Users Guide

Accept Mode: FALSE, Master AdvInt: 100 centisec
Adv rcvd: 11, Bad pkts rcvd: 0, Adv sent: 0
Virtual MAC address:
00:00:5e:00:02:0a
VRRP in a VRF Configuration
The following example shows how to enable VRRP operation in a VRF virtualized network for the following
scenarios.
• Multiple VRFs on physical interfaces running VRRP.
• Multiple VRFs on VLAN interfaces running VRRP.
To view a VRRP in a VRF configuration, use the show commands.
VRRP in a VRF: Non-VLAN Scenario
The following example shows how to enable VRRP in a non-VLAN.
The following example shows a typical use case in which you create three virtualized overlay networks by
configuring three VRFs in two switches. The default gateway to reach the Internet in each VRF is a static route
with the next hop being the virtual IP address configured in VRRP. In this scenario, a single VLAN is associated
with each VRF.
Both Switch-1 and Switch-2 have three VRF instances defined: VRF-1, VRF-2, and VRF-3. Each VRF has a
separate physical interface to a LAN switch and an upstream VPN interface to connect to the Internet. Both
Switch-1 and Switch-2 use VRRP groups on each VRF instance in order that there is one MASTER and one
backup router for each VRF. In VRF-1 and VRF-2, Switch-2 serves as owner-master of the VRRP group and
Switch-1 serves as the backup. On VRF-3, Switch-1 is the owner-master and Switch-2 is the backup.
In VRF-1 and VRF-2 on Switch-2, the virtual IP and node IP address, subnet, and VRRP group are the same.
On Switch-1, the virtual IP address, subnet, and VRRP group are the same in VRF-1 and VRF-2, but the IP
address of the node interface is unique. There is no requirement for the virtual IP and node IP addresses to be
the same in VRF-1 and VRF-2; similarly, there is no requirement for the IP addresses to be different. In VRF-3,
the node IP addresses and subnet are unique.
Virtual Router Redundancy Protocol (VRRP) 1128