IP Addresses and Services Command Reference for Cisco NCS 5000 Series Routers

address (hsrp)

To enable hot standby protocol for IP, use the address (hsrp) command in the HSRP group submode. To disable hot standby protocol for IP, use the no form of this command.

address { learn | address }

no address { learn | address }

Syntax Description


learn	Learns virtual IP address from peer.
`address`	Hot standby IP address.

Command Default

None

Command Modes

HSRP Group Submode

Command History


Release	Modification

Usage Guidelines

No specific guidelines impact the use of this command.

Task ID


Task ID	Operation
hsrp	read, write

Examples

This example shows how to enable a group to learn the primary virtual IPv4 address from received HSRP control packets:

Router# configure 
Router(config)# router hsrp 
Router(config-hsrp)# interface tenGigE hundredgige 0/4/0/4
Router(config-hsrp-if)# address-family ipv4
Router(config-hsrp-ipv4)# hsrp 1 version 2
Router(config-hsrp-gp)# address learn
Router(config-hsrp-gp)#

Note

The version keyword is available only if IPv4 address-family is selected. By default, version is set to 2 for IPv6 address families.
The HSRP version 2 extended group range must be restricted to 0-255, even though the configuration up to 0-4095 is accepted.

Note

Starting with IOS XR Release 7.4.1, the HSRP version 2 extended group range configurable in the router is restricted to 0-255.

Related Commands


Command	Description
address secondary (hsrp)	Configures the secondary virtual IPv4 address for a virtual router.

address global (HSRP)

To configure the global virtual IPv6 address for the HSRP group, use the address global command in the virtual router submode. To deconfigure the global virtual IPv6 address for the HSRP group, use the no form of this command.

address global ipv6-address

no address global ipv6-address

Syntax Description


`ipv6-address`	Global HSRP IPv6 address.

Command Default

None

Command Modes

HSRP Group Submode, under the IPv6 address-family

Command History


Release	Modification
Release 7.1.1	This command was introduced.

Usage Guidelines

No specific guidelines impact the use of this command.

Task ID


Task ID	Operation
hsrp	read,write

Examples

This example shows how to add a global virtual IPv6 address for the HSRP group:


Router# configure 
Router(config)# router hsrp 
Router(config-hsrp)# interface tenGigE 0/4/0/4
Router(config-hsrp-if)# address-family ipv6
Router(config-hsrp-address-family)# hsrp 3 
Router(config-hsrp-virtual-router)# address global 4000::1000 
Router(config-hsrp-virtual-router)#

Note

The version keyword is available only if IPv4 address-family is selected. By default, version is set to 2 for IPv6 address families.
The HSRP version 2 extended group range must be restricted to 0-255, even though the configuration up to 0-4095 is accepted.

Note

Starting with IOS XR Release 7.4.1, the HSRP version 2 extended group range configurable in the router is restricted to 0-255.

address global subordinate (HSRP)

To configure the global virtual IPv6 address for the subordinate group, use the address global command in the HSRP slave submode. To deconfigure the global virtual IPv6 address for the subordinate group, use the no form of this command.

address global ipv6-address

no address global ipv6-address

Syntax Description


`ipv6-address`	Global VRRP IPv6 address.

Command Default

None

Command Modes

HSRP Slave Submode, under the IPv6 address-family

Command History


Release	Modification
Release 7.1.1	This command was introduced.

Usage Guidelines

No specific guidelines impact the use of this command.

Task ID


Task ID	Operation
hsrp	read,write

Examples

This example shows how to add a global virtual IPv6 address for the subordinate group:


Router# configure 
Router(config)# router hsrp 
Router(config-hsrp)# interface tenGigE 0/4/0/4
Router(config-hsrp-if)# address-family ipv6
Router(config-hsrp-address-family)# hsrp 3 slave
Router(config-hsrp-virtual-router)# address global 4000::1000 
Router(config-hsrp-virtual-router)#

Note

The version keyword is available only if IPv4 address-family is selected. By default, version is set to 2 for IPv6 address families.
The HSRP version 2 extended group range must be restricted to 0-255, even though the configuration up to 0-4095 is accepted.

