This article explains the reason for FPC Major errors due to the GE Switch: MAC RX Errors
A major alarm will be triggered for the affected FPC
user@router> show chassis alarms Major FPC [x] Major Errors
In the MESSAGES folder, we could see that the alarms were triggered due to the GE Switch
Set FPC ESW error 0x180004.2
node1.fpc1 CMError: /fpc/1/pfe/0/cm/0/GE_Switch/0/CMERROR_GESW_MODULE[4] (0x180004), scope: board, category: functional, severity: major, module: GE Switch, type: ESW Errors for Port (4:HA-1), oc_category: default
node1.fpc1 Performing action get-state for error /fpc/1/pfe/0/cm/0/GE_Switch/0/CMERROR_GESW_MODULE[4] (0x180004) in module: GE Switch with scope: board category: functional level: major, oc_category: default
node1.fpc1 Cmerror Op Sub Set: GE Switch: MAC RX Errors (3) Exceeded Raise Threshold (3) for Port (4:HA-1) (URI: /fpc/1/pfe/0/cm/0/GE_Switch/0/CMERROR_GESW_MODULE[4])
node1.fpc1 Performing action cmalarm for error /fpc/1/pfe/0/cm/0/GE_Switch/0/CMERROR_GESW_MODULE[4] (0x180004) in module: GE Switch with scope: board category: functional level: major, oc_category: default
alarmd[15253]: Alarm set: FPC id=150995304, color=RED, class=CHASSIS, reason=FPC 1 Major Errors
craftd[14369]: Major alarm set, FPC 1 Major Errors
node1.fpc1 cmerror_level_decrement: for /fpc/1/pfe/0/cm/0/GE_Switch/0/CMERROR_GESW_MODULE[4] (0x180004), scope: board, category: functional, severity: major, module: GE Switch, type: ESW Errors for Port (4:HA-1) <<<
node1.fpc1 Performing action clear-cmalarm for error /fpc/1/pfe/0/cm/0/GE_Switch/0/CMERROR_GESW_MODULE[4] (0x180004) in module: GE Switch with scope: board category: functional level: major, oc_category: default
node1.fpc1 Cmerror Op Sub Clear: GE Switch: MAC RX Errors (0) Within Clear Threshold (0) for Port (4:HA-1) (URI: /fpc/1/pfe/0/cm/0/GE_Switch/0/CMERROR_GESW_MODULE[4])
alarmd[15253]: Alarm cleared: FPC id=150995304, color=RED, class=CHASSIS, reason=FPC 1 Major Errors
fw01b.tyob craftd[14369]: Major alarm cleared, FPC 1 Major Errors
The alarm was triggered due to the error count crossing the defined threshold on the internal GE switch within the FPC. This switch is responsible for data exchange between internal components such as the PFE, RE, and MIC. Such errors are known to be transient in nature and can occur sporadically without indicating a hardware failure, resulting in a temporary major CMERROR condition.
These messages are categorized as internal log entries with an error severity level and do not indicate any actionable fault.
No specific cause analysis or corrective action is required since the alarm gets cleared on its own.
This event can be safely ignored, and there is no indication of a hardware issue with the FPC.