Description

On a wide range of Junos devices, the alarm is triggered when there is a port speed change made on one of the ports residing on FPC/PIC. This behavior can be seen on both FPC and PIC since it depends on the hierarchy on which the port lies. 

Symptoms

Active alarms start appearing on the device when new port speed changes are made and a reboot/restart has not been initiated.

user@router> show chassis alarms no-forwarding

1 alarms currently active
Alarm time               Class  Description
2020-04-07 16:15:43 PDT  Minor FPC 2 PIC 0 Need bounce

OR

user@router> show chassis alarms no-forwarding

1 alarms currently active
Alarm time               Class  Description
2020-04-07 16:15:43 PDT  Minor  FPC 2 Need bounce

Solution

When the following configuration change is made and ASIC is not re-initiated with this new configuration, the minor alarm could be triggered.

#set chassis fpc 2 pic 0 port 20 speed 10g
#commit

Soft Restart:

In case of Minor alarm for PIC,

>request chassis pic fpc-slot fpc-slot-number  pic-slot  pic-slot-number offline
<wait for 2 minutes>
>request chassis pic fpc-slot  fpc-slot-number  pic-slot  pic-slot-number  online

In case of Minor alarm for FPC,

>request chassis fpc offline slot fpc- sl ot-number
<wait for 2 minutes>
>request chassis fpc online slot  fpc- sl ot-number

OR

>request chassis fpc restart slot  fpc- sl ot-number

Hard Restart/ Re-seat:

Re-seat the FPC/PIC from the device manually to initiate a hard restart of the component.

Modification History

9/24/2024 dconejomora - Adding MX specific platform MX10003
9/24/2024 dconejomora - changing username jtac with username router

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