170043 Tver p o box 43100 SVJAZPRIBOR phone 4822 42 54 91 51 50 72 fax 4822 42 54 91 http www svpribor ru sales svpribor ru 260 DEVICE SERI
4. C O 2 4 min Configuration VLAN disabled Speed l000 Mbit sec Duplex full Autonegotiation Enabled Flow Control Device name ID 000000 MAC address 00 50 43 IP address 192 168 0 Loopback module name n Uu nm nm Loopback module MAC address Loopback module IP address ITL 127 IO5 DS 0 UDP destination port 8 UDP source port 8 Elapsed time 0 h 1 min Ihreshold c l n 128 100 256 100 512 100 1024 100 1280 100 1518 100 ca oF oof oo oof oft of of C3 oo Back To Back test results Elapsed time 0 h 0 min Starting frame bunch length 4 2011 4 192 3 frames count send duting thi Threshold 100 0 5 2976190 2 sec 128 1589189 r 2 sec 256 905797 r i2 sec 512 4699272 2 sec 1024 239463 r 2 sec 1280 192307 2 sec 1518 162548 2 sec Frame Loss test results c d H d Elapsed time 0 p Threshold 0 1 E ream 100 ream 90 eam 80 eam TO eam eam 50 eam 40 eam 30 ream 20 ream 10 H OH H H H ED DI GD OGOGO oo O O OF o of oF oF oof oof of ok ooo O O C3 CO CO Ti OF o of oF oof of et ct ct ct et et er et ct ed H n 1 0 00 00 0 5 2 ma B 04 2011 28 04 2011
5. frames The bunch has Length in seconds Fames count in the bunch 15 dependant of Interface speed and frame length Device counts sent and received frames count Is at least one frame 15 lost bunch length reduce by means of frame cont reduction and trial 1s rerun 35 36 If all frames return test 15 rerun Repeat times count In the case of success bunch length increase and trial is rerun This operation repeats again and again narrowing search region When recurrent bunch length change becomes less than precision current result value becomes measurement result Frame loss Percentage of frames that should have been forwarded by a network device under steady state constant load that were not forwarded due to lack of resources Measurement starts with Start speed value in Frame Loss test configuration page This parameter is set in percents of current link speed setting 10 100 1000 Mbit s Device counts sent frames Nsgnt and received back frames Losses are obtained using formula Losses Nnazczgivep 100 96 If losses gt 0 at the first step of the test test stream reduced by 10 at the expense of interframe gap increase and trial 1s rerun In losses are 0 95 trial repeats again In frame loss is not detected measurement stops It is assumed that at all other steps stream 90 80 70 and so on no losses too Latency For store and for
6. items In this case F4 button is used to view all other values which will be displayed in groups of three values after every press of F4 button Page Page selection Fl port setup F2 network setup F3 VLAN setup Type Interface type selection Fl copper F2 optical Mode Built in crossover mode selection for copper cable This allows use both straight and crossed patch cord types for device connection to 13 14 active network equipment Auto mode is recommended Autoneg Autonegotiation and autodetection mode control Recommended value is On Speed Maximum speed limit when autonegotiation 15 enabled Duplex Current duplex mode always enabled Flow control Fl incoming Pause frames are ignored F2 incoming Pause frames are received transmitter makes a pause according to request Network page MAC address ATLAN 1s a standard Ethernet device To set MAC address use functional keys IP address To set IP address enter into edit mode and use numeric keys and cursor keys You also may select address from the list of last used addresses Subnet mask This mask will be used when creating broadcast request for other devices discovery All requests outside subnet are directed to default gateway Gateway Allows or prohibits gateway use Gateway address IP address gateway All requests to devices located outside subnet will be sent to this address VLAN page VLAN lev VLA
7. AL NUMBER Interface tester ATLAN s n Manufacturer representative 43
8. N support level Off no support of virtual network 10 VLAN with one tag 802 10 standard VLANI fields settings are used 2 VLAN with double tagging QinQ VLAN2 is outside tag located close to MAC address VLANI inside tag VLANI ID type for VLANI Possible values are 8100 88A8 9100 9200 9300 It 1 possible to support additional not standard types VLANI priority 3 bit priority field according to 802 1p VLANI id Virtual network number VLAN2 ID type for VLAN 2 Possible values are 8100 88A8 9100 9200 9300 It 1 possible to support additional not standard types VLAN2 priority 3 bit priority field according to 802 1p VLAN 2 id Virtual network number PING Ping 1s a standard utility to test networks It is built on the ICMP protocol Internet Control Message Protocol ATLAN 15 capable receive and handle ICMP requests To starts rending requests setup utility parameters at page Configuration set the cursor at menu item Start and press F1 button Page results must appear on the screen automatically It is possible to return to configuration page by pressing key P Results are displayed in the form of the table Note Internal MCU 15 a low speed device so ping reply time are relative to it s speed therefore this time can not be used as a latency test result This 1s due to relatively low ICMP request processing To measure the precise value o
