HP Switch Series (Comware V5) Troubleshooting Guide

Transcription

1 HP Switch Series (Comware V5) Troubleshooting Guide Copyright 2013 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. thing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein. Part number:

2 Contents General troubleshooting procedures 1 Obtaining diagnostic information 1 Obtaining other information 2 Checklist for deployment 2 Troubleshooting hardware 7 MPU reboot failure 7 Symptom 7 Troubleshooting flowchart 7 Solution 8 Operating power supply failure 8 Symptom 9 Solution 9 Newly-installed power supply failure 9 Symptom 9 Solution 9 Fan tray failure 10 Symptom 10 Solution 10 Related commands 11 Troubleshooting system management 11 Temperature alarming 11 Symptom 11 Troubleshooting flowchart 12 Solution 12 Related commands 13 Troubleshooting ports 13 10/100/1000Base-T copper port fails to go up 13 Symptom 13 Troubleshooting flowchart 14 Solution /1000-Mbps SFP fiber port fails to go up 15 Symptom 15 Troubleshooting flowchart 16 Solution Gigabit XFP fiber port fails to go up 18 Symptom 18 Troubleshooting flowchart 19 Solution Gigabit SFP+ fiber port fails to go up 21 Symptom 21 Troubleshooting flowchart 22 Solution GE QSFP+ fiber port fails to go up 24 Symptom 24 Troubleshooting flowchart 25 Solution GE CFP fiber port fails to go up 26 i

3 Symptom 26 Troubleshooting flowchart 27 Solution 28 Error frames (for example, CRC errors) on a port 28 Symptom 28 Troubleshooting flowchart 29 Solution 29 Failure to receive packets 31 Symptom 31 Troubleshooting flowchart 31 Solution 31 Failure to send packets 33 Symptom 33 Troubleshooting flowchart 33 Solution 33 Related commands 34 Troubleshooting IRF 35 IRF fabric establishment failure 35 Symptom 35 Troubleshooting flowchart 36 Solution 37 IRF split 38 Symptom 38 Troubleshooting flowchart 39 Solution 39 BFD MAD failure 40 Symptom 40 Troubleshooting flowchart 41 Solution 41 LACP MAD failure 43 Symptom 43 Troubleshooting flowchart 44 Solution 44 Related commands 45 Troubleshooting QoS and ACL 46 ACL application failure for unsupported ACL rules 46 Symptom 46 Troubleshooting flowchart 47 Solution 47 ACL application failure for insufficient resources 47 Symptom 47 Troubleshooting flowchart 48 Solution 48 ACL application failure without an error message 49 Symptom 49 Troubleshooting flowchart 49 Solution 49 Packet loss or forwarding failure 50 Symptom 50 Troubleshooting flowchart 51 Solution 51 Related commands 53 ii

4 General troubleshooting procedures This chapter describes how to obtain information for troubleshooting problems. This document is not restricted to specific software or hardware versions. Obtaining diagnostic information Diagnostic information is important for locating and solving problems. You can execute the display diagnostic-information command to obtain diagnostic information. HP recommends that you execute the display diagnostic-information command over Telnet instead of the console port because information collection through the console port (9600 bps) takes a long time. Information collection on an IRF fabric takes more time than on a single device. To obtain diagnostic information: <Sysname> display diagnostic-information Save or display diagnostic information (Y=save, N=display)? [Y/N]:y Please input the file name(*.diag)[flash:/default.diag]:aa.diag Diagnostic information is outputting to flash:/aa.diag. Please wait... Save succeeded. The following describes the output information above: save or display diagnostic information (Y=save, N=display)? [Y/N]: This prompt asks you whether to save diagnostic information into a.diag file in the flash memory. If the free space of the flash memory is larger than 10 MB, HP recommends that you enter y to save diagnostic information into a.diag file. After you enter y, the following prompt appears: Please input the file name(*.diag)[flash:/default.daig]: Enter a name for the.diag file at the prompt. If you press Enter, the default name default.diag is used. You can enter a name to differentiate between different.diag files. If the name you entered already exists, the following prompt appears: The file already exists, overwrite it? [Y/N] If you enter y, the new file overwrites the old file. If you enter n, the system returns to the view in which you executed the display diagnostic-information command. You need to re-execute the display diagnostic-information command and enter a new name for the.diag file. Please wait... The system keeps printing dots during saving the diagnostic information. If a fault occurs, the interval between dots will increase, but it will not exceed 2 minutes. After the system saves the diagnostic information, you can execute the dir command in user view to verify whether the diagnostic file exists in the flash memory. <Sysname>dir Directory of flash:/ 0 -rw Jun :37:42 startup.cfg 1 drw- - Sep :03:06 patch rw May :07:13 system.xml 1

5 3 -rw Aug :59:51 mpu.btw 4 -rw May :07:03 config.cwmp 5 drw- - Apr :47:34 seclog 6 -rw May :59: cmw520-r1208.bin 7 -rw Aug :36: cmw520-r1208.bin 8 -rw Jan :44:36 lsqsrp2xb05500.btw 9 drw May :05:15 default.diag If the diagnostic file is larger than bytes and the saving time is correct, the saving operation is successful. If the diagnostic file has a size of 0 (-1) or the saving time is incorrect, the saving operation failed, and you need to configure the system to print the diagnostic information on the console. If the flash memory has no more space during the saving process, the system prints the exceeding diagnostic information on the console. You can use FTP to download the diagnostic file to a PC and send the file to HP Support. If you enter n at the prompt "save or display diagnostic information (Y=save, N=display)? [Y/N]:", the system prints all diagnostic information on the console. Before you select n, enable information capture on the HyperTerminal or Telnet window. If you are using the console port, the information collection takes about 20 minutes. If you are using Telnet, the information collection takes about 3 minutes. After you obtain the diagnostic information, send the file to HP Support. Obtaining other information In addition to diagnostic information, the following information is also helpful for troubleshooting: LED state information, such as operation and alarm LEDs, power LEDs, fan LEDs, and port LEDs. Operation information about other relevant devices, configuration information, and log files. Your opinions on this problem. Measures taken on site and the results. Solution to the problem if the problem has been solved. Checklist for deployment The following checklist serves as a deployment guide to help you eliminate potential configuration errors at different deployment sites. Select items according to your deployment environment. Table 1 Checklist Item Sub-item Command or method Result Remarks Environment and card hardware status Environment Fan display environment display fan t related t related The temperature of all MPUs and interface cards must be lower than 70 C (158 F). The fans must be operating correctly. 2

6 Item Sub-item Command or method Result Remarks Power supply display power t related The power supplies must be operating correctly. (Evaluate power backup by referring to the power and system power consumption.) LED Examine the status of the RUN LEDs and alarm LEDs on all cards. t related The RUN LED flashes slowly, and the alarm LED is off. Card operating status display device t related All service cards must be operating correctly, and the MPUs are in active and standby states. Active and standby MPUs Are the software versions of the active and standby MPUs consistent? Does the standby MPU have a configuration file? display boot-loader dir slot# t related t related Make sure the software versions of the active and standby MPUs are consistent. If no configuration file exists, execute the save command to save the configuration file. CPU usage Does the CPU usage keep changing between 10% and 60% or stay at a high level (the CPU usage of the MPU or service cards exceeds 60%)? Execute the display cpu command repeatedly. t related Execute the debug ip packet command to view the packets delivered to the CPU and analyze the cause. Memory usage Does the memory usage of the MPU and service cards exceed 60%? display memory slot t related If the memory usage exceeds 60%, execute the display memory command to view memory usage and troubleshoot the module that occupies the most memory. Port Is the port operating in half-duplex mode? display interface brief t related For example, if a port is operating in half-duplex mode, verify that the configurations on the two ends are consistent. Is flow control enabled on the port when not necessary? Check the configuration to see if flow control is enabled. t related Use the undo flow control command to disable flow control on the port. 3

7 Item Sub-item Command or method Result Remarks Are large numbers of error packets generated in the outbound/inbound direction of the port? Use the display interface command to verify that a large number of errors are generated and that the number keeps increasing. t related Do the following: 1. Examine link quality and the optical-electrical converter. 2. Verify that the configurations on the two ends are consistent. Do the following: Does the port change to up/down frequently? display logbuffer t related 1. Examine the link and the optical-electrical converter. 2. Verify that the optical power of the GE port has reached the threshold value. 3. Verify that the configurations on the two ends are consistent. Are the configurations on the local and peer fiber ports consistent? display current interface t related To connect an HP device to a device of another vendor, HP recommends that you set consistent fiber port rate and duplex mode on the two ends. Fiber port Does CRC error occur on the fiber port? Is the number of CRC errors increasing? display interface t related Verify that the optical power has reached the threshold value. To resolve this issue, replace the transceiver module or pigtail fiber, or clean the connector of the transceiver module. Is the undo port trunk permit vlan 1 command configured on the trunk port? display current interface t related If GVRP is configured for the system and the undo port trunk permit vlan 1 command is configured for the trunk port, configure the PVID of the trunk port as the ID of a VLAN permitted by the trunk port. Trunk port configurations Is the PVID of the trunk port consistent with the peer port? display current interface t related The VLANs permitted by the trunk ports and the PVIDs of the trunk ports connecting the two devices are consistent. Are the VLANs to which the port is assigned consistent with the peer port? display current interface t related The VLANs permitted by the trunk ports connecting the two devices are consistent. 4

