Cisco IOS XR IP Addresses and Services Command Reference, Release 3.2
VRRP Commands on Cisco IOS XR Software
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VRRP Commands on Cisco IOS XR Software

Table Of Contents

VRRP Commands on Cisco IOS XR Software

interface (VRRP)

router vrrp

show vrrp

vrrp assume-ownership

vrrp ipv4

vrrp preempt

vrrp priority

vrrp text-authentication

vrrp timer

vrrp track interface


VRRP Commands on Cisco IOS XR Software


This document describes the Cisco IOS XR software commands used to configure and monitor the Virtual Router Redundancy Protocol (VRRP).

For detailed information about VRRP concepts, configuration tasks, and examples, see the Cisco IOS XR IP Addresses and Services Configuration Guide.

interface (VRRP)

To enable VRRP interface configuration mode, use the interface command in router configuration mode. To terminate VRRP interface mode, use the no form of this command.

interface type instance

no interface type instance

Syntax Description

type

Interface type. For more information, use the question mark (?) online help function.

instance

Either a physical interface instance or a virtual interface instance:

Physical interface instance. Naming notation is rack/slot/module/port and a slash mark between values is required as part of the notation.

rack: Chassis number of the rack.

slot: Physical slot number of the line card.

module: Module number. A Physical Layer Interface Module (PLIM) is always 0.

port: Physical port number of the interface.

Virtual interface instance. Number range will vary depending on interface type.

For more information about the syntax for the router, use the question mark (?) online help function.


Defaults

VRRP is disabled.

Command Modes

Router configuration

Command History

Release
Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.


Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

You must configure all VRRP configuration commands in VRRP interface configuration mode.

Examples

The following example shows how to configure VRRP and a virtual router 1 on Ten Gigabit Ethernet interface 0/3/0/0:

RP/0/RP0/CPU0:router(config)# router vrrp
RP/0/RP0/CPU0:router(config-vrrp)# interface TenGigE 0/3/0/0
RP/0/RP0/CPU0:router(config-vrrp-if)# vrrp 1 ipv4 10.0.1.20

Related Commands

Command
Description

router vrrp

Configures a VRRP redundancy process.


router vrrp

To configure the Virtual Router Redundancy Protocol (VRRP), use the router vrrp command in global configuration mode. To remove the VRRP configuration, use the no form of this command.

router vrrp

no router vrrp

Syntax Description

The command has no argument or keywords.

Defaults

VRRP is not configured.

Command Modes

Global configuration

Command History

Release
Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.


Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

You must configure all VRRP configuration commands in VRRP interface configuration mode.

Examples

The following example shows how to configure a VRRP with virtual router 1 on Ten Gigabit Ethernet interface 0/3/0/0:

RP/0/RP0/CPU0:router(config)# router vrrp
RP/0/RP0/CPU0:router(config-vrrp)# interface TenGigE 0/3/0/0
RP/0/RP0/CPU0:router(config-vrrp-if)# vrrp 1 priority 254

Related Commands

Command
Description

interface (VRRP)

Enables VRRP interface configuration mode.


show vrrp

To display a brief or detailed status of one or all Virtual Router Redundancy Protocol (VRRP) virtual routers, use the show vrrp command in EXEC mode.

show vrrp [interface type instance [vrid]] [brief | detail | statistics [all]]

Syntax Description

interface

(Optional) Displays the status of the virtual router interface.

type

Interface type. For more information, use the question mark (?) online help function.

instance

Either a physical interface instance or a virtual interface instance:

Physical interface instance. Naming notation is rack/slot/module/port and a slash mark between values is required as part of the notation.

rack: Chassis number of the rack.

slot: Physical slot number of the line card.

module: Module number. A physical layer interface module (PLIM) is always 0.

port: Physical port number of the interface.

Note In references to a Management Ethernet interface located on a route processor card, the physical slot number is alphanumeric (RP0 or RP1) and the module is CPU0.
Example: interface MgmtEth0/RP1/CPU0/0.

Virtual interface instance. Number range varies depending on interface type.

For more information about the syntax for the router, use the question mark (?) online help function.

vrid

(Optional) Virtual router identifier, which is the number identifying the virtual router for which status is displayed.

The virtual router identifier is configured with the vrrp ipv4 command. Range is 1 to 255.

brief

(Optional) Provides a summary view of the virtual router information.

detail

(Optional) Displays detailed running state information.

statistics

(Optional) Displays total statistics.

all

(Optional) Displays statistics for each virtual router.


Defaults

No default behavior or values.

Command Modes

EXEC

Command History

Release
Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.


Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

If no interface is specified, all virtual routers are displayed.