9. TE aS 40 STORAGE AND TRANSPORTATION eere eee eee eene 42 WARRANTY 42 DEVICE SERIAL NUMBER sisesissccsccsiescesescsvsteassennssestescesessssdesesceaeseeee 43 INTRODUCTION Network tester ATLAN provides performance analysis of various network equipment or network segments for data transmission compatible with Ethernet technology The device is best to use when building setting and maintaining network infrastructure It 1s especially useful when high bandwidth and latency critical services are deployed such as IPTV video on demand and so on ATLAN provides e Testing according to RFC 2544 methodology with direct connection to copper or optical Ethernet interface e Testing over others technologies that using Ethernet standards for equipment connection xDSL WiFi etc e IP Delay Variation Frame jitter according to RFC 3393 e Standard testing utilities ping e Copper cable fault detector e Simple voice communication between devices Reports creation OPERATING CONDITIONS Ambient temperature 20 50 C e Relative air humidity up to 90 at 30 C e Atmospheric pressure 86 106 kPa TECHNICAL PARAMETERS Device power source is four AA NiMh accumulator batteries 1 2 V with 2 3 A H capacity This provides about 4 hours of operation actual time depends on link speed optical module type and screen brightness External 220V AC to 12V DC adapter is used to charge accum
10. affic imitation Averaged result over all latency test frames is used as final result value Minimal and maximal value also registered Jitter IP delay variation This type of measurement is done simultaneously with latency test Latency value change variation is done along both frame routes from main device to looback module and from loopback module to main device This measurement t is done as follows Device A see fig 20 3 sends frames F1 and F2 with interval of T seconds Device B loopback module registers time interval they arrive at its input If latency is not continuous this interval will differ from the starting value of T It 1s even possible for frames to change their order of arrival F2 may arrive earlier and 1 Mentioned operations are repeated several times Then minimum and maximum values are detected Resulting value is a peak to peak value and 1s calculated using following formula IPDV peak to peak IPD V max IPD V min Devices use data exchange to obtain these values therefore when frame loss is present into network it could bi impossible to get these results Try to reduce test speed and retry the measurement in these cases Note RFC2544 are very strict tests According to RFC 2544 throughput test value 1s good 1f NO ONE measurement frames were not 37 38 lost Sometimes 1f equipment loose only one frame at any stream very low or even zero test results are possible When bad result
11. d MDIO MDII MDI2 u MDI3 in parentheses standard tap numbers for corresponding pairs are given An example view of result screen is at figure 17 4 m LDown 12 00 05 Results Test MDIO 1 2 OK length unknown MDI1 3 6 not matched at dist MDI2 4 5 open at dist MDI3 7 8 OK length unknown Fl Results F3 Info F2 Addon Fig 17 4 Cable length measurement for good pairs with additional parameters establishing 1s performed at speed 1000 Mbit s only Link must be established also At figure 17 4 you may note the absence of length value for pairs MDI3 It is because link is down MDII results denote impedance mismatching Distance to this mismatching is very short This 15 likely to be impairment using wires from different pairs At speeds 10 100 Mbit s a standard Time Domain Reflectometry TDR is used for distance to defect detection Cable length can be determined by remote end cable disconnection Do use more advanced DSP method it 1s impossible to establish a link at 1000 Mbit s mode SFP INFORMATION This mode is used for reading values from embedded nonvolatile memory of the module Read 15 done automatically when module 15 29 plugged Please contact us if special field reading is required optical power for ex 19 VOICE COMMUNICATION There is a voice communication function between two ATLAN devices Note This function automatically disables loopback mode This func