8 Item Sub-item Command or method Result Remarks Are the ports connecting two devices configured as a trunk port and an access port? display current interface t related Configure the same link type for the ports as needed. Does a loop occur in VLAN 1? Use the display interface command to verify that the trunk ports of all devices are assigned to VLAN 1. t related Remove the ports from VLAN 1 as needed. Timeout factor display current-configuration t related Verify that the stp timer-factor command is configured. If not, configure a timeout factor in the range of 5 to 7 to enhance the stability of STP. Is the port on the device connected to the PC configured as an edge port? Use the display current interface command to examine the port configurations. If an edge port is configured, stp edged-port enable is displayed. t related HP recommends that you configure the port on the device connected to the PC as an edge port or disabling STP on the port. To prevent state change of the ports from interrupting STP calculation, disable STP on the ports connected to the devices that do not support STP. STP Can the HP device running MSTP/STP/RSTP communicate with the Cisco device running PVST+? Verify that STP calculation on each device is correct. t related To avoid communication between the HP device running MSTP/STP/RSTP and the Cisco device running PVST+, HP recommends that you change the connection mode to Layer 3 connection. Are there too many overlapping paths among the topologies of different MSTIs? Use the display current interface command to examine port configurations. t related Plan VLANs and VLAN-to-instance mappings according to your network environment in order to do the following: Forward traffic of various VLANs along different paths. Avoid too many overlapping paths among the topologies of different MSTIs. 5

9 Item Sub-item Command or method Result Remarks Does a TC attack exist to cause frequent STP status changes on the port? Use the display stp tc and display stp history commands to examine the statistics of TC/TCN BPDUs received and sent on the port and the historical port role calculation information. t related Make sure the stp edged-port enable command is configured on the port of the device connected to the PC or otherwise STP is disabled. Disable STP on the ports connected to the devices that do not support STP. VRRP Is the handshake interval set to 3 seconds? Are the handshake intervals of the two ends consistent? display vrrp t related Change the handshake interval to 3 seconds if the number of VRRP groups is less than five. If five or more VRRP groups exist, assign three or five VRRP groups into one group, and configure the handshake interval as 3 seconds, 5 seconds, and 7 seconds for each group. Are the router IDs of two devices the same? display ospf peer t related A router ID conflict might result in a route learning error. To restart route learning, you must modify the router ID and execute the reset ospf process command. OSPF Are there a lot of errors from the output of the display ospf error command? Does severe route flapping occur? display ospf error Use the display ip routing-table statistics command to examine the number of added and deleted routes. t related t related If a large amount of OSPF errors exist and the number continues to increase, execute the debugging ospf event command for further analysis. If route flapping occurs, locate the flapping route and the source device to analyze the cause. You can use the display ospf lsdb command multiple times to view the age of routes and locate the flapping route. Is the OSPF status stable? display ospf peer t related View the up time of the OSPF neighbor. ARP Are there a lot of ARP entry conflicts? display logbuffer t related Verify that the IP address of the host does not conflict with other IP addresses. If a conflict occurs, modify the IP address of the host. 6

10 Item Sub-item Command or method Result Remarks Route Is the default route correct? Is there any routing loop? Trace the path to a nonexistent network ( , for example) by using the tracert command to check routing loops. Use the debug ip packet command to check if packets with TTL 0 or 1 exist. t related If a routing loop exists, verify the configurations of involved devices. Adjust the route to eliminate the loop. If TTL exceeded packets are received, verify that the corresponding network route is correct. Troubleshooting hardware This section provides troubleshooting information for common hardware problems. NOTE: This section describes how to troubleshoot MPUs, LPUs, power supplies, and fan trays. To troubleshoot transceiver modules, ports, and temperature alarms, see "Troubleshooting system management" and "Troubleshooting ports." MPU reboot failure Symptom An MPU fails to reboot. Troubleshooting flowchart 7

11 Figure 1 Troubleshooting MPU reboot failure Solution To resolve the problem: 1. Verify that the system software image on the MPU is correct. a. Log in to the MPU through the console port and restart the switch. If the system reports that a CRC error occurs or that no system software image is available during the BootWare loading process, reload the system software image. b. Verify that the system software image in the flash memory is the same as the one on the server. If no system software image is available in the flash memory, or if the image is different than the one on the server, reload the system software image. Then set the reloaded system software image to the current system software image. The system software image in the flash memory is automatically set to the current system software image during the BootWare loading process. 2. Verify that the MPU memory is running correctly. Reboot the MPU, and immediately press CTRL+T to detect the memory. If a memory fault is detected, replace the MPU. 3. Verify that no error is reported during the BootWare loading process. If there are still errors reported during the BootWare loading process, identify the faulty module and verify that the MPU is installed securely. If the MPU is not securely installed, remove and reinstall the MPU. If the MPU is installed securely, replace the MPU. 4. If the problem persists, contact HP Support. Operating power supply failure 8

12 Symptom Solution A trap is generated indicating that an operating power supply has failed. To resolve the problem: 1. Execute the display power command to display power supply information. <HP> display power Chassis 1: Power 1 State: Absent Power 2 State: rmal Chassis 2: Power 1 State: rmal Power 2 State: Absent If the power supply is in Absent state, go to step 2. If the power supply is in Fault state, go to step Remove and reinstall the power supply to make sure the power supply is installed correctly. Then, execute the display power command to verify that the power supply has changed to rmal state. If the power supply remains in Absent state, replace the power supply. 3. A power supply might run into Fault state when it operates continuously at high temperatures or when it is faulty. a. Verify that the power supply surface is clean. If there is dust accumulated on the power supply, remove the dust. Then remove and reinstall the power supply. Execute the display power command to verify that the power supply has changed to rmal state. If the power supply remains in Fault state, go to step b. b. Install the power supply into an empty power supply slot. Then execute the display power command to verify that the power supply has changed to rmal state in the new slot. If the power supply remains in Fault state, replace the power supply. 4. If the problem persists, contact HP Support. Newly-installed power supply failure Symptom Solution A newly-installed power supply fails. To resolve the problem: 1. Execute the display power command to display power supply information. <HP> display power Chassis 1: Power 1 State: Absent Power 2 State: rmal Chassis 2: 9