Examples

The following is sample output from the show vrrp command:

RP/0/RP0/CPU0:router# show vrrp 
 
   
                      A indicates IP address owner
                      | P indicates configured to preempt
                      | |
Interface   vrID Prio A P State    Master addr     VRouter addr
Te0/3/0/0      1  100   P Init     unknown         10.0.1.20
Te0/3/0/2      7  100   P Init     unknown         10.1.13.0
 
   

Table 67 describes the significant fields shown in the display.

Table 67 show vrrp Field Descriptions 

Field
Description

Interface

Interface of the virtual router.

vrID

ID of the virtual router.

Prio

Priority of the virtual router.

A

Indicates whether the VRRP router is the IP address owner.

P

Indicates whether the VRRP router is configured to preempt (default).

State

State of the virtual router.

Master addr

IP address of the master router.

VRouter addr

Virtual router IP address of the virtual router.


The following is sample output from the show vrrp detail command:

RP/0/RP0/CPU0:router# show vrrp detail
 
   
TenGigE0/3/0/0 - vrID 1
  State is Init
    0 state changes, last state change never
  Virtual IP address is 10.0.1.20
  Virtual MAC address is 0000.5E00.0101
  Master router is unknown
  Advertise time 1 secs
    Master Down Timer 3.609 (3 x 1 + 156/256)
  Current priority 100
    Configured priority 100, may preempt
      minimum delay 0 secs
TenGigE0/3/0/2 - vrID 7
  State is Init
    0 state changes, last state change never
  Virtual IP address is 10.1.13.0
  Virtual MAC address is 0000.5E00.0107
  Master router is unknown
  Advertise time 1 secs
    Master Down Timer 3.609 (3 x 1 + 156/256)
  Current priority 100
    Configured priority 100, may preempt
      minimum delay 0 secs
TenGigE0/2/0/4 - vrID 2
   State is Master
     16 state changes, last state change 00:04:55
   Virtual IP address is 7.7.7.123
   Virtual MAC address is 0000.5E00.0101
   Master router is local
   Advertise time 1 secs
     Master Down Timer 3.609 (3 x 1 + 156/256)
   Current priority 80
     Configured priority 100, may preempt
       minimum delay 0 secs
  Tracked items: 1/3 up: 20 decrement
                                            Priority
      Interface                  State     Decrement
      POS0/5/0/2                 Down            10
      POS0/5/0/1                 Down            10
      TenGigE0/3/0/3             Up              10
 
   

Table 68 describes the significant fields shown in the displays.

Table 68 show vrrp detail Field Descriptions 

Field
Description

TenGigE0/3/0/0 - vrID 1

Interface type and number, and VRRP group number.

State is

Role this interface plays within VRRP (master or backup).

Virtual IP address is

Virtual IP address for this interface.

Virtual MAC address is

Virtual MAC address for this interface.

Master router is

Location of the master router.

Advertise time

Interval (in seconds) at which the router sends VRRP advertisements when it is the master virtual router. This value is configured with the vrrp timer command.

Master Down Timer

Time the backup router waits for the master router advertisements before assuming the role of master router.

Current priority

Priority of the interface.

Configured priority

Priority configured on the interface.

may preempt

Indication of whether preemption is enabled or disabled.

minimum delay

Delay time before preemption (default) occurs.

Tracked items

Section indicating the items being tracked by the VRRP router.

Interface

Interface being tracked.

State

State of the tracked interface.

Priority Decrement

Priority to decrement from the VRRP priority when the interface is down.


The following is sample output from the show vrrp interface detail command for Ten Gigabit Ethernet interface 0/3/0/0:

RP/0/RP0/CPU0:router# show vrrp interface TenGigE 0/3/0/0 detail
 
   
TenGigE0/3/0/0 - vrID 1
  State is Init
    0 state changes, last state change never
  Virtual IP address is 10.0.1.20
  Virtual MAC address is 0000.5E00.0101
  Master router is local
  Advertise time 1 secs
    Master Down Timer 3.609 (3 x 1 + 156/256)
  Current priority 100
    Configured priority 100, may preempt
      minimum delay 0 secs
 
   

Table 69 describes the significant fields shown in the displays.

Table 69 show vrrp interface Field Descriptions

Field
Description

TenGigE0/3/0/0 - vrID 1

Interface type and number, and VRRP group number.

State is

Role this interface plays within VRRP (master or backup).

Virtual IP address is

Virtual IP address for this interface.

Virtual MAC address is

Virtual MAC address for this interface.

Master router is

Location of the master router.

Advertise time

Interval (in seconds) at which the router sends VRRP advertisements when it is the master virtual router. This value is configured with the vrrp timer command.