Note

Starting with IOS XR Release 7.4.1, the HSRP version 2 extended group range configurable in the router is restricted to 0-255.

address linklocal(HSRP)

To either configure the virtual link-local IPv6 address for the HSRP group or to specify that the virtual link-local IPv6 address should be enabled and calculated automatically from the virtual router virtual Media Access Control (MAC) address, use the address linklocal command in the HSRP group submode, under the IPv6 address-family. To deconfigure the virtual link-local IPv6 address forthe HSRP group, use the no form of this command.

address linklocal ipv6-address | autoconfig

no address linklocal ipv6-address | autoconfig

Syntax Description


`ipv6-address`	HSRP IPv6 link-local address.
autoconfig	Autoconfigures the HSRP IPv6 link-local address.

Command Default

None

Command Modes

HSRP Group Submode, under the IPv6 address-family

Command History


Release	Modification
Release 7.1.1	This command was introduced.

Usage Guidelines

When you configure HSRP for IPv6, you must also configure the linklocal IPv6 address using either the ipv6-address argument or the autoconfig keyword. If you configure only the global IPv6 address and commit the changes using the commit keyword, the router does not accept the configuration and displays an error message.

Task ID


Task ID	Operation
hsrp	read, write

Examples

This example shows how to autoconfigure the HSRP IPv6 link-local address:


Router# configure 
Router(config)# router hsrp 
Router(config-hsrp)# interface tenGigE 0/4/0/4
Router(config-hsrp-if)# address-family ipv6
Router(config-hsrp-address-family)# hsrp 3 version 2 
Router(config-hsrp-virtual-router)# address linklocal autoconfig 
Router(config-hsrp-virtual-router)#

This example shows how to configure the virtual link-local IPv6 address for the HSRP group:


Router# configure 
Router(config)# router hsrp 
Router(config-hsrp)# interface tenGigE 0/4/0/4
Router(config-hsrp-if)# address-family ipv6
Router(config-hsrp-address-family)# hsrp 3 
Router(config-hsrp-virtual-router)# address linklocal FE80::260:3EFF:FE11:6770 
Router(config-hsrp-virtual-router)#

Note

The version keyword is available only if IPv4 address-family is selected. By default, version is set to 2 for IPv6 address families.
The HSRP version 2 extended group range must be restricted to 0-255, even though the configuration up to 0-4095 is accepted.

Note

Starting with IOS XR Release 7.4.1, the HSRP version 2 extended group range configurable in the router is restricted to 0-255.

address secondary (hsrp)

To configure the secondary virtual IPv4 address for a virtual router, use the address secondary command in the Hot Standby Router Protocol (HSRP) virtual router submode. To deconfigure the secondary virtual IPv4 address for a virtual router, use the no form of this command.

address address secondary

no address address secondary

Syntax Description


secondary	Sets the secondary HSRP IP address.
`address`	HSRP IPv4 address.

Command Default

None

Command Modes

HSRP virtual router

Command History


Release	Modification
Release 7.1.1	This command was introduced.

Usage Guidelines

No specific guidelines impact the use of this command.

Task ID


Task ID	Operation
hsrp	read, write

Examples

This example shows how to set the secondary virtual IPv4 address for the virtual router:

Router# configure 
Router(config)# router hsrp 
Router(config-hsrp)# interface tenGigE 0/4/0/4
Router(config-hsrp-if)# address-family ipv4
Router(config-hsrp-ipv4)# hsrp 3 version 2
Router(config-hsrp-gp)# address 10.20.30.1 secondary
Router(config-hsrp-gp)#

Note

The version keyword is available only if IPv4 address-family is selected. By default, version is set to 2 for IPv6 address families.
The HSRP version 2 extended group range must be restricted to 0-255, even though the configuration up to 0-4095 is accepted.

