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Backup device of Active/Passive NSRP cluster is showing as (M)



Article ID: KB16272 KB Last Updated: 21 Jun 2010Version: 3.0
Why are both the primary and Backup showing (M) in an Active/Passive cluster?
After logging into the CLI of the both the primary and backup devices in an Active/Passive cluster, the prompt shows as (M) indicating that both are the primary .  However, in the “get nsrp” output, one is showing as primary and the other is showing as Primary Backup.

Note:  If the output of "get nsrp" shows the PB (Primary Backup) as none, then refer to KB11450 - What is NSRP split brain? Why are both of my firewalls in the primary state?

The LED on both Chassis is GREEN and the get led command shows id 6: color 1, to flash 0, state 0, flash color 0, new 1, toggle color 0 on both. The 1 indicates GREEN.

The phenomenon for the symtpom above will happen when the default vsd group 0 has been unset, which enables VSD-less mode.

Solution 1

Run the following command: 

unset nsrp rto-mirror session non-vsi

The command “set nsrp rto-mirror session non-vsi” is only for VSD-less and Active/Active clusters. This command will enable the non-VSI sessions to sync across the cluster. This will cause both devices to be listed as (M) and should not be used in an Active/Passive cluster since both of the configurations should be identical.

Once you unset this command on LED will be GREEN and one will be AMBER and the get led on the backup will look as follows: id 6: color 2, to flash 0, state 0, flash color 0, new 2, toggle color 0. The 2 indicates AMBER.

Solution 2

unset nsrp vsd-group id 0


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