Master Down Timer

Time the backup router waits for the master router advertisements before assuming the role of master router.

Current priority

Priority of the interface.

Configured priority

Priority configured on the interface.

may preempt

Indication of whether preemption is enabled or disabled.

minimum delay

Delay time before preemption (default) occurs.


Related Commands

Command
Description

vrrp ipv4

Enables VRRP on an interface and specifies the IP address of the virtual router.


vrrp assume-ownership

To configure a VRRP router to assume ownership of the virtual IP address when in the master state, use the vrrp assume-ownership command in VRRP interface configuration mode. To restore the default setting, use the no form of this command.

vrrp vrid assume-ownership [disable | enable]

no vrrp vrid assume- ownership [disable | enable]

Syntax Description

vrid

Virtual router identifier, which is the number identifying the virtual router for which virtual IP address ownership is being configured.

The virtual router identifier is configured with the vrrp ipv4 command. Range is 1 to 255.

disable

(Optional) Does not accept VRRP packets.

enable

(Optional) Does accept VRRP packets.


Defaults

The master router assumes ownership by default and accepts VRRP packets.

Command Modes

VRRP interface configuration

Command History

Release
Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.


Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

The vrrp assume-ownership command specifies that the router assumes ownership of the virtual IP address if it is the master router regardless of whether it is the IP address owner, which means that it accepts packets sent to that IP address during verification of network configuration. If the vrrp assume-ownership command is enabled, a router that is not the IP address owner, but is the master router for another IP address, accepts and responds to pings and accepts a Telnet to that router. Accepting packets sent to the other IP address is a useful tool during verification of network configuration.

This command is ignored (irrelevant) when the router is the IP address owner (section 6.4.3 of RFC 2338, Virtual Router Redundancy Protocol).

Examples

The following example shows how the configuration disables the vrrp assume-ownership command on ten gigabit Ethernet interface 0/3/0/0:

RP/0/RP0/CPU0:router(config)# router vrrp 
RP/0/RP0/CPU0:router(config-vrrp)# interface TenGigE 0/3/0/0
RP/0/RP0/CPU0:router(config-vrrp-if)# vrrp 1 ipv4 10.0.0.101 
RP/0/RP0/CPU0:router(config-vrrp-if)# vrrp 1 assume-ownership disable

Related Commands

Command
Description

vrrp ipv4

Enables VRRP on an interface and specifies the IP address of the virtual router.


vrrp ipv4

To enable the Virtual Router Redundancy Protocol (VRRP) on an interface and specify the IP address of the virtual router, use the vrrp ipv4 command in VRRP interface configuration mode. To disable VRRP on the interface and remove the IP address of the virtual router, use the no form of this command.

vrrp vrid ipv4 ip-address [secondary]

no vrrp vrid ipv4 ip-address [secondary]

Syntax Description

vrid

Virtual router identifier, which is the number identifying the virtual router. Range is 1 to 255.

ip-address

IP address of the virtual router.

secondary

(Optional) Indicates additional IP addresses supported by this group.


Defaults

VRRP is not configured on the interface.

Command Modes

VRRP interface configuration

Command History

Release
Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.


Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

Configure the vrrp ipv4 command once without the secondary keyword to indicate the virtual router IP address. If you want to indicate additional IP addresses supported by the virtual router, include the secondary keyword.

Removing the VRRP configuration from the IP address owner and leaving the IP address of the interface active is considered a misconfiguration because this results in duplicate IP addresses on the LAN.

Examples

The following example shows how to enable VRRP on Ten Gigabit Ethernet interface 0/3/0/0. The VRRP virtual router identifier is 1, and 10.0.1.20 is the IP address of the virtual router.

RP/0/RP0/1:router(config)# router vrrp
RP/0/RP0/1:router(config-vrrp)# interface TenGigE 0/3/0/0
RP/0/RP0/1:router(config-vrrp-if)# vrrp 1 ipv4 10.0.1.20
RP/0/RP0/1:router(config-vrrp-if)# vrrp 1 ipv4 10.0.2.20 secondary

Related Commands

Command
Description

show vrrp

Displays a summary or detailed status of one or all configured VRRP virtual routers.


vrrp preempt

To configure the router to take over as master router for a Virtual Router Redundancy Protocol (VRRP) virtual router if it has a higher priority than the current master router, use the vrrp preempt command in VRRP interface configuration mode. To disable this preemption, use the no form of this command.

vrrp vrid preempt [delay seconds] [disable | enable]

no vrrp vrid preempt [delay seconds] [disable | enable]

Syntax Description

vrid

Virtual router identifier, which is the number identifying the virtual router for which preemption is being configured.