Note

Starting with IOS XR Release 7.4.1, the HSRP version 2 extended group range configurable in the router is restricted to 0-255.

authentication (hsrp)

To configure an authentication string for the Hot Standby Router Protocol (HSRP), use the hsrp authentication command in HSRP group submode. To delete an authentication string, use the no form of this command.

authentication string

no authentication [string]

Syntax Description


string	Authentication string. It can be up to eight characters long. The default is 'cisco'.

Command Default

The default authentication string is cisco.

Command Modes

HSRP Group Submode

Command History


Release	Modification
Release 7.1.1	This command was introduced. This command replaces the hsrp authentication command.

Usage Guidelines

The authentication string is sent unencrypted in all HSRP messages. The same authentication string must be configured on all routers and access servers on a LAN to ensure interoperation. Authentication mismatch prevents a device from learning the designated Hot Standby IP address and the Hot Standby timer values from other routers configured with HSRP.

The hsrp authentication command is available for version 1 groups only

Task ID


Task ID	Operations
hsrp	read, write

Examples

This example shows how to configure “company1” as the authentication string required to allow Hot Standby routers in group 1 on tengige hundredgige interface 0/4/0/4 to interoperate:

Router# configure 
Router(config)# router hsrp 
Router(config-hsrp)# interface tenGigE 0/4/0/4
Router(config-hsrp-if)# address-family ipv4
Router(config-hsrp-ipv4)# hsrp 1 version 1 
Router(config-hsrp-gp)# authentication company1
Router(config-hsrp-gp)#

Note

The version keyword is available only if IPv4 address-family is selected. By default, version is set to 2 for IPv6 address families.

Related Commands


Command	Description
show hsrp	Displays HSRP information.

clear hsrp statistics

To reset the Hot Standby Routing Protocol Statistics (HSRP) statistics to zero, use the clear hsrp statistics command in XR EXEC mode.

clear hsrp statistics [ interface interface-type interface-path-id group ]

Syntax Description

interface interface-path-id

Physical interface or virtual interface.

Note

Use the show interfaces command to see a list of all interfaces currently configured on the router.

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

group

(Optional) Group number.

Command Default

None

Command Modes

XR EXEC mode

Command History


Release	Modification
Release 7.1.1	This command was introduced.

Usage Guidelines

No specific guidelines impact the use of this command.

Task ID


Task ID	Operation
hsrp	read, write

Examples

This sample output is from the clear hsrp statistics command:



Router# clear hsrp statistics

Related Commands


Command	Description
show hsrp	Displays HSRP information.

hsrp authentication

To configure an authentication string for the Hot Standby Router Protocol (HSRP), use the hsrp authentication command in HSRP interface configuration mode. To delete an authentication string, use the no form of this command.

hsrp [group-number] authentication string

no hsrp [group-number] authentication [string]

Syntax Description


group-number	(Optional) Group number on the interface to which this authentication string applies. Default is 0.
string	Authentication string. It can be up to eight characters long. The default is 'cisco'.

Command Default

The default group number is 0.

The default authentication string is cisco.

Command Modes

HSRP interface configuration

Command History


Release	Modification
Release 7.1.1	This command was introduced.

Usage Guidelines

The authentication string is sent unencrypted in all HSRP messages. The same authentication string must be configured on all routers and access servers on a LAN to ensure interoperation. Authentication mismatch prevents a device from learning the designated Hot Standby IP address and the Hot Standby timer values from other routers configured with HSRP.

Task ID


Task ID	Operations
hsrp	read, write

Examples

This example shows how to configure “company1” as the authentication string required to allow Hot Standby routers in group 1 on Ten Gigabit Ethernet interface 0/2/0/1 to interoperate:



Router(config)# router hsrp
Router(config-hsrp)# interface TenGigE 0/2/0/1
Router(config-hsrp-if)# hsrp 1 authentication company1

Related Commands


Command	Description
show hsrp	Displays HSRP information.

hsrp delay

To configure the activation delay for the Hot Standby Router Protocol (HSRP), use the hsrp delay command in HSRP interface configuration mode. To delete the activation delay, use the no form of this command.

hsrp delay minimum value reload value

no hsrp delay

Syntax Description


minimum `value`	Sets the minimum delay in seconds for every interface up event. Range is 0 to 10000.
reload `value`	Sets the reload delay in seconds for first interface up event. Range is 0 to 10000.

