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Title: Troubleshooting for VSU failure [Print this page]
Author: Crystal Time: 2018-4-9 10:20
Title: Troubleshooting for VSU failure
how to collecting information when VSU fails
Author: admin Time: 2018-4-9 19:14
Step1: Check the status of the Virtual Switch Unit (VSU)system.Check the status of the VSU system todetermine whether the network is disconnected due to VSU failure.
(1) Check whether VSU configurations arecorrect.
ruijie#show switch virtual config
(2) Check whether Virtual Switching Links(VSLs) are normal.
ruijie#show sw vir link
ruijie#show sw vir link port//Check whether VSLs are normal. If yes, the VSU system is not split.
ruijie#show int count error
ruijie#show int trans //If VSLs are created using opticaltransceivers, check the optical transceivers.
ruijie#show int trans dia //If VSLs are created using opticaltransceivers, check optical attenuation of the fiber.
(3) If all VSLs go down, log in to twoswitches at link ends to check whether one of them enters the recovery mode.The one entering recovering mode is the standby.
ruijie#show sw virtual dual-active summary
BFDdual-active detection enabled: Yes
Aggregateportdual-active detection enabled: NO
In dual-active recovery mode: Yes //At least one switch should be in therecovery mode. If neither one enters the recovery mode, VSLs are abnormal andthe dual-active detection is disabled when two active switches exist.
(4) If one switch enters the recovery mode(all its interfaces are shut down this time), check whether the disconnectedPCs connect to the standby switch. If yes, re-connect the PCs to the activeswitch to avoid the influence of the recovering mode.
(5) If all VSLs go down, check whether thefault is caused by software problems or link disconnection.
a.Enter the management board and the corresponding VSL line card to check whethercrash information exists. Run the following commands to collect faultinformation:
Ruijie#debug support
Ruijie(support)#tech-supportpackage
b.Check whether the keepalive timeout information of the line card is logged.
c.Check whether the abnormal reset of management board (not crash) is logged.
Step2: Check whether the VSU system properly sends packetsto the control panel.(1) Run the show arp command tocheck whether the switches in disconnected network segments can learn MAC addresses.
(2)Check by CPP whether related packets aresent to the CPU. (You have to check packets under protocols enabled in thenetwork especially for connectivity protocols, for example, ARP, VRRP, andBPDU.)
Runeach of the following commands for five times:
Ruijie#show cpu-pro
Ruijie#show cpu-pro mb
Ruijie#show cpu-protect slot X //X indicates the slot ID. For example, run show cpu-pro slot 4 to display information of Slot 4 on thestandalone server S86E; run show cpu-proslot 2/4 to display information of Slot 4 on Cabinet 2 of the VSU system.
If thenumber of packets sent to the CPU of the line card or management board isalways 0, the packet reception by CPU is abnormal.
Step3: Check the interface traffic of the VSU system.Ruijie#show int count rate //Check whether the interface rate exceedsthe interface bandwidth.
Ruijie#show int count summary //Checkwhether the interface input/output broadcast packets increase rapidly. If yes,a loop must have occurred in the network.
Step4: Check whether VSU system resources are normal.Ruijie#show cpu //Check whether CPU resources ofthe VSU system are normal.
Ruijie#show memory //Check the memory utilization of the VSUsystem.
Ruijie#debug support
Ruijie(support)#tech-support package
Step5: Collect and summarize log information.Collect log information (enable the timestamp and ensure time accuracy) and provide it to Ruijie technical support foranalysis.
Collect basic information:
ruijie>enable
ruijie#
---------In Privileged EXEC Mode(ruijie#)----------------
show ver
show ver slot
show run
show cpu
show memory
show logging
show cpu-protect
show cpu-protect mb
show cpu-protect slot X //X indicates the slot ID. For example, runshow cpu-pro slot 4 to displayinformation of Slot 4 on the standalone server S86E; run show cpu-pro slot 2/4 to display information of Slot 4 on Cabinet 2of the VSU system.
show interfaces counters rate
show interfaces counters
show int count summary
show int count error
show mac-address-table
show arp
show mac-address-table count
show arp count
Collect VSU information:
ruijie>enable
ruijie#
---------In Privileged EXEC Mode(ruijie#)----------------
show switch virtual link
show switch virtual link port
show switch virtual config
show switch virtual role
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