13 Power Power 1 State: rmal 2 State: Absent If the power supply is in Absent state, go to step 2. If the power supply is in Fault state, go to step A newly-installed power supply might run into Absent state when it is not securely installed. a. Remove and reinstall the power supply to make sure the power supply is installed securely. Then execute the display power command to verify that the power supply has changed to rmal state. If the power supply remains in Absent state, go to step b. b. Remove and install the power supply into an empty power supply slot. Then execute the display power command to verify that the power supply has changed to rmal state in the new slot. If the power supply remains in Absent state, go to step Remove and install the power supply into an idle power supply slot. Then execute the display power command to verify that the power supply has changed to rmal state in the new slot. If the power supply remains in Fault state, go to step If the problem persists, contact HP Support. Fan tray failure Symptom Solution An operating fan tray or a newly-installed fan tray fails. To resolve the problem: 1. Execute the display fan command to display the operating states of the fan tray. <HP> display fan Chassis 1: Fan 1 State: rmal Chassis 2: Fan 1 State: rmal If the fan tray is in Absent state, go to step 2. If the fan tray is in Fault state, go to step Remove and reinstall the fan tray to make sure the fan tray is securely installed. Then execute the display fan command to verify that the fan tray has changed to rmal state. If the fan tray remains in Absent state, replace the fan tray. 3. Execute the display environment command to display temperature information. If the temperature continues to rise, put your hand at the air outlet to verify that there is air being exhausted from the air outlet. If there is no air being exhausted from the air outlet, remove and reinstall the fan tray. Then execute the display fan command to verify that the fan tray has changed to rmal state. If the fan tray remains in Fault state, replace the fan tray. If there is no new fan tray, power off the switch to avoid damage caused by high temperatures. If there are cooling measures to maintain the switch operating temperature below 60 C (140 F), the switch can be used temporarily. 4. If the problem persists, contact HP Support. 10

14 Related commands This section lists the commands that you might use for troubleshooting the hardware. Command dir display boot-loader display environment display fan display logbuffer display power Description Displays information about files and directories. Displays current configuration files and system software images. Displays temperature information. Displays the operating states of the fan tray. Displays the state of the log buffer and the log information in the log buffer. Displays power supply information. Troubleshooting system management This section provides troubleshooting information for common system management problems. Temperature alarming Symptom Temperature alarms occur. 11

15 Troubleshooting flowchart Figure 2 Troubleshooting temperature alarming Solution To resolve the problem: 1. Identify whether the device temperature or the ambient temperature is too high. If the ambient temperature is too high, lower the temperature by adding air conditioners or taking other heat dissipation measures. If the device temperature is too high, go to step Use the display fan command to verify that the fan tray is operating correctly. If the system displays "Fault," see HP Switch Series Installation Guide to resolve the problem. 3. Verify that the air filters are clean. If they are not, clean them. 4. Use the temperature-limit command to set the temperature alarm thresholds. You can use the display environment command to identify whether the temperature alarm thresholds are set successfully. If they are not, replace the card. 12

16 If they are but temperature alarms still occur, contact HP Support. Related commands This section lists the commands that you might use for troubleshooting system management. Command display environment display fan temperature-limit Remarks Displays temperature information, including the current temperature and the temperature alarm thresholds. Displays the operating status of all fans on the switch. Sets temperature alarm thresholds. Troubleshooting ports This section provides troubleshooting information for common port problems. 10/100/1000Base-T copper port fails to go up Symptom A 10/100/1000Base-T copper port cannot go up. 13

17 Troubleshooting flowchart Figure 3 Troubleshooting link up failure on a port A port failed to go up Speed/duplex match on local and peer port? Configure matching speed/duplex Network cable correct? Replace network cable Local port operating correctly? Replace local port Peer port operating correctly? Replace peer port Contact HP Support End Solution To resolve the problem: 1. Verify that the speed and duplex mode of the local port match the speed and duplex mode of the peer port: 14

18 a. Execute the display interface brief command to examine whether the speed and duplex mode of the port match the speed and duplex mode of the peer port. b. If they do not match, use the speed command and the duplex command to set the speed and duplex mode for the port. 2. Replace the network cable with a new one to verify that the network cable is in good condition. 3. Replace the local port with a new one (on a card of the same type, if possible) to verify that the local port is operating correctly. 4. Replace the peer port with a new one (on a card of the same type, if possible) to verify that the peer port is operating correctly. 5. If the problem persists, contact HP Support. 100/1000-Mbps SFP fiber port fails to go up Symptom A 100/1000-Mbps SFP fiber port cannot go up. 15

