T Commands

This chapter describes the Cisco NX-OS Virtual Router Redundancy Protocol (VRRP) commands that begin with T.

track (VRRP)

To modify the priority for a virtual router based on a tracked object, use the track command. To disable priority tracking for a virtual router, use the no form of this command.

track object-number [ decrement value ]

no track object-number [ decrement value ]

 
Syntax Description

object-number

Number for a configured tracked object. The range is from 1 to 500.

decrement value

(Optional) Decrements the VRRP priority if the tracked object is down. The range is from 1 to 254.

 
Command Default

None

 
Command Modes

VRRP configuration mode

 
Command History

Release
Modification

6.0(2)N1(1)

This command was introduced.

 
Usage Guidelines

Use the track (VRRP) command to change the priority of the virtual router based on the state of a configured tracked object. Use the track command to configure the tracked object. When the tracked object is down, the priority reverts to the priority value for the virtual router. When the tracked object is up, the priority of the virtual router is restored to the original value.

This command does not require a license.

Examples

This example shows how to enable object tracking for a virtual router:

switch# configure terminal
switch(config)# track 33 ip route 192.0.2.0/24 reachability
switch(config)# interface ethernet 2/1
switch(config-if)# no switchport
switch(config-if)# vrrp 250
switch(config-if-vrrp)# track 33 priority 2
switch(config-if-vrrp)#

 
Related CommandsI

Command
Description

feature vrrp

Enables VRRP.

show vrrp

Displays VRRP configuration information.

track interfave (VRRP)

Tracks the state of an interface and modifies the VRRP priority if that interface state goes down.

vrrp

Configures a VRRP group.

 

track interface (VRRP)

To track the priority for a virtual router based on an interface, use the track interface command. To disable priority tracking for a virtual router, use the no form of this command.

track interface { ethernet slot / port | port-channel number [. sub_if_number ]} priority value

no track interface { ethernet slot / port | port-channel number [. sub_if_number ]} priority value

 
Syntax Description

ethernet slot / port

Specifies the virtual router interface for which to track the priority. The slot number is from 1 to 255, and the port number is from 1 to 128.

port-channel number

Specifies the port-channel group for which to track priority. The range is from 1 to 4096

sub_if-number

(Optional) Subinterface number. The range is from 1 to 4093.

priority value

Specifies the interface priority for a virtual router. The range of values is from 1 to 254. If this router is the owner of the IP addresses, the value is automatically set to 254.

 
Command Default

Disabled

 
Command Modes

VRRP configuration mode

 
Command History

Release
Modification

6.0(2)N1(1)

This command was introduced.

 
Usage Guidelines

Use the track command to change the priority of the virtual router based on the state of another interface in the switch. When the tracked interface is down, the priority reverts to the priority value for the virtual router. When the tracked interface is up, the priority of the virtual router is restored to the interface state tracking value.

Note Interface state tracking will not be operational unless you enable preemption on the interface.

This command does not require a license.

Examples

This example shows how to enable interface state tracking for a virtual router:

switch# configure terminal
switch(config)# interface ethernet 2/1
switch(config-if)# no switchport
switch(config-if)# vrrp 250
switch(config-if-vrrp)# track interface ethernet 2/2 priority 2
switch(config-if-vrrp)#
 

 
Related CommandsI

Command
Description

feature vrrp

Enables VRRP.

show vrrp

Displays VRRP configuration information.

track (VRRP)

Tracks an object to modify the VRRP priority.

vrrp

Configures a VRRP group.