Command Default

minimum value : 1

reload value : 5

Command Modes

HSRP interface configuration

Command History


Release	Modification
Release 7.1.1	This command was introduced.

Usage Guidelines

The hsrp delay command delays the start of the HSRP finite state machine (FSM) on an interface up event to ensure that the interface is ready to pass traffic. This ensures that there are no mistaken state changes due to loss of hello packets. The minimum delay is applied on all interface up events and the reload delay is applied on the first interface event.

The values of zero must be explicitly configured to turn this feature off.

Task ID


Task ID	Operations
hsrp	read, write

Examples

The following example shows how to configure a minimum delay of 10 seconds with a reload delay of 100 seconds:



Router(config)# router hsrp
Router(config-hsrp)# interface tenGigE 0/RP0/CPU0/0
Router(config-hsrp-if)# hsrp delay minimum 10 reload 100

Related Commands


Command	Description
show hsrp	Displays HSRP information.

hsrp ipv4

To activate the Hot Standby Router Protocol (HSRP), use the hsrp ipv4 command in HSRP interface configuration mode. To disable HSRP, use the no form of this command.

hsrp ipv4 [ ip-address [secondary] ]

no hsrp group-number ipv4 [ ip-address [secondary] ]

Syntax Description


group-number	(Optional) Group number on the interface for which HSRP is being activated. Range is 0 to 255. Default is 0.
ip-address	(Optional) IP address of the Hot Standby router interface.
secondary	(Optional) Indicates that the IP address is a secondary Hot Standby router interface. Useful on interfaces with primary and secondary addresses; you can configure primary and secondary HSRP addresses.

Command Default

group-number : 0

HSRP is disabled by default.

Command Modes

HSRP interface configuration

Command History


Release	Modification
Release 7.1.1	This command was introduced.

Usage Guidelines

The hsrp ipv4 command activates HSRP on the configured interface. If an IP address is specified, that address is used as the designated address for the Hot Standby group. If no IP address is specified, the virtual address is learned from the active router. For HSRP to elect a designated router, at least one router in the Hot Standby group must have been configured with, or must have learned, the designated address. Configuring the designated address on the active router always overrides a designated address that is currently in use.

When the hsrp ipv4 command is enabled on an interface, the handling of proxy Address Resolution Protocol (ARP) requests is changed (unless proxy ARP was disabled). If the Hot Standby state group has been configured with or has learned the designated address, the proxy ARP requests are answered using the MAC address of the Hot Standby group. Otherwise, proxy ARP responses are suppressed.

Configuring secondary Hot Standby router IP addresses is necessary when the interface has secondary IP addresses configured and redundancy must be provided for the networks of these addresses also.

A primary address must be configured before a secondary address. Likewise, a secondary address must be unconfigured before unconfiguring a primary address. All IP addresses can be unconfigured using the no hsrp ipv4 command.

Task ID


Task ID	Operations
hsrp	read, write

Examples

The following example shows how to activate HSRP for group 1 on tengige interface 0/2/0/1. The IP address used by the Hot Standby group is learned using HSRP.



Router(config)# router hsrp
Routerrouter(config-hsrp)# interface tenGigE 0/2/0/1
Router(config-hsrp-if)# hsrp 1 ipv4

Related Commands


Command	Description
hsrp redirects	Configures ICMP redirect messages to be sent when the HSRP is configured on an interface.
show hsrp	Displays HSRP information.

mac-address (hsrp)

To specify a virtual MAC address for the Hot Standby Router Protocol (HSRP), use the hsrp mac-address command in HSRP group submode. To revert to the standard virtual MAC address (0000.0C07.ACn), use the no form of this command.

mac-address address

no mac-address

Syntax Description


address	MAC address.

