The chassism process could not forward traffic as expected.
When a cm_ff_ifd_disable: fast failover disabled for event occurs, a message similar to the following is reported:
chassism: %DAEMON-3: cm_ff_ifd_disable: fast failover disabled for internal-0/26
These messages indicate possible internal forwarding path issues within the Virtual Chassis system. Possible causes could be a bad VC cable or port.
Perform these steps to determine the cause and resolve the problem (if any):
1. Collect the show command output to help determine the cause of this message.
Capture the output to a file (in case you have to open a technical support case). To do this, configure each SSH client/terminal emulator to log your session.
show log messages
2. Analyze the show command output. Look for any related events that occurred at or just before the
cm_ff_ifd_disable: fast failover disabled
3. During a maintenance window, as it will impact transit traffic, reseat and/or replace the VC cable and observe if the problem goes away.