12. e 17 1 Transceiver input outputs to connector matching 27 28 At present moment the main 8P8C socket connection standard 1s TIA EIA 568 B which replaced older TIA EIA 568 A Crossover for Crossover 1000 contact First end wire color 10 and 100 Mbit s Mbit s white orange w ereen w green 2 orange green green 3 white green w orange w orange 4 blue blue w brown 5 white blue w blue brown 6 green orange 7 White brown w brown blue 8 brown brown w blue Table 17 2 Crossover cables T568B Note Do not forget your cable may differ from standard Pairs are exchangeable Transmitter output must be connected to receiver input In this case only transceivers are able to establish a link Crossover cables are used to do this Most of Ethernet devices are capable to use MDIX mode 1 e exchange input and output taps on their sockets therefore they will work with straight cable as well crossover Many devices use automatic crossover selection mode Auto MDIX MDI or MDIX 18 17 3 Left both devices are in MDI mode and connected with crossover cable Right straight cable connection right device is into MDIX mode To start the cable test enter the mode set cursor at Test menu item Then press F1 button Start Move cursor to menu item Page and use functional keys F1 F2 F3 to view test results Test 1 performed for every pair they name
13. f latency use test RFC 2544 Latency IP address set IP address enter into edit mode and use numeric keys and cursor keys 15 16 F4 Press this button to select address from the list of last used addresses Data ICMP frame data field size Timeout It is a time the device awaits the reply in milliseconds Use numeric buttons to change current value Press Ok when done You can use lt gt buttons to change active digit Interval Requests send interval in milliseconds TTL Time To Live ICMP frame parameter 11 LOOPBACK MODULE To perform RFC 2544 tests two ATLAN devices are required One of the devices is a sender of the measurement frames the second device make up a loop It receives frames at the far end of the network and sends them back to the sender Any ATLAN device 15 capable to work as a master sender or as a loopback module m X Aneg 12 00 05 Config Discovery IP address 192 168 0 100 Status unknown Loopback name MAC address no link Fl Config F2 D1scov Fig 11 1 Loopback module setup The menu of loopback module is composed of to two pages configuration and discovery results There are several ways to setup the loopback module for testing Enter known device IP address and set the device to mode Loop if it is not in this mode already see current remote device state in the menu item Status e Perform the disc
14. face menu Threshold Used for pass fail verdict check Latency page items description Time Trial length for given frame size Repeats Result averaging count Speed Frames transmission speed at which latency will be measured From Thr put Set test speed obtained from Throughput test results Threshold Used for pass fail verdict check It 1s set by user CURRENT STATUS 2 14 22 Use Start Stop button to quickly enter this mode This mode 15 used for measurement process control m 1 M 12 00 05 12 00 00 00 00 05 Time Tput complete yes B2B in progress FLos order Lat in order Test progress 128 1689189 rep 1 TX 1689189 Rx 1689189 information Start Stop Mm Control menu Fl Start F2 Stop Fig 13 1 Status menu At the top of the screen test start time and test duration are displayed At the middle of the screen test progress 1s displayed Behind short test name its status 1s displayed in order in progress complete aborted and result for pass fail verdict test yes or no Current test progress 1s displayed current test frame transmitted and received frame count current repeat number At the bottom of the screen menu 15 located Start Stop F1 test start F2 test stop RESULTS This mode 15 used for current measurement results display Its menu 1s composed of five pages Throughput B to B Frame loss Latency and Jitter Measureme
15. g TOS DS bits source UDP Use it to set outgoing port UDP header if measurement frame Dest UDP Use it to set incoming port UDP header if measurement frame MAC address Remote device or default gateway MAC address 1s displayed here Error will be displayed here 1f connection to remote device was failed It is possible to enter MAC address manually Throughput page items description Time Trial length in seconds Precision Throughput test stop criteria Repeats Repeats count in every trial Start speed Search start speed It is used to speedup measurements especially in the case of low resulting values Threshold Used for pass fail verdict check 13 Back to Back page items description Start length This 15 the starting length of the measurement frames bunch The exact number of frames in the bunch is dependant of the frame size Precision This 1s a limit of the resulting value change when searching it This test stop criteria 1s given in frames Repeats Repeats count confirmation count of current result before next trial before next change of frames count in the bunch Threshold Used for pass fail verdict check Frame loss page items description Time Trial length of the trials 1n seconds in the next step of the test Starting speed Test start speed Value is measured in percent units 100 is a maximum theoretical connection speed 10 100 1000 Mbits per second See Inter