19 Troubleshooting flowchart Figure 4 Troubleshooting link up failure on a port A port failed to go up Speed/duplex match on local and peer port? Configure matching speed/duplex Speed/duplex match on transceiver module and port? Configure matching speed/duplex Transceiver module correct? Replace transceiver module Fiber correct? Replace fiber Local port operating correctly? Replace local port Peer port operating correctly? Replace peer port Contact HP Support End Solution To resolve the problem: 16

20 1. Verify that the speed and duplex mode of the local port match the speed and duplex mode of the peer port: a. Execute the display interface brief command to examine whether the speed and duplex mode of the port match the speed and duplex mode of the peer port. b. If they do not match, use the speed command and the duplex command to set the speed and duplex mode for the port. 2. Verify that the speed and duplex mode of the port match the speed and duplex mode of the transceiver module: a. Execute the display interface brief command to examine whether the speed and duplex mode of the port match the speed and duplex mode of the transceiver module. b. If they do not match, use the speed command and the duplex command to set the speed and duplex mode for the port. 3. Verify that the transceiver module is operating correctly: a. Execute the display transceiver alarm interface command to examine the alarms present on the transceiver module. The device displays ne if no error occurs. The device displays alarms if the transceiver module fails or the type of the transceiver module does not match the port type. b. Use an optical power meter to verify that the Tx power and Rx power of the transceiver module are stable and are within the correct range. c. Execute the display transceiver interface command to verify that the wavelength and transmission distance of the local transceiver module are consistent with the wavelength and transmission distance of the peer transceiver module. [HP] display transceiver interface ten-gigabitethernet 1/3/0/15 Ten-GigabitEthernet1/3/0/15 transceiver information: Transceiver Type : 1000_BASE_SX_SFP Connector Type : LC Wavelength(nm) : 850 Transfer Distance(m) : 550(50um),270(62.5um) Digital Diagnostic Monitoring : YES Vendor Name : HP Ordering Name : SFP-GE-SX-MM850-A d. If the transceiver module is not operating correctly, replace it with a new HP transceiver module that matches the fiber port. For more information about transceiver modules, see related installation guides. 4. Replace the fiber with a new one to verify that the fiber is in good condition. 5. Replace the local port with a new one (on a card of the same type, if possible) to verify that the local port is operating correctly. 6. Replace the peer port with a new one (on a card of the same type, if possible) to verify that the peer port is operating correctly. 7. If the problem persists, contact HP Support. 17

21 10-Gigabit XFP fiber port fails to go up Symptom A 10-Gigabit XFP fiber port cannot go up. 18

22 Troubleshooting flowchart Figure 5 Troubleshooting link up failure on a port Solution To resolve the problem: 19

23 1. Verify that the speed and duplex mode of the local port match the speed and duplex mode of the peer port: a. Execute the display interface brief command to examine whether the speed and duplex mode of the port match the speed and duplex mode of the peer port. b. If they do not match, use the speed command and the duplex command to set the speed and duplex mode for the port. 2. Verify that the speed and duplex mode of the port match the speed and duplex mode of the transceiver module: a. Execute the display interface brief command to examine whether the speed and duplex mode of the port match the speed and duplex mode of the transceiver module. b. If they do not match, use the speed command and the duplex command to set the speed and duplex mode for the port. 3. Verify that the transceiver module is operating correctly: a. Execute the display transceiver alarm interface command to examine the alarms present on the transceiver module. The device displays ne if no error occurs. The device displays alarms if the transceiver module fails or the type of the transceiver module does not match the port type. b. Use an optical power meter to verify that the Tx power and Rx power of the transceiver module are stable and are within the correct range. c. Execute the display transceiver interface command to verify that the wavelength and transmission distance of the local transceiver module are consistent with the wavelength and transmission distance of the peer transceiver module. [HP] display transceiver interface ten-gigabitethernet 1/3/0/15 Ten-GigabitEthernet1/3/0/15 transceiver information: Transceiver Type : 10G_BASE_LR Connector Type : LC Wavelength(nm) : 1310 Transfer Distance(km) : 10(SMF) Digital Diagnostic Monitoring : YES Vendor Name : FINISAR CORP. Ordering Name : XFP-Lx10-SM1310 d. If the transceiver module is not operating correctly, replace it with a new HP transceiver module that matches the fiber port. For more information about transceiver modules, see related installation guides. 4. Verify that the fiber matches the transceiver module. If they do not match, replace the fiber with a new one that matches the transceiver module. 5. Replace the local port with a new one (on a card of the same type, if possible) to verify that the local port is operating correctly. 6. Replace the peer port with a new one (on a card of the same type, if possible) to verify that the peer port is operating correctly. 7. If the problem persists, execute the display diagnostic-information command to save the diagnostic information, and contact HP Support. <HP> display diagnostic-information Save or display diagnostic information (Y=save, N=display)? [Y/N]:Y 20

24 10-Gigabit SFP+ fiber port fails to go up Symptom A 10-Gigabit SFP+ fiber port cannot go up. 21

