Brocade Communications Systems ICX 7250 series, Configuration Manual

Page: 439 / 483

Tracked ports and track priority with VRRP and
VRRP-E
Port tracking allows interfaces not configured for VRRP or VRRP-E to be monitored for link-state changes that can result in dynamic
changes to the VRRP device priority.
A tracked port allows you to monitor the state of the interfaces on the other end of a route path. A tracked interface also allows the virtual
router to lower its priority if the exit path interface goes down, allowing another virtual router in the same VRRP (or VRRP-E) group to
take over. When a tracked interface returns to an up state, the configured track priority is added to the current virtual router priority value.
The following conditions and limitations exist for tracked ports:
• Track priorities must be lower than VRRP or VRRP-E priorities.
• The dynamic change of router priority can trigger a master device switchover if preemption is enabled. However, if the router is
an owner, the master device switchover will not occur.
• The maximum number of interfaces that can be tracked for a virtual router is 16.
• Port tracking is allowed for physical interfaces and port channels.
Tracking ports and setting the VRRP priority
Configuring port tracking on an exit path interface and setting a priority on a VRRP device enables VRRP to monitor the interface. For
VRRP, if the interface goes down, the device priority is set to the priority value and another backup device with a higher priority assumes
the role of master. For VRRP-E, if the interface goes down, the device priority is lowered by the priority value and another backup device
with a higher priority assumes the role of master.
Configure this task on the device on which the tracked interface exists.
1. Enter the configure terminal command to enter global configuration mode.
device# configure terminal
2. Enter the router vrrp command to configure VRRP globally.
device(config)# router vrrp
3. Configure the Ethernet interface.
device(config)# interface ethernet 1/1/6
4. Enter the IP address for the interface to be used for the virtual router ID (VRID).
device(config-if-e1000-1/1/6)# ip address 10.53.5.3/24
5. Enter the following command to enter the appropriate VRRP virtual router ID (VRID) mode.
device(config-if-e1000-1/1/6)# ip vrrp vrid 1
6. Enter the track-port command to set the track port and priority:
device(config-if-e1000-1/1/6-vrid-1)# track-port ethernet 1/2/4 priority 20
The priority value is used when a tracked port goes down and the new priority is set to this value. Ensure that the priority value is
lower than the priority set for any existing master or backup device to force a renegotiation for the master device.
Tracked ports and track priority with VRRP and VRRP-E
Brocade FastIron Layer 3 Routing Configuration Guide
53-1003903-04 439