Vrrp Configuration Considerations - Avaya Cajun P882 User Manual

Using the CLI

VRRP Configuration Considerations

Selecting VR ID
numbers for
Virtual Routers
Assigning the IP
Address of a
Virtual Router
IP Address
Owner Features
Avaya P550R, P580, P880, and P882 Multiservice Switch User Guide, v5.3.1
To view VRRP virtual router statistics using the CLI, enter the
following command in User mode:
> show ip vrrp [cr|<if-name>|<detail>]
Refer to the Command Reference Guide for the Avaya P550R, P580, P880,
and P882 Multiservice Switches, Version 5.3.1 for details about this
command.
The allowable range for the VR ID of a virtual router is 1-255. For
easiest troubleshooting and identification, it is recommended that
each virtual router have a unique VR ID. Duplicate VR ID's are
allowed, however, as long the IP Interfaces they are associated with
are on different VLAN's. Because of this, VRRP cannot be configured
in a multinetted network.
When creating a virtual router, it must be first decided whether to
make the IP Address of the virtual router (the VIP) unique or the
same as the Primary IP Address of the associated IP Interface
address. If the VIP is unique, this is known as non-IP Address
Owner. This means the VIP is not "owned" by the router as a
Primary IP Address. If the VIP is not unique, meaning it matches the
Primary IP Address of the associated IP Interface, then this is known
as IP Address Owner. The VIP Address is "owned" by the associated
IP Interface. Each method will be discussed below in more detail.
IP address owner allows for the highest possible priority. A Priority
of 255 is reserved for IP Address Owner. In a properly configured
network, there will never be a virtual router with a higher priority
(if there is another virtual router on the same subnet with a priority
of 255, then the network is misconfigured with duplicate IP
Addresses). This means that this virtual router will always assume
Mastership if it is available to do so.
IP address owner features are:
Requires less configuration. The Priorities are automatically
assigned. Backup routers can use the default Priority settings
and correct Master-Backup election will be achieved.
Another IP Address does not have to be reserved for the virtual
router. This is helpful if IP Addresses are scarce or limited.
Configuring IP Routing
9-99