16. ice It will be used in loopback mode Connect devices to equipment under test Enter menu item Loopback module Perform an ATLAN devices discovery and select one of them Set it into loopback mode by moving cursor at menu item status and pressing F 1 button Make sure that MAC address resolved successfully and loopback mode is set Go to menu item Configuration Set up general test parameters at page General enable all required tests Configure measurement stream UDP ports and priority fields at Stream page Enter loopback device IP address if IP address field was not filled automatically when loopback module was selected Ensure that corresponding MAC address has resolved If second device is out of the same network default gateway MAC address was displayed Do not forget to check access rights to the udp ports of routers and servers in the test Configure certain test parameters Test time 1s dependant of starting speed and precision values Go to menu item Measurement and start the process Use Results item to view current measurement results Use Report creation to create reports and further results processing Throughput The maximum rate at which none of the offered frames are dropped by the device under test Measurement process 1s composed of trials Each trial length 1s given by Time parameter in test menu configuration Device send measurement frames during thi
17. ion indicator A Time 1 Ping Loopback modu le Configuration Configuration Memory Measurement Results Reports creation Statistics Cable test RG45 SFP Information Voice communication Setup PC communication Fig 7 1 Main menu Built in accumulator control will switch of the device when batteries depletes You may control charge level by means of battery picture at the top of the screen 8 GETTING STARTED 8 1 Main menu The device provides a set of functions which can be accessed through main menu Main menu 15 composed of pages and every page 1s composed of items Items are displayed in the form of a list Using V buttons you may change active item which is marked by color inversion By pressing Ok button you may enter into item and return back to main menu by pressing Eso Most of main menu items have it s own menus organized into one ore more pages tabs To select desired page use Page item or use buttons P next page P previous page On menu pages there are lists of various parameters With help of N buttons you may change selected parameter which is marked with test inversion Using functional buttons and and Ok buttons current parameter value can be changed 5 2 Main menu functions list Interface Set up device at physical and communication level Ping send and receive echo requests using ICMP Internet Co
18. l select Driver folder located at CD If driver signing warning appear choose continue setup Then follow driver setup wizard Successful setup message must appear on the screen Additional device must appear in the list of devices when ATLAN device in FW update mode 1s connected to PC S Device Manager e m 7 2 H 5 Keyboards E L _ Mice and other pointing devices B Network adapters HH 1394 Met Adapter 2 o BB Marvell Yukon Gigabit Ethernet 10 100 1000Base T Adapter Copper R 45 a x Ports COM amp LPT E on Communications Port COM 1 zum Communications Port COM zen Printer Port LPT 13 T 8 USB2COM virtual serial port C p Processors m SCSI and RAID controllers Sound video and game controllers H a Storage volumes H System devices F Universal Serial Bus controllers If you use Windows 7 driver setup wizard may not start automatically Do not disconnect you device from PC To setup a driver enter device manager System window Open item Ports COM and LPT Click device USB2COM Virtual Serial Port Go to Driver tab and press Update button Follow wizard Before you start download an update program to your PC To start this program NET Framework 2 0 software components are required You may find it at www microsoft com or driver CD into
19. l vedicts are OK Red one ore more pass fail verdicts are not OK pass fail check disabled CRC error detected Green incoming frame received Green outgoing frame sent 39 21 27 23 40 COMMUNICATION WITH PC The ATLAN device uses USB interface This interface 1s used for measurement result transmission to PC Plug your device to PC with USB cable Turn on the device and enter main menu PC communication USB flash drive must appear in your system You may copy reports to your PC This disc 1s writing protected Use device menu item Erase to cleanup the disk SETUP Use this item to setup date and time You may also set symbolic devices name here This 1s very useful to distinguish devices Some additional settings are also here FIRMWARE UPDATE There is a firmware update feature 1n this device This function allows fast addition of new functions and software problems resolving Visit our website to find available updates USB driver installation 1s required to update firmware Do the following Plug your device to a PC Power the device with wall mount adapter recommended Turn on the device When welcome screen appears press F2 button A A bootloader menu must appear on the screen Enter Update FW item New hardware setup wizard must appear on you computer Reject Windows Update connection and choose the last of available variants choose the place by manua
