VRRP Components
380 Router Configuration Guide
To facilitate the sending of mismatch log messages, each virtual router instance keeps the
mismatch state associated with each source IP address in the VRRP master table. Whenever
the state changes, a mismatch log message is generated indicating the source IP address
within the message, the mismatch or match event and the time of the event.
With secondary IP address support, multiple IP addresses may be found in the list and it
should match the IP address on the virtual router instance. Owner and non-owner virtual
router instances have the supported IP addresses explicitly defined, making mismatched
supported IP address within the interconnected virtual router instances a provisioning issue.
Inherit Master VRRP Router’s Advertisement Interval Timer
The virtual router instance can inherit the master VRRP router’s advertisement interval timer
which is used by backup routers to calculate the master down timer.
The inheritance is only configurable in the non-owner nodal context. It is used to allow the
current virtual router instance master to dictate the master down timer for all backup virtual
routers.
IPv6 Virtual Router Instance Operationally Up
Once the 7750 SR or 7950 XRS IPv6 virtual router is properly configured with a minimum
of one link-local backup address, the parent interface’s router advertisement must be
configured to use the virtual MAC address for the virtual router to be considered
operationally up.
Policies
Policies can be configured to control VRRP priority with the virtual router instance. VRRP
priority control policies can be used to override or adjust the base priority value depending
on events or conditions within the chassis.
The policy can be associated with more than one virtual router instance. The priority events
within the policy override or diminish the base priority dynamically affecting the in-use
priority. As priority events clear in the policy, the in-use priority can eventually be restored
to the base priority value.
Policies can only be configured in the non-owner VRRP context. For non-owner virtual
router instances, if policies are not configured, then the base priority is used as the in-use
priority.
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