The virtual router identifier is configured with the vrrp ipv4 command. Range is 1 to 255.

delay seconds

(Optional) Specifies the number of seconds the router delays before issuing an advertisement claiming virtual IP address ownership to be the master router. Range is 1 to 3600 seconds (1 hour). Default is 0 seconds (no delay).

disable

(Optional) Disables preemption.

enable

(Optional) Enables preemption.


Defaults

VRRP preempt is enabled.

seconds: 0

Command Modes

VRRP interface configuration

Command History

Release
Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.


Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

By default, the router being configured with this command takes over as master router for the virtual router if it has a higher priority than the current master router. You can configure a delay, which causes the VRRP router to wait the specified number of seconds before issuing an advertisement claiming virtual IP address ownership to be the master router.


Note The router that is the virtual IP address owner preempts, regardless of the setting of this command.


Examples

The following example shows how to configure the router to preempt the current master router when its priority of 200 is higher than that of the current master router. If the router preempts the current master router, it waits 15 seconds before issuing an advertisement claiming that it is the master router.

RP/0/RP0/CPU0:router(config)# router vrrp
RP/0/RP0/CPU0:router(config-vrrp)# interface TenGigE 0/3/0/0
RP/0/RP0/CPU0:router(config-vrrp-if)# vrrp 1 preempt delay 15
RP/0/RP0/CPU0:router(config-vrrp-if)# vrrp 1 priority 200

Related Commands

Command
Description

vrrp ipv4

Enables VRRP on an interface and specifies the IP address of the virtual router.

vrrp priority

Sets the priority of the virtual router.


vrrp priority

To set the priority of the virtual router, use the vrrp priority command in VRRP interface configuration mode. To remove the priority of the virtual router, use the no form of this command.

vrrp vrid priority priority

no vrrp vrid priority priority

Syntax Description

vrid

Virtual router identifier, which is the number identifying the virtual router for which the priority is being configured.

The virtual router identifier is configured with the vrrp ipv4 command. Range is 1 to 255.

priority

Priority of the virtual router. Range is 1 to 254. Default is 100.


Defaults

priority: 100

Command Modes

VRRP interface configuration

Command History

Release
Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.


Usage Guidelines

To use the vrrp priority command, you must be a member of a user group associated with the vrrp task ID. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

Use this command to control which router becomes the master router. This command is ignored while the router is the virtual IP address owner.

Examples

The following example shows how to configure the router with a priority of 254:

RP/0/RP0/CPU0:router# router vrrp
RP/0/RP0/CPU0:router(config-vrrp)# interface TenGigE 0/3/0/0
RP/0/RP0/CPU0:router(config-vrrp-if)# vrrp 1 priority 254

Related Commands

Command
Description

vrrp ipv4

Enables VRRP on an interface and specifies the IP address of the virtual router.

vrrp preempt

Configures the router to take over as master router for a VRRP virtual router if it has a higher priority than the current master router.


vrrp text-authentication

To configure the simple text authentication used for Virtual Router Redundancy Protocol (VRRP) packets received from other routers running VRRP, use the vrrp text-authentication command in VRRP interface configuration mode. To disable VRRP authentication, use the no form of this command.

vrrp vrid text-authentication string

no vrrp vrid text-authentication [string]

Syntax Description

vrid

Virtual router identifier, which is the number identifying the virtual router for which authentication is being configured.

The virtual router identifier is configured with the vrrp ipv4 command. Range is 1 to 255.

string

Authentication string (up to eight alphanumeric characters) used to validate incoming VRRP packets.


Defaults

No authentication of VRRP messages occurs.

Command Modes

VRRP interface configuration

Command History

Release
Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.


Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

When a VRRP packet arrives from another router in the VRRP group, its authentication string is compared to the string configured on the local system. If the strings match, the message is accepted. If they do not match, the packet is discarded.

All routers within the group must be configured with the same authentication string.


Note Plain text authentication is not meant to be used for security. It simply provides a way to prevent a misconfigured router from participating in VRRP.


Examples

The following example shows how to configure an authentication string of x30dn78k:

RP/0/RP0/CPU0:router# router vrrp
RP/0/RP0/CPU0:router(config-vrrp)# interface TenGigE 0/3/0/0
RP/0/RP0/CPU0:router(config-vrrp-if)# vrrp 1 text-authentication x30dn78k

Related Commands

Command
Description

vrrp ipv4

Enables VRRP on an interface and specifies the IP address of the virtual router.


vrrp timer

To configure the interval between successive advertisements by the master router in a Virtual Router Redundancy Protocol (VRRP) virtual router, use the vrrp timer command in VRRP interface configuration mode. To restore the default value, use the no form of this command.

vrrp vrid timer [msec] interval [force]

no vrrp vrid timer [msec] interval [force]

Syntax Description

vrid

Virtual router identifier, which is the number identifying the virtual router for which timing is being configured.

