MX2020 which auto switchover RE after raised major alarm SPMB 0 not online.
root@DNI-PE1-MX2020_RE1> show chassis alarms no-forwarding
2 alarms currently active Alarm time Class Description
2024-03-06 05:14:32 ICT Major SPMB 0 not online
2024-03-06 05:14:02 ICT Minor Backup RE Active
Mar 6 05:10:52.412 2024 DNI-PE1-MX2020_RE0 chassisd[9190]: %DAEMON-4-CHASSISD_IPC_CONNECTION_DROPPED: Dropped IPC connection for SPMB 0
Mar 6 05:10:52.412 2024 DNI-PE1-MX2020_RE0 alarmd[23770]: %DAEMON-4: Alarm set: SPMB id=33554547, color=RED, class=CHASSIS, reason=SPMB 0 not online
Mar 6 05:10:52.412 2024 DNI-PE1-MX2020_RE0 craftd[9193]: %DAEMON-4: Major alarm set, SPMB 0 not online
Mar 6 05:10:52 rcv: ch_ipc_dispatch() ipc pipe read error for args 0x11738da0 pipe 0x108c44a0, fru SPMB 0 errno 60
Mar 6 05:10:52 ch_ipc_dispatch: fru SPMB offline_reason = None
Mar 6 05:10:52 ch_connection_shutdown: Destroying the IPC pipe
Mar 6 05:10:52 CHASSISD_IPC_CONNECTION_DROPPED: Dropped IPC connection for SPMB 0
Mar 6 05:10:52 -- SPMB 0, last request 0, state Online
Mar 6 05:10:52 send: red alarm set, device SPMB 0, reason SPMB 0 not online
Mar 6 05:10:52 hwdb: entry for spmb 2857 at slot 0 deleted
Mar 6 05:10:52 FM: SPMB connection is lost
Mar 6 05:10:52 SFB soft init mask 0xff
Mar 6 05:10:52 CHASSISD_JAM_RECONNECT_FILE_WRITE: jam_adc_create_reconnect_file: writen 28 bytes to file /usr/share/pfe/spmb_reconnect.txt packed size len 28
Mar 6 05:10:52 ADC soft init mask 0x2a800
Mar 6 05:10:52 spmb_fru_reconnect_window_begin: Opening FRU reconnect window
Mar 6 05:10:52 SPMB 0: spmb_disconnect: Starting restart timer
Mar 6 05:10:52 CHASSISD_SNMP_TRAP10: SNMP trap generated: Fru Offline (jnxFruContentsIndex 14, jnxFruL1Index 1, jnxFruL2Index 0, jnxFruL3Index 0, jnxFruName SPMB 0, jnxFruType 10, jnxFruSlot 0, jnxFruOfflineReason 2, jnxFruLastPowerOff 1026908651, jnxFruLastPowerOn 2678)
Mar 6 05:11:03 tcb_update_local_esw_status: ESW port 23 (connected to SPMB) link down
Mar 6 05:11:08 tcb_update_local_esw_status: ESW port 23 (connected to SPMB) link up
Mar 6 05:11:13 tcb_update_local_esw_status: ESW port 23 (connected to SPMB) link down
Mar 6 05:11:52 CHASSISD_SPMB_RESTART_TIMEOUT: Attempt 1 to restart SPMB 0 timed out; trying again
Mar 6 05:11:52 SPMB 0: spmb_hw_restart
Mar 6 05:11:52 notify_fru_power_off: NULL kvpairs for SPMB 0
Mar 6 05:12:52 CHASSISD_SPMB_RESTART_TIMEOUT: Attempt 2 to restart SPMB 0 timed out; trying again
Mar 6 05:12:52 SPMB 0: spmb_hw_restart
Mar 6 05:12:52 notify_fru_power_off: NULL kvpairs for SPMB 0
Mar 6 05:13:52 CHASSISD_SPMB_RESTART_TIMEOUT: Attempt 3 to restart SPMB 0 timed out; Switch Mastership
Try to restart the SPMB 0 :
Use below command "request chassis spmb slot <x> restart"
>request chassis spmb slot 0 restart
If it didn't work, then log in to the shell:
> start shell user root
# cty -f spmb0
If it is still not reachable , then we need to try reseat the CB0 :
> request vmhost halt re0or>request system halt <re>>show chassis routing-engine
> request chassis CB slot 0 offline >show chassis environment cb
and then,
reseat CB0 and check the behavior.
If after CB reseat, SPMB is still not coming online, then please contact JTAC for an RMA of the CB.