Command Default

If this command is not configured, and the hsrp use-bia command is not configured, the standard virtual MAC address is used: 0000.0C07.ACn, where n is the group number in hexadecimal. This address is specified in RFC 2281, Cisco Hot Standby Router Protocol (HSRP).

Command Modes

HSRP group submode

Command History


Release	Modification
Release 6.1.2	This command was introduced. This command replaces the hsrp mac-address command

Usage Guidelines

The hsrp mac-address command is not recommended except for IBM networking environments in which first-hop redundancy is based on being able to use a virtual MAC address and in which you cannot change the first-hop addresses in the PCs that are connected to an Ethernet switch.

HSRP is used to help end stations locate the first-hop gateway for IP routing. The end stations are configured with a default gateway. However, HSRP can provide first-hop redundancy for other protocols. Some protocols, such as Advanced Peer-to-Peer Networking (APPN), use the MAC address to identify the first-hop for routing purposes. In this case, it is often necessary to specify the virtual MAC address; the virtual IP address is unimportant for these protocols.

Use the hsrp mac-address command to specify the virtual MAC address. The MAC address specified is used as the virtual MAC address when the router is active. This command is intended for certain APPN configurations.

This table shows the parallel terms between APPN and IP.

Table 1. APPN and IP Parallel Terms
APPN	IP
end node	host
network node	router or gateway

Note

In an APPN network, an end node is typically configured with the MAC address of the adjacent network node. Use the hsrp mac-address command in the routers to set the virtual MAC address to the value used in the end nodes.

Task ID


Task ID	Operations
hsrp	read, write

Examples

If the end nodes are configured to use 4000.1000.1060 as the MAC address of the network node, the command to configure the virtual MAC address is as follows:



Router# configure 
Router(config)# router hsrp 
Router(config-hsrp)# interface HundredGigE 0/4/0/4
Router(config-hsrp-if)# address-family ipv4
Router(config-hsrp-ipv4)# hsrp 1 version 2 
Router(config-hsrp-gp)# mac-address 4000.1000.1060
Router(config-hsrp-gp)#

Note

The version keyword is available only if IPv4 address-family is selected. By default, version is set to 2 for IPv6 address families.
HSRP version 2 provides an extended group range of 0-4095.

Related Commands


Command	Description
show hsrp	Displays HSRP information.

hsrp priority

To configure Hot Standby Router Protocol (HSRP) priority, use the hsrp priority command in HSRP interface configuration mode. To restore the default values, use the no form of this command.

hsrp [group-number] priority priority

no hsrp [group-number] priority priority

Syntax Description


group-number	(Optional) Group number on the interface to which the priority applies. Default is 0.
priority	Priority value that prioritizes a potential Hot Standby router. Range is 1 to 255. Default is 100.

Command Default

group-number : 0

priority : 100

Command Modes

HSRP interface configuration

Command History


Release	Modification
Release 6.0.1	This command was introduced.

Usage Guidelines

The assigned priority is used to help select the active and standby routers. Assuming that preemption is enabled, the router with the highest priority becomes the designated active router. In case of ties, the interface IP addresses are compared, and the interface with the higher IP address has priority.

The priority of the device can change dynamically if an interface is configured with the hsrp track command and another interface on the device goes down.

If preemption is not enabled, the router may not become active even though it might have a higher priority than other HSRP routers.

