Vrrp Commands - Avaya G250 Administration

Configuring the router
There is one main router on IP subnet 20.20.20.0, such as a G350, C363T, C364T, 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.
The virtual router IP address needs to be configured as the default gateway on the
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stations.
The Main router advertises a six-byte Virtual MAC address in the format
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00.00.5E.00.01.02 VRID as a response to the stations' ARP requests.
The redundant router uses a VRRP polling protocol to check the Main router integrity at
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one second intervals (default). Otherwise, it is idle.
If the Main router fails, the redundant router that does not receive a response from four
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consecutive polling requests (default) takes over and starts to advertise the same Virtual
MAC for ARP requests. Therefore the stations will not sense any change either in the
configured default gateway or at the MAC level.
VRRP has no provisions for routing database synchronization among the redundant
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routers. You need to perform this manually if needed.

VRRP commands

Use the following commands to configure VRRP. For more information about these commands,
see Avaya G250 and Avaya G350 CLI Reference, 03-300437.
Use the ip vrrp command to create a virtual router on an interface. Use the no form of
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this command to delete a virtual router.
Use the ip vrrp address command to assign an IP address to a virtual router. Use the
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no form of this command to remove an IP address from a virtual router.
Use the ip vrrp auth-key command to set the virtual router simple password
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authentication key for the virtual router ID. Use the no form of this command to disable
simple password authentication for the virtual router instance.
444 Administration for the Avaya G250 and Avaya G350 Media Gateways