Vrrp Configuration Example - Avaya G250 Administration

In VRRP, two or more physical routers can be associated with a virtual router, thus achieving
extreme reliability. In a VRRP environment, host stations interact with the virtual router. The
stations are not aware that this router is a virtual router, and are not affected when a new router
takes over the role of master router. Thus, VRRP is fully interoperable with any host station.
You can activate VRRP on an interface using a single command while allowing for the
necessary fine-tuning of the many VRRP parameters. For a detailed description of VRRP, see
VRRP standards and published literature.

VRRP configuration example

The following diagram illustrates an example of a VRRP configuration:
Figure 37: VRRP configuration example
There is one main router on IP subnet 20.20.20.0, such as a G350, P333R, C460, or any router
that supports VRRP, and a backup router. You can configure more backup routers.
The G250/G350 itself must have an interface on the IP subnetwork, for example,
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20.20.20.2
Configure all the routers under the same VRID, for example,1.
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You must configure the routers per VLAN.
An assigned VRID must not be used in the network, even in a different VLAN
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When router configuration is complete and the network is up, the main router for each
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virtual router is selected according to the following order of preference:
- The virtual router IP address is also the router's interface IP address.
- It has the highest priority (you can configure this parameter).
- It has the highest IP address if the previous conditions do not apply.
Configuring VRRP
Issue 1.1 June 2005 353