Black Box LGB6026A, Management Manual

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VRRP C
OMMANDS
Virtual Router Redundancy Protocol (VRRP) use a virtual IP address to
support a primary router and multiple backup routers. The backup routers
can be configured to take over the workload if the master router fails, or
can also be configured to share the traffic load. The primary goal of router
redundancy is to allow a host device which has been configured with a
fixed gateway to maintain network connectivity in case the primary
gateway goes down.
To configure VRRP, select an interface on each router in the group that will
participate in the protocol as the master router or a backup router. To
select a specific device as the master router, set the address of this
interface as the virtual router address for the group. Now set the same
virtual address and a priority on the backup routers, and configure an
authentication string. You can also enable the preempt feature which
allows a router to take over as the master router when it comes on line if it
has a higher priority than the currently active master router.
Table 141: VRRP Commands
Command Function Mode
vrrp authentication Configures a key used to authenticate VRRP packets IC
received from other routers
vrrp ip Enables VRRP and sets the IP address of the virtual IC
router
vrrp preempt Configures the router to take over as master virtual IC
router for a VRRP group if it has a higher priority than
the current master virtual router
vrrp priority Sets the priority of this router in the VRRP group IC
vrrp timers advertise Sets the interval between successive advertisements IC
by the master virtual router
clear vrrp interface
counters
Clears VRRP interface statistics
PE
clear vrrp router counters Clears VRRP router statistics PE
show vrrp Displays VRRP status information PE
show vrrp interface Displays VRRP status information for the specified PE
interface
show vrrp interface
counters
Displays VRRP statistics for the specified interface PE
show vrrp router counters Displays VRRP statistics PE