vrrp vrid track interface

Syntax

vrrp vrid virtual-router-id track interface interface-type interface-number [ reduced priority-reduced ]

undo vrrp vrid virtual-router-id track [ interface interface-type interface-number ]

View

Interface view

Default level

2: System level

Parameters

virtual-router-id: VRRP group number, which ranges from 1 to 255.

interface interface-type interface-number: Specifies an interface by its type and number.

reduced priority-reduced: Value by which the priority decrements. priority-reduced ranges from 1 to 255 and defaults to 10.

Description

Use vrrp vrid track interface to configure to track the specified interface.

Use undo vrrp vrid track interface to disable tracking the specified interface.

By default, no interface is tracked.

When the uplink interface of a router in a VRRP group fails, usually the VRRP group cannot be aware of the uplink interface failure. If the router is the master of the VRRP group, hosts on the LAN are not able to access external networks because of the uplink failure. This problem can be solved through tracking a specified uplink interface. After you configure to monitor the uplink interface, when the uplink interface is down or removed, the priority of the master is automatically decreased by a specified value, allowing a higher priority router in the VRRP group to become the master.

Before executing the command, create a VRRP group on an interface and configure the virtual IP address of the VRRP group.

If you configure an interface to be tracked on a router that is the IP address owner in a VRRP group, the configuration does not take effect. If the router is not the IP address owner in the VRRP group later, the configuration takes effect.

When the status of the tracked interface turns from down or removed to up, the corresponding router automatically restores its priority.

Related commands: vrrp vrid track and display vrrp.

Examples

# On VLAN-interface 2, set the interface to be tracked as VLAN-interface 1, making the priority of VRRP group 1 on VLAN-interface 2 decrement by 50 when VLAN-interface 1 is down or removed.

<Sysname> system-view
[Sysname] interface vlan-interface 2
[Sysname-Vlan-interface2] vrrp vrid 1 virtual-ip 10.1.1.1
[Sysname-Vlan-interface2] vrrp vrid 1 track interface vlan-interface 1 reduced 50