Task ID


Task ID	Operations
hsrp	read, write

Examples

In the following example, the router has a priority of 120:



Router(config)# router hsrp
Router(config-hsrp)# interface TenGigE 0/2/0/1
Router(config-hsrp-if)# hsrp ipv4 192.168.18.1
Router(config-hsrp-if)# hsrp priority 120

Related Commands


Command	Description
hsrp preempt	Configures HSRP preemption and preemption delay.
hsrp track	Configures an interface so that the Hot Standby priority changes based on the availability of other interfaces.
show hsrp	Displays HSRP information.

hsrp redirects

To configure Internet Control Message Protocol (ICMP) redirect messages to be sent when the Hot Standby Router Protocol (HSRP) is configured on an interface, use the hsrp redirects command in HSRP interface configuration mode. To revert to the default, which is that ICMP messages are enabled, use the no form of this command.

hsrp redirects disable

no hsrp redirects disable

Syntax Description


disable	Disables the filtering of ICMP redirect messages on interfaces configured with HSRP.

Command Default

HSRP ICMP redirects are enabled by default.

Command Modes

HSRP interface configuration

Command History


Release	Modification
Release 7.1.1	This command was introduced.

Usage Guidelines

The hsrp redirects command can be configured on a per-interface basis. When HSRP is first configured on an interface, the setting for that interface inherits the global value. With the hsrp redirects command is enabled, ICMP redirects messages are filtered by replacing the real IP address in the next-hop address of the redirect packet with a virtual IP address if it is known to HSRP.

Task ID


Task ID	Operations
hsrp	read, write

Examples

The following example shows how to allow HSRP to filter redirect messages on tengige interface 0/2/0/1:



Router(config)# router hsrp 
Router(config-hsrp)# interface tenGigE 0/2/0/1 
Router(config-hsrp-if)# hsrp 1 ipv4 192.168.18.1 
Router(config-hsrp-if)# hsrp redirects disable

Related Commands


Command	Description
show hsrp	Displays HSRP information.

hsrp timers

To configure the time between hello packets and the time before other routers declare the active Hot Standby or standby router to be down, use the hsrp timers command in HSRP interface configuration mode. To restore the timers to their default values, use the no form of this command.

hsrp [group-number] timers { hello-seconds | msec hello-milliseconds } { hold-seconds | msec hold-milliseconds }

no hsrp [group-number] timers

Syntax Description


group-number	(Optional) Group number on the interface to which the timers apply. Default is 0.
hello-seconds	Hello interval in seconds. Range is 1 to 255. Default is 3 seconds.
msec `hello-milliseconds`	Hello interval in milliseconds. Range is 100 to 3000 milliseconds.
hold-seconds	Time in seconds before the active or standby router is declared to be down. Range is 1 to 255. Default is 10 seconds.
msec `hold-milliseconds`	Time in milliseconds before the active or standby router is declared to be down. Range is 100 to 3000 milliseconds.

Command Default

group-number : 0

hello-seconds : 3 seconds (If the msec keyword is specified, there is no default value.)

hold-seconds: 10 seconds (If the msec keyword is specified, there is no default value.)

Command Modes

HSRP interface configuration

Command History


Release	Modification
Release 6.0.1	This command was introduced.

Usage Guidelines

Nonactive routers learn timer values from the active router, unless millisecond timer values are being used. If millisecond timer values are being used, all routers must be configured with the millisecond timer values. This rule applies if either the hello time or the hold time is specified in milliseconds.

The timers configured on the active router always override any other timer settings. All routers in a Hot Standby group should use the same timer values. Normally, the hold time is greater than or equal to three times the hello time (holdtime > 3 * hellotime).

You must specify either the hello-seconds argument or the msec keyword and hello-milliseconds argument, depending on whether you want the hello time in seconds or milliseconds. You must also specify either the hold-seconds argument or msec keyword and hold-milliseconds argument, depending on whether you want the hold time in seconds or milliseconds.

Task ID


Task ID	Operations
hsrp	read, write

Examples

The following example shows how to set, for group number 1 on Ten Gigabit Ethernet interface 0/2/0/1, the time between hello packets to 5 seconds and the time after which a router is considered to be down to 15 seconds. The configured timer values are used only if the router is active (or before they have been learned).



