336 Configuring Routing
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Configuring VRRP
Virtual Router Redundancy Protocol (VRRP) specifies an elector protocol that dynamically assigns
routing responsibility to one of the VRRP routers on the LAN (the master router). The election
process enables dynamic failover of routing responsibility in case the master router becomes
unavailable.
The advantage of VRRP is that it eliminates the single-point-failure phenomenon inherent to the
routing environment by providing a higher availability default path, while eliminating the need for
configuration of dynamic routing or router discovery protocols on every end-host.
The
Virtual Router Redundancy Protocol (VRRP)
page sets the switch’s VRRP routing
parameters. To open the
Virtual Router Redundancy Protocol (VRRP)
page, click
Router
→
Global Routing Parameters
→
VRRP
in the tree view.
Figure 8-3. Virtual Router Redundancy Protocol (VRRP) Page
Interface
— Interface type and number attached to the VRRP router.
VRID (1-255)
— Virtual router identifier.
Priority (1-255)
— Router priority used for the virtual router election process. The value may
determine if a higher priority VRRP router overrides a lower priority VRRP router.
Primary IP Address
— Virtual IP address identified with the virtual router. The primary IP Address
is selected from actual interface addresses configured on a VRRP router.
Master IP Address
— The VRRP router that is currently master for this virtual router.
State
— The current router state. Possible values are:
Master
— The router functions as the forwarding router for the IP addresses associated with
the virtual router. The master router responds to ARP requests with associated IP addresses in
the ARP target, forwards packets with Virtual MAC Address (VMAC) as the destination