Technical data

102 Meru System Director Configuration Guide © 2012 Meru Networks, Inc.
N+1 Redundancy
Changing the WTR Interval
To provide stability and reduce unintended failback flip-flopping, a Wait to Restore
(WTR) count-down timer is used to count down before the Standby slave can again
take over the role of a Master unit it recently relinquished. By default, this interval
is set for 8 minutes, but can be changed to a number of minutes from 1 to 20 minutes.
To change the interval, use the nplus1 wtr set command:
3000-slave# configure terminal
3000-slave(config)# nplus1 wtr set minutes
3000-slave(config)# end
To clear the counter on a Master Controller that is in the process of counting down
and start an immediate failover, use the nplus1 wtr clear command:
3000-slave# configure terminal
3000-slave(config)# nplus1 wtr clear Master_IP_addr
3000-slave(config)# end
Disabling and Deleting N+1 Master Controllers
To disable N+1 operation on a master controller, but still maintain its configuration
in the cluster, from the slave controller, use the nplus1 disable command, with the
IP address of the controller you are deleting:
3000-slave# configure terminal
3000-slave(config)# nplus1 disable 10.1.1.10
3000-slave(config)# end
To remove an N+1 master controller from the cluster, from the slave controller, use
the nplus1 delete command, with the IP address of the controller you are deleting:
3000-slave# configure terminal
3000-slave(config)# nplus1 delete 10.1.1.10
3000-slave(config)# end
Stopping N+1 Installations
N+1 Slave and N+1 Master Controllers must be stopped separately.
Stopping N+1 Slave Controllers
To stop N+1 on a Slave Controller:
3000-slave# configure terminal
3000-slave(config)# nplus1 stop
Making this a normal controller.
3000-slave(config)# exit
3000-slave#
Stopping N+1 Master Controllers
To stop N+1 on a Master Controller: