Configuring A Logical Interface To Be Tracked For A Vrrp Group - Juniper EX9200 Features Manual

Configuring a Logical Interface to Be Tracked for a VRRP Group

Copyright © 2017, Juniper Networks, Inc.
VRRP can track whether a logical interface is up, down, or not present, and can also
dynamically change the priority of the VRRP group based on the state of the tracked
logical interface, triggering a new master router election. VRRP can also track the
operational speed of a logical interface and dynamically update the priority of the VRRP
group when the speed crosses a configured threshold.
When interface tracking is enabled, you cannot configure a priority of 255 (a priority of
255 designates the master router). For each VRRP group, you can track up to 10 logical
interfaces.
To configure a logical interface to be tracked, include the following statements:
track {
interface interface-name {
bandwidth-threshold
priority-cost priority;
}
priority-hold-time seconds;
}
interface et-0/0/0 {
priority-cost 30;
}
You can include these statements at the following hierarchy levels:
[edit interfaces interface-name unit logical-unit-number family inet address address
vrrp-group group-id]
[edit interfaces interface-name unit logical-unit-number family inet6 address address
vrrp-inet6-group group-id]
[edit logical-systems logical-system-name interfaces interface-name
unit logical-unit-number family inet address address
[edit logical-systems logical-system-name interfaces interface-name
unit logical-unit-number family inet6 address address
The interface specified is the interface to be tracked for the VRRP group. The priority hold
time is the minimum length of time that must elapse between dynamic priority changes.
A tracking event, such as an interface state change (up or down) or a change in bandwidth,
triggers one of the following responses:
The first tracking event initiates the priority hold timer, and also initializes the pending
priority based on the current priority and the priority cost. However, the current priority
remains unchanged.
A tracking event or a manual configuration change that occurs while the priority hold
timer is on triggers a pending priority update. However, the current priority remains
unchanged.
bits-per-second priority-cost priority;
Chapter 14: Configuring VRRP
vrrp-group group-id]
vrrp-inet6-group group-id]
141