KB.15.15

Dynamically changing the priority of the VR

NOTE: You can configure tracked interfaces or VLANs on the backup router only.

Configuring track interface

Syntax

[no] track interface [port-list|trunk-list]

Allows you to specify a port or port list, or trunk or trunk list, that will be tracked

by this virtual router. If the port or trunk is down, the virtual router switches to the

router specified by the priority value. The command is executed in VRID instance

context.

Example:

HP Switch(config)# vlan 25

HP Switch(vlan-25)# vrid 1

HP Switch(vlan-25-vrid-1)# track interface 10-12, Trk1

Configuring track VLAN

NOTE: The VR's operating VLAN cannot be configured as a tracking VLAN for that VR.

Syntax:

[no] track vlan <vlan-id>range

Allows you to specify a VLAN or range of VLANs that will be tracked by this virtual

router. If the VLAN is down, or if the VLAN or IP address has been deleted, the

virtual router switches to the router specified by the priority value. The command is

executed in VRID instance context.

Example:

HP Switch(config)# vlan 25

HP Switch(vlan-25)# vrid 1

HP Switch(vlan-25-vrid-1)# track vlan 10 24-26

NOTE: When the first tracked port or tracked VLAN comes up after being down, the VR waits

for the pre-empt delay time before it tries to take control back. The VR resumes being a backup

with its configured priority as soon as the first tracked entity is up.

The behavior of the VR is not affected by any tracked entities until after the expiration of the preempt

delay time. However, if while waiting for the preempt delay time to expire, a master goes down,

the VR tries to take control of the virtual IP.

Removing all tracked entities

Syntax:

no track

Allows you to remove tracking for all configured track entities (ports, trunks, and

VLANs.) The command is executed in VRID instance context.

256 Virtual Router Redundancy Protocol (VRRP)