The virtual router identifier is configured with the vrrp ipv4 command. Range is 1 to 255.

msec

(Optional) Changes the unit of the advertisement time from seconds to milliseconds. Without this keyword, the advertisement interval is in seconds. Range is 20 to 3000 milliseconds.

interval

Time interval between successive advertisements by the master router. The unit of the interval is in seconds, unless the msec keyword is specified. Range is 1 to 255 seconds. Default is 1 second.

force

(Optional) Forces the configured value to be used. This keyword is required if milliseconds is specified.


Defaults

interval: 1 second

Command Modes

VRRP interface configuration

Command History

Release
Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.


Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

Examples

The following example shows how to configure the master router to send advertisements every 4 seconds:

RP/0/RP0/CPU0:router(config)# router vrrp
RP/0/RP0/CPU0:router(config-vrrp)# interface TenGigE 0/3/0/0
RP/0/RP0/CPU0:router(config-vrrp-if)# vrrp 1 timer 4

Related Commands

Command
Description

vrrp ipv4

Enables VRRP on an interface and specifies the IP address of the virtual router.


vrrp track interface

To configure the Virtual Router Redundancy Protocol (VRRP) to track an interface, use the vrrp track interface command in VRRP interface configuration mode. To disable the tracking, use the no form of this command.

vrrp vrid track interface type instance [priority-decrement]

no vrrp vrid track interface type instance [priority-decrement]

Syntax Description

vrid

Virtual router identifier, which is the number identifying the virtual router to which tracking applies.

type

Interface type. For more information, use the question mark (?) online help function.

instance

Either a physical interface instance or a virtual interface instance:

Physical interface instance. Naming notation is rack/slot/module/port and a slash mark between values is required as part of the notation.

rack: Chassis number of the rack.

slot: Physical slot number of the line card.

module: Module number. A physical layer interface module (PLIM) is always 0.

port: Physical port number of the interface.

Note In references to a Management Ethernet interface located on a route processor card, the physical slot number is alphanumeric (RP0 or RP1) and the module is CPU0.
Example: interface MgmtEth0/RP1/CPU0/0.

Virtual interface instance. Number range varies depending on interface type.

For more information about the syntax for the router, use the question mark (?) online help function.

priority-decrement

(Optional) Amount by which the priority for the router is decremented (or incremented) when the tracked interface goes down (or comes back up). Decrements can be set to any value between 1 and 254. Default value is 10.


Defaults

The default decrement value is 10. Range is 1 to 254.

Command Modes

VRRP interface configuration

Command History

Release
Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.


Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

The vrrp track interface command ties the priority of the router to the availability of its interfaces. It is useful for tracking interfaces that are not configured for VRRP. Only IP interfaces are tracked. A tracked interface is up if IP on that interface is up. Otherwise, the tracked interface is down.

You can configure VRRP to track an interface that can alter the priority level of a virtual router for a VRRP virtual router. When the IP protocol state of an interface goes down or the interface has been removed from the router, the priority of the backup virtual router is decremented by the value specified in the priority-decrement argument. When the IP protocol state on the interface returns to the up state, the priority is restored.

Examples

In the following example, Ten Gigabit Ethernet interface 0/3/0/0 tracks interface 0/3/0/3 and 0/3/0/2. If one or both of these two interfaces go down, the priority of the router decreases by 10 (default priority decrement) for each interface. The default priority decrement is changed using the priority-decrement argument. In this example, because the default priority of the virtual router is 100, the priority becomes 90 when one of the tracked interfaces goes down and the priority becomes 80 when both go down. See the vrrp priority command for details on setting the priority of the virtual router.

RP/0/RP0/CPU0:router(config)# router vrrp
RP/0/RP0/CPU0:router(config-vrrp)# interface TenGigE 0/3/0/0
RP/0/RP0/CPU0:router(config-vrrp-if)# vrrp 1 track interface TenGigE 0/3/0/3
RP/0/RP0/CPU0:router(config-vrrp-if)# vrrp 1 track interface TenGigE 0/3/0/2
RP/0/RP0/CPU0:router(config-vrrp-if)# vrrp 1 preempt
RP/0/RP0/CPU0:router(config-vrrp-if)# vrrp 1 ipv4 192.92.72.46

Related Commands

Command
Description

vrrp priority

Sets the priority of the virtual router.