Extreme Networks ExtremeWare XOS 11.3, Manual

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Determining the VRRP Master
ExtremeWare XOS 11.3 Concepts Guide
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VRRP Tracking Example
Figure 55 is an example of VRRP tracking.
Figure 55: VRRP tracking
To configure VLAN tracking, as shown in Figure 55 , use the following command:
configure vrrp vlan vrrp1 vrid 2 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 55 , use the following command:
configure vrrp vlan vrrp1 vrid 2 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 55 , use the following command:
configure vrrp vlan vrrp1 vrid 2 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.
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