[j-nsp] MX960 Redundant RE problem

[Per Granath]

> We have an MX960 with two routing engines, Re0: Backup, Re1: Master
> 
> When we try to switchover to the backup RE we see the following message:
> 
> XXX# run request chassis routing-engine master switch
> 
> error: Standby Routing Engine is not ready for graceful switchover
> (replication_err soft_mask_err)
> 

Disable graceful-switchover (and nonstop-routing) and then commit (assuming there is commit synchronize).
Then enable it again, commit, and wait for the REs to sync.

Something with the kernel database not being healthy, possibly.

...or try JTAC :)