That's likely this: http://kb.juniper.net/InfoCenter/index?page=content&id=KB26731.

We'll need to either do a:

• a RE graceful switchover (traffic affecting, hopefully not much); or
• restart chassis-control immediately which has "a small risk that this reconnect could fail, if the restart of the chassis takes longer than expected, which could lead to the FPC restarting and subsequent traffic loss".

Either way, let's see what TAC says. Chris, do not run any of these commands if they instruct you to; they are possibly traffic affecting.

This is the response I received from Juniper regarding the CB1 error. His suggestion.

Can you set up a MW to switch the CB mastership? The SCB contains circuitry that controls the PEMs. Only the master SCB does this and at this point SCB 1 is master. We can switch masterhip of SCB 1 to SCB 0 to see if it’s an issue with CB 0. Please only do this during a Maintenance window as it will cause traffic disruption:

1. request chassis routing-engine master switch

Regards

Daniel