This KB describes the following error and how to clear it:

PECHIP_CMERROR_HMCIF_LINK0_INT_REG_HMC_ERR_MAJOR (0x210087)

root@lab_re0> show chassis alarms no-forwarding

1 alarms currently active
Alarm time               Class  Description
2023-07-30 00:23:06 EDT  Major  FPC 0 Major Errors

The following syslog message is seen:

/fpc/0/pfe/0/cm/0/PE_Chip/0/PECHIP_CMERROR_HMCIF_LINK0_INT_REG_HMC_ERR_MAJOR (0x210087) in module: 
PE Chip with scope: pfe category: memory level: major  Jul 30 00:23:08 bx6-seattle fpc0 Cmerror Op Set: 
PE Chip: pe0[0]: HMCIF: Link0: HMC Major Error cmd:62 lng:1 ltag:0 dinv:0 errstat:31 err_cnt:0xc0   
Jul 30 00:23:08 bx6-seattle fpc0 Performing action get-state for error

• HMC (Hybrid Memory Cubic) is the memory module. This issue could be caused by an HMC transient hardware issue. 
• These are transient errors reported on the HMCIF Link between HMC-PFE.
• These errors are non-service affecting.
• In future releases, this error will not generate an alarm and would only show as a syslog message.

Reset the FPC during a maintenance window clear the alarm.

request chassis fpc slot slot-number <FPC_SLot> (offline | online | restart) 

For more information on FPC restart, refer to the documentation on request chassis fpc. 

2023-09-25: KB Created