• The Main router advertises a six-byte Virtual MAC address, in the format
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
one-second intervals (default). Otherwise, it is idle.
• If the Main router fails, the redundant router that does not receive a response from four
consecutive polling requests (default) takes over and starts to advertise the same Virtual
MAC for ARP requests. Therefore, the stations will not detect any change either in the
configured default gateway or at the MAC level.
• VRRP has no provisions for routing database synchronization among the redundant
routers. You must perform this manually, if needed.
Summary of VRRP commands
For more information about these commands, see the Avaya Branch Gateways G250 and
G350 CLI Reference.
For more information about these commands, see the Avaya Branch Gateway G430 CLI
Reference.
Root level
command
Command Description
interface
(fastethernet
|vlan)
Enter the FastEthernet or VLAN interface
configuration context
ip vrrp Create a virtual router on an interface
no ip vrrp Delete a virtual router
ip vrrp
address
Assign an IP address to a virtual router
no ip vrrp
address
Remove an IP address from a virtual router
ip vrrp auth-
key
Set the virtual router simple password
authentication key for the virtual router ID
no ip vrrp
auth-key
Disable simple password authentication for
the virtual router instance
ip vrrp
override addr
owner
Accept packets addressed to the IP
addresses associated with the virtual router,
such as ICMP, SNMP, and telnet (if it is not
the IP address owner)
The router
476 Administering Avaya G430 Branch Gateway October 2013
Comments? infodev@avaya.com
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