Specifications

Determining the VRRP Master
ExtremeWare XOS 11.0 Concepts Guide 253
VRRP Tracking Example
Figure 40 is an example of VRRP tracking.
Figure 40: VRRP tracking
To configure VLAN tracking, as shown in Figure 40, use the following command:
configure vlan vrrp1 add track-vlan vlan1
Using the tracking mechanism, if VLAN1 fails, the VRRP master realizes that there is no path to
upstream router via the master switch and implements a VRRP failover to the backup.
To configure route table tracking, as shown in Figure 40, use the following command:
configure vlan vrrp1 add track-iproute 10.10.10.0/24
The route specified in this command must exist in the IP routing table. When the route is no longer
available, the switch implements a VRRP failover to the backup.
To configure ping tracking, as shown in Figure 40, use the following command:
configure vlan vrrp1 add track-ping 10.10.10.121 frequency 2 miss 2
The specified IP address is tracked. If the fail rate is exceeded, the switch implements a VRRP failover
to the backup. A VRRP node with a priority of 255 may not recover from a ping-tracking failure if there
is a Layer 2 switch between it and another VRRP node. In cases where a Layer 2 switch is used to
connect VRRP nodes, Extreme Networks recommends that those nodes have priorities of less than 255.
Electing the Master Router
VRRP uses an election algorithm to dynamically assign responsibility for the master router to one of the
VRRP routers on the network. A VRRP router is elected master if the router has the highest priority (the
range is 1 to 254; 255 is a reserved number).
EX_067
VRRP master
200.1.1.1/24
(track-vlan)
vlan vlan1
Host 2:
200.1.1.14/24
Gateway:
200.1.1.1
Host 1:
200.1.1.13/24
Gateway:
200.1.1.1
L2 switch
or hub
VRRP backup
200.1.1.2/24
Router
10.10.10.121