Router(config)# router hsrp
Router(config-hsrp)# interface TenGigE 0/2/0/1
Router(config-hsrp-if)# hsrp 1 ipv4
Router(config-hsrp-if)# hsrp 1 timers 5 15

The following example shows how to set, for group number 1 on Ten Gigabit Ethernet interface 0/2/0/1, the time between hello packets to 200 milliseconds and the time after which a router is considered to be down to 1000 milliseconds. The configured timer values are always used because milliseconds have been specified.



Router(config)# router hsrp
Router(config-hsrp)# interface TenGigE 0/2/0/1
Router(config-hsrp-if)# hsrp 1 ipv4 
Router(config-hsrp-if)# hsrp 1 timers msec 200 msec 1000

Related Commands


Command	Description
show hsrp	Displays HSRP information.

hsrp track

To configure an interface so that the Hot Standby priority changes on the basis of the availability of other interfaces, use the hsrp track command in HSRP interface configuration mode. To remove the tracking, use the no form of this command.

hsrp [group-number] track type interface-path-id [priority-decrement]

no hsrp [group-number] track type interface-path-id [priority-decrement]

Syntax Description

group-number

(Optional) Group number on the interface to which the tracking applies. Default is 0.

type

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

interface-path-id

Physical interface or virtual interface.

Note

Use the show interfaces command to see a list of all interfaces currently configured on the router.

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

priority-decrement

(Optional) Amount by which the Hot Standby priority for the router is decremented (or incremented) when the interface goes down (or comes back up). Range is 1 to 255.

Command Default

group-number : 0

priority-decrement : 10

Command Modes

HSRP interface configuration

Command History


Release	Modification
Release 6.0.1	This command was introduced.

Usage Guidelines

The hsrp track command ties the Hot Standby priority of the router to the availability of its interfaces. It is useful for tracking interfaces that are not configured for the Hot Standby Router Protocol (HSRP). Only IP interfaces are tracked. A tracked interface is up if IP on that interface is up. Otherwise, the tracked interface is down.

When a tracked interface goes down, the Hot Standby priority decreases by 10. If an interface is not tracked, its state changes do not affect the Hot Standby priority. For each group configured for Hot Standby, you can configure a separate list of interfaces to be tracked.

The optional priority-decrement argument specifies by how much to decrement the Hot Standby priority when a tracked interface goes down. When the tracked interface comes back up, the priority is incremented by the same amount.

When multiple tracked interfaces are down and priority-decrement values have been configured, these configured priority decrements are cumulative. If tracked interfaces are down, but none of them were configured with priority decrements, the default decrement is 10 and it is cumulative.

The hsrp preempt command must be used in conjunction with this command on all routers in the group whenever the best available router should be used to forward packets. If the hsrp preempt command is not used, then the active router stays active, regardless of the current priorities of the other HSRP routers.

Task ID


Task ID	Operations
hsrp	read, write

Examples

In the following example, Ten Gigabit Ethernet interface 0/2/0/1 tracks interface 0/1/0/1 and 0/3/0/1. If one or both of these two interfaces go down, the Hot Standby priority of the router decreases by 10. Because the default Hot Standby priority is 100, the priority becomes 90 when one of the tracked interfaces goes down and the priority becomes 80 when both go down.



Router(config)# router hsrp
Router(config-hsrp)# interface TenGigE 0/2/0/1
Router(config-hsrp-if)# hsrp track TenGigE 0/1/0/1
Router(config-hsrp-if)# hsrp track TenGigE 0/3/0/1
Router(config-hsrp-if)# hsrp preempt
Router(config-hsrp-if)# hsrp ipv4 192.92.72.46

Related Commands


Command	Description
hsrp preempt	Configures HSRP preemption and preemption delay.
hsrp priority	Configures HSRP priority.
show hsrp	Displays HSRP information.

hsrp use-bia

To configure the Hot Standby Router Protocol (HSRP) to use the burned-in address of the interface as its virtual MAC address, instead of the preassigned MAC address or the functional address, use the hsrp use-bia command in HSRP interface configuration mode. To restore the default virtual MAC address, use the no form of this command.

hsrp use-bia

no hsrp use-bia

Command Default

HSRP uses the preassigned MAC address on Ethernet.