25 Troubleshooting flowchart Figure 6 Troubleshooting link up failure on a port 22

26 Solution To resolve the problem: 1. Verify that the speed and duplex mode of the local port match the speed and duplex mode of the peer port: a. Execute the display interface brief command to examine whether the speed and duplex mode of the port match the speed and duplex mode of the peer port. b. If they do not match, use the speed command and the duplex command to set the speed and duplex mode for the port. 2. Verify that the speed and duplex mode of the port match the speed and duplex mode of the transceiver module: a. Execute the display interface brief command to examine whether the speed and duplex mode of the port match the speed and duplex mode of the transceiver module. b. If they do not match, use the speed command and the duplex command to set the speed and duplex mode for the port. 3. Verify that the local and peer ports are operating correctly: a. Use a 10-Gigabit SFP+ cable to directly connect the local port and another 10-Gigabit SFP+ fiber port of the same card. An SFP+ cable is suitable for short connections. b. If the local port can go up, replace the peer port with a new one (on a card of the same type, if possible) to verify that the peer port is operating correctly. c. If the local port cannot go up, replace the local port with a new one (on a card of the same type, if possible) to verify that the local port is operating correctly. 4. Verify that the transceiver module is operating correctly: a. Execute the display transceiver alarm interface command to examine the alarms present on the transceiver module. The device displays ne if no error occurs. The device displays alarms if the transceiver module fails or the type of the transceiver module does not match the port type. b. Use an optical power meter to verify that the Tx power and Rx power of the transceiver module are stable and are within the correct range. c. Execute the display transceiver interface command to verify that the wavelength and transmission distance of the local transceiver module are consistent with the wavelength and transmission distance of the peer transceiver module. [HP] display transceiver interface Ten-GigabitEthernet 1/3/0/15 Ten-GigabitEthernet1/3/0/15 transceiver information: Transceiver Type : 1000_BASE_SX_SFP Connector Type : LC Wavelength(nm) : 850 Transfer Distance(m) : 550(50um),270(62.5um) Digital Diagnostic Monitoring : YES Vendor Name : HP Ordering Name : SFP-GE-SX-MM850-A d. If the transceiver module is not operating correctly, replace it with a new HP transceiver module that matches the fiber port. For more information about transceiver modules, see related installation guides. 23

27 5. Verify that the fiber matches the transceiver module. If they do not match, replace the fiber with a new one that matches the transceiver module. 6. If the problem persists, execute the display diagnostic-information command to save the diagnostic information, and contact HP Support. <HP> display diagnostic-information Save or display diagnostic information (Y=save, N=display)? [Y/N]:Y 40-GE QSFP+ fiber port fails to go up Symptom A 40-Gigabit QSFP+ fiber port cannot go up. 24

28 Troubleshooting flowchart Figure 7 Troubleshooting link up failure on a port A port failed to go up Local/peer port operating correctly? Replace local/peer port Transceiver module/cable correct? Replace transceiver module/cable Fiber correct? Replace fiber Contact HP Support End Solution To resolve the problem: 1. Verify that the local and peer ports are operating correctly: a. Use a QSFP+ cable to directly connect the local port and another 40-GE QSFP+ fiber port of the same card. A QSFP+ cable is suitable for short connections. b. If the local port can go up, replace the peer port with a new one (on a card of the same type, if possible) to verify that the peer port is operating correctly. c. If the local port cannot go up, replace the local port with a new one (on a card of the same type, if possible) to verify that the local port is operating correctly. 25

29 2. Verify that the transceiver module is operating correctly: a. Execute the display transceiver alarm interface command to examine the alarms present on the transceiver module. The device displays ne if no error occurs. The device displays alarms if the transceiver module fails or the type of the transceiver module does not match the port type. b. Use an optical power meter to verify that the Tx power and Rx power of the transceiver module are stable and are within the correct range. c. Execute the display transceiver interface command to verify that the wavelength and transmission distance of the local transceiver module are consistent with the wavelength and transmission distance of the peer transceiver module. [HP] display transceiver interface fortygige 1/0/1 FortyGigE1/1/0/4 transceiver information: Transceiver Type : 40G_BASE_SR4_QSFP_PLUS Connector Type : MPO Wavelength(nm) : 850 Transfer Distance(m) : 100(OM3) Digital Diagnostic Monitoring : YES Vendor Name : HP d. If the transceiver module is not operating correctly, replace it with a new HP transceiver module that matches the fiber port. For more information about transceiver modules, see related installation guides. IMPORTANT: If a QSFP+ to SFP+ cable is used, use an optical attenuator to make sure the Tx power of the QSFP+ module stays below the Rx power of the SFP+ module. 3. Verify that the fiber matches the transceiver module. If they do not match, replace the fiber with a new one that matches the transceiver module. 4. If the problem persists, execute the display diagnostic-information command to save the diagnostic information, and contact HP Support. <HP> display diagnostic-information Save or display diagnostic information (Y=save, N=display)? [Y/N]:Y 40-GE CFP fiber port fails to go up Symptom A 40-GE CFP fiber port cannot go up. 26