20. menu is composed of 6 pages General Stream Throughput B to B Back To Back Frame loss Latency To change active page you can use menu item Config its 15 always first or P P buttons General page items description Units Megabits per second or percents 100 15 a transmission speed set in interface setup if another not noted Frame size According to RFC 2544 recommendation or user select This is a physically transmitted frame size without preamble and SFD Start of Frame Delimiter but including CRC User Frame size 15 given by user used with previous item Throughput Enable or disable throughput test B to B Enable or disable back to back test Frame loss Enable or disable frame loss test Latency Enable or disable latency test Verdict Enable or disable Pass Fail verdict 19 20 Stream page items description IP address Loopback module address another ATLAN device loopback mode Measurement stream destination address Use numeric buttons to change current value Press Ok when done You can use lt gt buttons to change active digit F4 Hot list IP address selection If you set remote device into loopback mode this field will be filled automatically TTL IP header Time To Live parameter in measurement frame TTL DS Type Of Service Differentiated service parameter in measurement frame Precedence This field 1s used when settin
21. n TECHNICAL DESCRIPTION AND USER MANUAL ed ETHERNET TESTER ATLAN CONTENTS INTRODUCTION 4 2 OPERATING CONDITIONS 4 3 TECHNICAL PARAMETERS weiss 4 4 SUPPLY CONTENTS 6 5 CONSTRUCTION AND PRINCIPLES OF OPERATION 7 5 1 DEVICE CONSTRUCTION 7 6 SAFETY INFORMATION 9 T PREPARE ere Defui cou 9 S GREETING STAR PED 11 MAIN 11 8 2 MAIN MENU FUNCTIONS LIST cccececcececcececcecececcececcscecscscesescecescececees 11 9 INTE REA CE SETUP inet rei ree vaa Yo gos Cei eo xo eod trees 13 oc P I 15 11 IOOPBACK MODUVULE 2 v eir eg E es ease aub ee esse 17 12 CONFIGURATION 19 13 CURRENT STATUS a a 21 I RTT 22 I5 REPORTS CREATION 23 t6 STATISTICS 26 LL TES 26 IS SEPINEORMIATIQNQN 20 19 VOICE COMMUNICATION ee ee eee ee eee ee eee eee ee eee eee eee oeeoes 30 20 MEASUREMENTS ao 30 20 1 ETHERNET BASICS 30 202 GUAE NUR UE 34 20 3 ALARMS AND EVENTS INDICATORS cccccscececcecsceccccecscececcscscececeecscecs 39 21 22 23 24 25 26 SETUP ase M 40 FIRMWARE UPDA
22. nt results and pass fail verdict are displayed on those pages Pages switching is performed by means of P and P buttons Results are displayed in the form of the table First column is a frame size The second measurement result in selected units see Measurement settings and pass fail verdict result 1f it is enabled You 15 may freely change threshold before and after test pass fail results were reviewed automatically There is the Step item on page Frame loss Use this item to view all the available results measurements with various throughputs 1 12 00 05 Throughput Status complete lt Menu Time 00 01 25 64 128 100 lt q Results 256 100 512 100 1024 100 1280 100 yes 1518 100 yes Fl Throughput F3 Frame loss F2 B to B F4 Latency Figure 16 1 Results menu REPORTS CREATION To make a report you must complete current measurement first The enter file name for report file your save Create a report with given name with help of the first menu item Use main menu item PC communication to transfer report files to PC Use Erase when built in flash disc fills up In the case of error appearance try to copy available report files to PC and perform a full erase using corresponding menu item A report example is given here 23 24 Mesurement report Created 14 35 45 2 Device 5 N 000 Start time 12 55 54 End time 13 00 36 Elapsed time 0 h 8 0 nmm
23. ntrol Message Protocol Loopback module Discovery and setup loopback module operation Configuration Setting up test parameters Configuration memory save and load interface parameters and test parameters Measurement Start and stop measurements progress information test results in short Results View test results Report creation Test report creation using current test results B 12 Statistics Various frame reception statistics Cable Test RG45 Provides copper cable tests SFP information Getting built in SFP module information Voice communication Establish voice communication channel between two ATLAN devices Setup setup date time and some other functions PC communication Communicate with PC for generated report To enter to some items you need to stop current measurement process 9 INTERFACE SETUP m 1 12 00 05 Port Tun copper Mode Auto MDI Autoneg On Speed 1000mMbi Duplex Ful Flow Control Off Fl Port F3 VLAN F2 Network Current button action F1 F2 F3 F4 9 1 Use buttons v to change current active item which is correspond to some parameter At the bottom of the screen the list of possible actions or selection variants are displayed For example pressing F2 button will change active page for network setup In some cases full list of variants has more than for
24. o devices in the same network distinguish each other Frame header contains so called MAC addresses MAC Media Access Control of source device and destination device They must be unique for every Ethernet device Most of applications require bidirectional data transmission In modern networks transmission 1s performed in both directions simultaneously from transmitter to receiver 2 and from transmitter 2 to receiver 1 This method is called full duplex transmission That requires two ATLAN devices to be used for testing Device A generates test frames sequence device B receives it and sends back to device A So this makes possible for device A compare frames count send to network and received back as well as determine frame travel tame over network Throughput estimation method is based on trials to transmit over network the defined data stream Usually test starts with maximum theoretical frame stream If frame loss is detected device reduces stream by half and makes another trial 33 20 2 Get started 34 Check current date and time They must be set valid See Setup main menu item Enter menu item Interface and configure device for your network select interface type plug in SFP module connection speed Note Some switches require Auto negotiation to be disabled Go to page Network Set IP address and subnet mask Set default gateway address if required Repeat that steps for second dev
25. on medium It is connected to equipment with 8 8 SPEC connectors At speeds 10 Mbit s u 100 Mbit s only two twisted pairs are used One of them is used to transmit data from device 1 to device 2 and the second one in reverse direction In 1000 Mbit s mode four pairs are used for bidirectional transmission Every transceiver has and MDI Media Dependent Interface A differential transceiver 1s used for copper connection It 1s connected to twisted pair of wires Built in transceivers are capable select proper signal polarity in automatic manner It is not allowed to connect wires which belong to different pairs to one transceiver It will lead to link fault 1mpossible to establish a link There is an example of wrong connection on figure 17 1 Taps 3 u 6 are related with one transceiver and must be connected to one twisted pair of wires A good connection example is given in figure 17 2 contact COND NA d UN B DD 8 BI_DD 7 _ 6 Bl DC 5 N BI_DC 4 BI DB amp N 1 View from contacts side MDI3 Pair 4 MDI2 Pair 3 Pair 2 MDIO Pair 1 Fig 17 1 INVALID connection Connector 8P8C N N C A O N N View from contacts side MDI3 Pair 4 Pair 2 MDI2 Pair 3 MDIO Pair 1 Fig 17 2 Valid connection IOBASE T 100Base TX 1000Base T BI DA BI DA BI DB BI DC BI DC BI DB BI DD BI DD Tabl
26. or optical module connection Headphones socket Microphone socket SP8C RG 45 socket for copper cable USB socket Power supply connector Fig 5 2 Sockets panel At the opposite side of the case battery compartment is located SAFETY INFORMATION WARNING Optical modules are the sources of invisible laser radiation Do not direct optical sockets eyes or face PREPARE FOR WORK Unpack the device Perform a visual check ensure in the absence of mechanical damages on the device If the devices were stored at low temperatures or high humidity dry it during 24 hours at normal conditions Four NiMh elements are used as device power source When external power supply is connected device is switched to this external source and charge process if required has also started After charge completition device continue to use external supply until it 1s disconnected New accumulators are required 6 10 charge discharge cycles to reach full capacity Turn the device on by pressing ON OFF button two times first time for short time and second time press it and hold until device will power up To turn the device off press the same button and hold it until the device will shut down After startup screen appear on LCD press Ok button or wait for a few seconds As a result main menu will be displayed fig 7 1 10 Battery voltage indicator Link speed Duplicate IP address detected Measurement indicator Active voice communicat
27. overy operation of ATLAN devices into current subnet The device will use subnet mask to generate a broadcast request see interface setup network e tis possible to enable or disable loopback at remote device by manual See item Loopback the menu Setup of main menu 17 18 Menu items description Page Page selection F1 Configuration F2 Discovery results Remote ATLAN devices discovery F1 Start F2 Stop IP address F1 Use numeric buttons to change current value Press Ok when done You can use lt gt buttons to change active digit F4 Hot list IP address selection Status F1 Enable loop mode on remote device F2 Disable loop mode on remote device F4 refresh remote device status Loopback module name To make work a little bit easier you can give a name to the device This name will be displayed when you connect to this device See Setup menu description for additional information how to change this name MAC address Here MAC remote module or default gateway MAC address is displayed Error will be displayed here 1f connection to remote device was failed It is possible to enter MAC address manually Note In the case of remote device MAC address detection and loop mode invocation without errors its IP MAC addresses were automatically copied to RFC 2544 configuration at Stream page 12 CONFIGURATION This item is used to configure RFC 2544 tests set Configuration
