Description

Steps to replace or restart Switch Processor Mezzanine Board (SPMB)

Symptoms

Some users experience difficulties when they try to replace or restart the SPMB. Here's a detailed list of steps you can follow during your emergency window. 

Solution

  • During a MW do a RE switchover making RE0 backup and RE1 master, ensure to have console access for both RE. From Master RE0, verify the status for switchover then do switchover

request chassis routing engine mastership switch check

request chassis routing-engine master switch

 

  • Check the status of both RE

show chassis routing engine

 

  • Once RE0 becomes the backup, navigate to master RE1 and power off RE0, this will power off only backup RE0 and RE1 will remain online

request vmhost power-off other routing engine

 

  • Check RE 0 status to go offline

show chassis routing engine

 

  • Once RE0 is offline, power off CB0 from Master RE1and check status of CB0

request chassis cb slot 0 offline

show chassis environment cb

 

  • After verifying CB0 is offline safely remove this from the chassis and replace it with a newly RMA’ed CB0 (spmb0 is embedded inside cb0)

 

  • After replacing, power on CB0 from master RE1 and check status

request chassis cb slot 0 online

show chassis environment cb

 

  • Once CB0 is online, From Master RE1, Power on RE0 and check status of RE0

request vmhost power-on other routing engine

show chassis routing engine

 

  • RE-verify status of RE0,CB0 and spmb0 using commands

show chassis routing-engine

show chassis environment cb

show chassis spmb

show chassis spmb errors

show chassis alarms

show logs messages. | last 100

 

  • Once everything is online with no errors/alarms verify switchover status and perform switchover RE mastership

request chassis routing engine mastership switch check

request chassis routing-engine master switch

 

  • RE-verify status of RE0,CB0 and spmb0 using below command and do quick health check of the box

show chassis routing-engine

show chassis environment cb

show chassis spmb

show chassis spmb errors

show chassis alarms

show system core-dumps

show chassis fpc detail

show chassis fabric summary

show system process extensive

show system memory

show chassis fabric plane

show chassis fabric fpc

show chassis fabric reachability

show logs messages. | last 100




Modification History

2024-10-14 : Article Created