30 Troubleshooting flowchart Figure 8 Troubleshooting link up failure on a port A port failed to go up Transceiver module correct? Replace transceiver module Fiber correct? Replace fiber Local port operating correctly? Replace local port Peer port operating correctly? Replace peer port Contact HP Support End 27

31 Solution To resolve the problem: 1. Verify that the transceiver module is operating correctly: a. Execute the display transceiver alarm interface command to examine the alarms present on the transceiver module. The device displays ne if no error occurs. The device displays alarms if the transceiver module fails or the type of the transceiver module does not match the port type. b. Use an optical power meter to verify that the Tx power and Rx power of the transceiver module are stable and are within the correct range. c. Execute the display transceiver interface command to verify that the wavelength and transmission distance of the local transceiver module are consistent with the wavelength and transmission distance of the peer transceiver module. d. If the transceiver module is not operating correctly, replace it with a new HP transceiver module that matches the fiber port. For more information about transceiver modules, see related installation guides. 2. Verify that the fiber matches the transceiver module. If they do not match, replace the fiber with a new one that matches the transceiver module. 3. Replace the local port with a new one (on a card of the same type, if possible) to verify that the local port is operating correctly. 4. Replace the peer port with a new one (on a card of the same type, if possible) to verify that the peer port is operating correctly. 5. If the problem persists, execute the display diagnostic-information command to save the diagnostic information, and contact HP Support. <HP> display diagnostic-information Save or display diagnostic information (Y=save, N=display)? [Y/N]:Y Error frames (for example, CRC errors) on a port Symptom In the output from the display interface command, error frames exist (for example, CRC error frames). 28

32 Troubleshooting flowchart Figure 9 Troubleshooting error frames (for example, CRC errors) on a port Error frames on the port Determine the type of error frames accumulating Optical power of transceiver module normal? Replace it with a transceiver module with normal optical power Speed and duplex match the peer port? Configure the speed and duplex for ports Port and link medium normal? Use normal port and link medium View the number of flow control frames received Contact HP Support End Solution To resolve the problem: 1. Examine the error frame statistics and identify the error frame type: a. (Optional.) Use the reset counter interface command in user view to clear the packet statistics of the port. This command resets the values of each statistical field to 0, so that you can view the statistics changes more clearly. 29

33 b. Use the display interface command to display the incoming packet statistics and outgoing packet statistics of the port. c. Determine the type of error frames that are accumulating. 2. If the port is a fiber port, verify that the optical power of the transceiver module is operating correctly: a. Use the display transceiver diagnosis interface command to view the present measured values of the digital diagnosis parameters for the transceiver module. b. If the optical power of the transceiver module is not within the correct range, replace the transceiver module with a transceiver module of the same model that is operating correctly. [HP] display transceiver diagnosis interface gigabitethernet1/0/1 GigabitEthernet1/0/1 transceiver diagnostic information: Current diagnostic parameters: Temp.( C) Voltage(V) Bias(mA) RX power(dbm) TX power(dbm) Verify that the port configurations are correct: a. Execute the display interface brief command. b. Determine whether the speed and duplex mode of the port match the speed and duplex mode of the peer port. c. If they do not match, use the speed command and the duplex command to set the speed and duplex mode for the port. 4. Verify that the port and the link medium are operating correctly: a. Plug the link medium into another port that is operating correctly, and determine whether the same problem occurs. b. If the problem still occurs, verify that the following items are operating correctly: Intermediate links and devices, including optical-to-electrical converters, cable terminal racks, and transmission devices. Transmission medium, including network cables, optical fibers, and transceiver modules. c. Examine the port: If the port is a copper port, directly connect the port to a PC. If the port is a fiber port, replace the transceiver module plugged into the port. 5. Determine whether the port has received a large amount of flow control frames: a. Use the display interface command to view the number of pause frames. If the number of pause frames is accumulating, you can determine that the port has sent or received a large amount of flow control frames. b. Verify that the incoming traffic and outgoing traffic have not exceeded the maximum traffic processing capability of the local device and the peer device. 6. If you determine that the configurations, the peer port, and the link are correct but the problem persists, perform the following tasks: Use the display diagnostic-information command to collect the diagnostic information. Contact HP Support. <HP> display diagnostic-information Save or display diagnostic information (Y=save, N=display)? [Y/N]:Y 30

34 Failure to receive packets Symptom A port is up, but it cannot receive packets. Troubleshooting flowchart Figure 10 Troubleshooting the failure to receive packets A port fails to receive packets View packet statistics of the port Port configurations affect packet receiving? Modify port configurations Port and link medium normal? Use normal port and link medium Contact HP Support End Solution To resolve the problem: 1. Examine the packet statistics of the port: a. (Optional.) Use the reset counter interface command in user view to clear the packet statistics of the port. This command resets the values of each statistical field to 0, so that you can view the statistics changes more clearly. b. Determine whether the ports at both ends are always up, and use the display interface command to determine whether the number of incoming packets is accumulating. At the same time, examine the outgoing packet statistics of the peer port. c. View the values of the error packet fields and determine whether the number of error packets is accumulating. 2. Verify that the port configurations do not affect packet receiving: 31

