Riverstone Networks WICT1-12 12.3 MONITORING VRRP

12-10 Riverstone Networks RS Switch Router User Guide Release 8.0
Monitoring VRRP VRRP Configuration Guide
12.2.4 Setting Pre-empt Mode
When a Master router goes down, the Backup with the highest priority takes over the IP addresses associated with the
Master. By default, when the original Master comes back up again, it takes over from the Backup router that assumed
its role as Master. When a VRRP router does this, it is said to be in pre-empt mode. Pre-empt mode is enabled by default
on the RS. You can prevent a VRRP router from taking over from a lower-priority Master by disabling pre-empt mode.
To do this, enter the following command in Configure mode:
To prevent a Backup router from taking over as Master from a Master router that has a lower priority:
Note If the IP address owner is available, then it will always take over as the Master,
regardless of whether pre-empt mode is on or off.
12.2.5 Setting an Authentication Key
By default, no authentication of VRRP packets is performed on the RS. You can specify a clear-text password to be
used to authenticate VRRP exchanges. To enable authentication, enter the following command in Configure mode
To authenticate VRRP exchanges on virtual router 1 on interface int1 with a password of ‘yago’:
Note The RS does not currently support the IP Authentication Header method of
authentication.
12.3 MONITORING VRRP
The RS provides two commands for monitoring a VRRP configuration: ip-redundancy trace, which displays
messages when VRRP events occur, and ip-redundancy show, which reports statistics about virtual routers.
rs(config)# ip-redundancy set vrrp 1 interface int1 preempt-mode
disabled
rs(config)# ip-redundancy set vrrp 1 interface int1 auth-type text
auth-key yago