28. represented schematically at fig 20 1 There 1s no transition at the beginning Then frame Nel was transmitted mandatory inter frame gap and frame Ne2 then and ifg again and so on Or at fig 20 2 1s 1n more details Ethernet frame LI LI LI LI LT LJ LI LJ LI Fig 20 2 Frame transmission and clock signal one byte transmission time Note Sfd Crc are the sequence of bytes One data byte or ifg symbol 15 transmitted during 1 clock period Fig 20 3 Important elements of the most Ethernet networks are switches and routers At fig it denoted as K The join together various network devices A B They have a number ports as a rule A switch at figure 20 3 has 4 ports Each frame which device A will transmit to device B goes through the route A Tx gt gt gt gt Tx gt gt B Rx The performance of this network is dependant of Maximum device frame rate transmission Maximum B device reception capability of these frames The capability of device to receive frames at port Nel and retransmit them thru port Ne3 If we assume that devices A and B are capable receive and transmit frames at maximum theoretical speed with minimum possible inter frame gap we a able to test unknown performance of device K at maximum speed RFC 2544 methodology and ATLAN devices are developed to do such task Unique network addresses are used to allow tw
29. reproducibility 1s detected increase repetition parameter in tests configuration Note when tested streams are close to maximum theoretical link speed minimum interframe gap buffer overflow problem may appear This 1s due to frequency difference of transmitter and receiver Form example if generator transmits 125001000 bytes of data per 1 second loopback module receives them but retransmits them back with the speed of 125000500 bytes per 1 second Even so small frequency difference causes 500 excess bytes appearance in loopback module Sooner or later buffer overflows and one frame will be lost This 1s result in understated Throughput test result 98 4 for example instead of 100 You may try to resolve this problem by enabling speedup into Setup menu in loopback module This enables tests frames transmission from loopback module with reduced interframe gap of 1 T instead of 12 T NOTE this solution 15 not conformed to Ethernet network standards and may not work with some equipment Modern equipment usually works well into under these conditions 20 3 Alarms and events indicators These indicators allow user to control device state Indicator Laser Link Loop lest Result Error Eventl Event2 Application Red SFP module laser is active Green link established Red link lost Green this device 15 in loopback mode Green Device is in active test mode Green One or more pass fai
30. s time and receive them back It also counts them sent frames count will depend of frame size and send interval between them Inter frame gap send interval change lets frame stream data transmission speed 100 stream is equivalent to stream with minimal interframe gap Measurement starts with Start speed starting speed Even if one frame lost frame transmission interval is reduced at the expense of interframe gap increase and test trial 1s rerun In no frame loss detected trial rerun Repeat times with current interval This is to exclude occasional success trials In the case of success send interval is reduced speed increase and next trial is performed Trials repeats again and again narrowing result search region Every success trial tells us that resulting value not smaller then current and every failed trial that not larger then current An interval between minimum and maximum 15 divided by two at every step and next trial 15 performed When recurrent stream speed change becomes less than precision parameter value current value gives us a measurement result Note read note at the end of the paragraph Back to Back Fixed length frames presented at a rate such that there 15 the minimum legal separation for a given medium between frames over a short to medium period of time starting from an idle state Device under FIIFI FIF e gt Measurement starts from sending the bunch of