35 a. Use the display interface brief command to verify that the port configurations are correct. The port configurations include the duplex mode, speed, port type, and VLAN configurations of the ports at both ends of the link. b. If configuration errors exist, modify the port configurations. If the number of incoming packets in the output from the display interface command is accumulating, you can determine that the port can receive packets. c. If the port fails to receive packets, use the shutdown command and then the undo shutdown command to re-enable the port. If the number of incoming packets in the output from the display interface command is accumulating, you can determine that the port can receive packets. d. If the port is configured with STP, use the display stp brief command to verify that the port is not in the discarding state. e. If a port is set to the discarding state by STP, examine and modify the STP-related configurations to resolve the problem. HP recommends that you configure the port as an edge port or disable STP on the port if it is directly connected to a terminal. f. If the port is assigned to an aggregation group, use the display link-aggregation summary command to verify that the status of the port is Selected. g. If the status of the port is Unselected, the port cannot send or receive data packets. h. Determine the reasons why the port becomes Unselected, for example, the attribute configurations of the port are different from the reference port. Modify the attribute configurations of the port to make the port become Selected. 3. Verify that the port and the link medium are operating correctly: a. Plug the link medium into another port that is operating correctly, and determine whether the same problem occurs. b. If the problem still occurs, verify that the following items are operating correctly: Intermediate links and devices, including optical-to-electrical converters, cable terminal racks, and transmission devices. Transmission medium, including network cables, optical fibers, and transceiver modules. c. Examine the port. If the port is a copper port, directly connect the port to a PC. If the port is a fiber port, replace the transceiver module plugged into the port. 4. If you determine that the configurations, the peer port, and the link are correct but the problem persists, perform the following tasks: Use the display diagnostic-information command to collect the diagnostic information. Contact HP Support. <HP> display diagnostic-information Save or display diagnostic information (Y=save, N=display)? [Y/N]:Y 32

36 Failure to send packets Symptom A port is up, but it cannot send packets. Troubleshooting flowchart Figure 11 Troubleshooting the failure to send packets Solution To resolve the problem: 1. Examine the packet statistics of the port: a. (Optional.) Use the reset counter interface command in user view to clear the packet statistics of the port. This command resets the values of each statistical field to 0, so that you can view the statistics changes more clearly. b. Determine whether the ports at both ends are always up, and use the display interface command to determine whether the number of outgoing packets is accumulating. c. Determine whether the number of error packets is accumulating. 2. Verify that the port configurations do not affect packet sending: 33

37 a. Use the display interface brief command to verify that the port configurations are correct. The port configurations include the duplex mode, speed, port type, and VLAN configurations of the ports at both ends of the link. b. If configuration errors exist, modify the port configurations. If the number of outgoing packets in the output from the display interface command is accumulating, you can determine that the port can send packets. c. If the port fails to send packets, use the shutdown command and then the undo shutdown command to re-enable the port. If the number of outgoing packets in the output from the display interface command is accumulating, you can determine that the port can send packets. d. If the port is configured with STP, use the display stp brief command to verify that the port is not in the discarding state. e. If a port is set to the discarding state by STP, examine and modify the STP-related configurations to resolve the problem. HP recommends that you configure the port as an edge port or disable STP on the port if it is directly connected to a terminal. f. If the port is assigned to an aggregation group, use the display link-aggregation summary command to verify that the status of the port is Selected. g. If the status of the port is Unselected, the port cannot send or receive data packets. h. Determine the reasons why the port becomes Unselected, for example, the attribute configurations of the port are different from the reference port. Modify the attribute configurations of the port to make the port become Selected. 3. Verify that the port and the link medium are correct: a. Plug the link medium into another port that is operating correctly, and determine whether the same problem occurs. If the port is a copper port, replace the peer device with a PC. If the port is a fiber port, replace the transceiver module. b. If the problem still occurs, determine whether intermediate links and devices are operating correctly (for example, optical converters, cable terminal racks, and transmission devices). 4. If you determine that the configurations, the peer port, and the link are correct but the problem persists, perform the following tasks: Use the display diagnostic-information command to collect the diagnostic information. Contact HP Support. <HP> display diagnostic-information Save or display diagnostic information (Y=save, N=display)? [Y/N]:Y Related commands This section lists the commands that you might use for troubleshooting ports. Command display diagnostic-information display interface display interface brief Description Displays or saves running status data for multiple feature modules. Displays Ethernet interface information. Displays brief interface information. 34

38 Command display link-aggregation summary display logbuffer display stp brief display transceiver alarm interface display transceiver diagnosis display transceiver interface Description Displays the summary information for all aggregation groups. Displays the state of the log buffer and the log information in the log buffer. Displays brief spanning tree status and statistics. Displays the current transceiver module alarms. Displays the present measured values of the digital diagnosis parameters for transceiver modules. Displays the key parameters of transceiver modules. Troubleshooting IRF This section provides troubleshooting information for common IRF problems. IRF fabric establishment failure Symptom A chassis cannot be added to an IRF fabric. 35