31. tion use simple UDP frames for voice transmission Signal buffering is minimal so into networks with large frame losses and frames reordering some voice distortions are possible Measurement IP and UDP settings are used for voice communication Menu items description IP address Communication partner device address Signal Possible values Disabled tone signal 1000 Hz microphone signal We recommend use tone signal for headset check Mic sense Microphone sensitivity Volume Earphones volume setting MAC address MAC resolve result Default gateway address can be displayed here To establish voice communication enter IP address and select signal type A request will be sent to this address If remote device receive it a sound signal will be issued for operator three short beeps IP address field will be filled with request sender address automatically To establish communication far end device user must also select signal type 20 MEASUREMENTS 20 1 Ethernet basics Let s try to understand Ethernet networks basics Some details were reduced intentionally A detailed description you may find in IEEE 802 3 standards set 30 Cable Each Ethernet networks compatible device has one or more transceivers transmitter receiver Tx and Rx in short Data transmission 1s performed over cable line copper or optical fiber in the form of byte stream 1 serial transmission One byte 15 an information meas
32. ulators as well as device powering Frame size bytes According to RFC2544 VLAN Support Cable tests copper interface 8P8C connector Cable length estimation Copper 8P8C RG45 Optical Duplex 64 128 256 512 1024 1280 1518 custom Levels 1 and 2 QinQ Open short impedance mismatching Distance to defect estimation Copper interface in 1000 Mbit s mode 10 Mbit s 100 Mbit s 1000 Mbit s SFP module 1000 Mbit s full 4 SUPPLY CONTENTS ATLAN Power adapter 12 V Patchcord 5 cat User Manual PC CD with user manual and driver software Soft case PC USB cable 1 1 1 1 5 CONSTRUCTION AND PRINCIPLES OF OPERATION 5 1 Device construction Device enclosed in aluminum shock resistant case On the front panel of the device fig 5 1 are located Alarms and events indicators Graphic LCD display with backlight Power button Functional buttons F1 F2 F3 F4 Navigation buttons left right up down Ok Esc Instant switch to control mode button Fast menu pages switching buttons P u P Additional buttons M1 M2 Charge process indicator red Power indicator green Error Result Laser L Event Link Event 1 Figure 5 1 Front panel On the sockets panel of the device fig 5 2 are located from left to right SFP socket f
33. urement unit equal to 8 eight bits One bit is a smallest possible information unit Bytes are transmitted with defined speed This speed sets the theoretical speed limit of data transmission system For example at link speed of 1000 Mbits s one data byte is transmitted for T 8 nanoseconds 1 ns it 1s a one million part of a second Every byte transmission time 1s fixed Continuous byte transmission composes a frame sometimes called packet Frame is the only form of data transmission serial transmission of a few tenths of bytes To determine frame start special marker 1s used It has a form of special sequence of bytes sfd Start of Frame Delimiter Receiver uses this marker to synchronize with transmitter for subsequent data frame bytes reception Maximum and minimum frame lengths are limited Frames must not be transmitted continuously I e it is prohibited to transmit next frame immediately after the end of current frame transmission It 15 required make a pause so called minimum interframe gap Maximum interframe gap not limited It is equivalent to transmission absence Inter Frame Gap ifg Frame Ne 1 Frame Ne 2 Fig 20 1 Frames transmission Minimum ifg length equals to 12 T see T definition above and equivalent to 12 data bytes transmission Along with frame start delimited special byte sequence is transmitted at the end of each frame CRC Cyclic Redundancy Check 31 22 Data transmission
34. ward devices The time interval starting when the last bit of the input frame reaches the input port and ending when the first bit of the output frame 1s seen on the output port For bit forwarding devices The time interval starting when the end of the first bit of the input frame reaches the input port and ending when the start of the first bit of the output frame is seen on the output port Measurement 15 done at some frames transmission rate Recommended test speed is Throughput test result speed E 1 maximum possible speed with no frame loss Some of test frames are marked with special label This frames travel time 15 controlled from first device towards loopback module and back from loopback module and first device If network segment or network equipment has significant frames loss frames with latency labels are lost too This leads to large latency values We recommend reduce stream speed at which stream 15 measured Do not set test stream speed too small One of the basis principles of RFC 2544 testing 15 testing under heavy load E 1 into conditions close to real live environment Latency measurement frames are inserted into the middle of trial stream For example if Irial length is 1 second Time item into latency test configuration standard data stream is sent at defined speed during 0 5 seconds then a few latency measurement frames are send and during 0 5 seconds standard frames are sent for real tr
Download Pdf Manuals
Related Search