Command Modes

HSRP interface configuration

Command History


Release	Modification
Release 7.1.1	This command was introduced.

Usage Guidelines

It is desirable to configure the hsrp use-bia command on an interface if there are devices that reject Address Resolution Protocol (ARP) replies with source hardware addresses set to a functional address.

Task ID


Task ID	Operations
hsrp	read, write

Examples

In the following example, the burned-in address of tengige interface 0/2/0/1 will be the virtual MAC address mapped to the virtual IP address for all Hot Standby groups configured on tengige interface 0/1/0/1:



Router(config)# router hsrp
Router(config-hsrp)# interface tenGigE 0/2/0/1
Router(config-hsrp-if)# hsrp use-bia

Related Commands


Command	Description
show hsrp	Displays HSRP information.

interface (HSRP)

To enable Hot Standby Router Protocol (HSRP) interface configuration command mode, use the interface command in router configuration mode. To terminate interface mode, use the no form of this command.

interface type interface-path-id

no interface type interface-path-id

Syntax Description

type

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

interface-path-id

Physical interface or virtual interface.

Note

Use the show interfaces command to see a list of all interfaces currently configured on the router.

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

Command Default

HSRP is disabled.

Command Modes

Router HSRP configuration

Command History


Release	Modification
Release 7.1.1	This command was introduced.

Usage Guidelines

All the commands used to configure HSRP are used in HSRP interface configuration mode.

Task ID


Task ID	Operations
hsrp	read, write

Examples

The following example show how to enable HSRP interface configuration mode on tengige 0/2/0/1:




Router(config)# router hsrp
Router(config-hsrp)# interface tenGigE 0/2/0/1
Router(config-hsrp-if)#

Related Commands


Command	Description
router hsrp	Enables HSRP.

preempt (hsrp)

To configure Hot Standby Router Protocol (HSRP) preemption and preemption delay, use the hsrp preempt command in HSRP interface configuration mode. To restore the default values, use the no form of this command.

hsrp [group-number] preempt [ delay seconds ]

no hsrp [group-number] preempt [ delay seconds ]

Syntax Description


group-number	(Optional) Group number on the interface to which the other arguments in this command apply. Default is 0.
delay `seconds`	(Optional) Time in seconds. The `seconds` argument causes the local router to postpone taking over the active role for the specified preempt delay seconds value. Range is 0 to 3600 seconds (1 hour). Default is 0 seconds (no delay).

Command Default

group-number : 0

seconds : 0 seconds (if the router wants to preempt, it does immediately)

Command Modes

HSRP interface configuration

Command History


Release	Modification
Release 7.1.1	This command was introduced.

Usage Guidelines

When the hsrp preempt command is configured, the local router should attempt to assume control as the active router if it has a hot standby priority higher than the current active router. If the hsrp preempt command is not configured, the local router assumes control as the active router only if no other router is currently in the active state.

When a router first comes up, it does not have a complete routing table. If HSRP is configured to preempt, the local HSRP group may become the active router, yet it is unable to provide adequate routing services. This problem can be solved by configuring a delay before the preempting router actually preempts the currently active router.

The preempt delay seconds value does not apply if there is no router currently in the active state. In this case, the local router becomes active after the appropriate timeouts (see the hsrp timers command), regardless of the preempt delay seconds value.

Task ID


Task ID	Operations
hsrp	read, write

Examples

In the following example, the router waits for 300 seconds (5 minutes) after having determined that it should preempt before attempting to preempt the active router. The router might become the active router in a shorter span of time despite the configured delay if no active router is present. Only preempting the active router is delayed.

RP/0/RSP0/CPU0:router# configure
RP/0/RSP0/CPU0:router(config)# router hsrpi 
RP/0/RSP0/CPU0:router(config-hsrp)# interface tenGigE 0/4/0/4
RP/0/RSP0/CPU0:router(config-hsrp-if)# address-family ipv4
RP/0/RSP0/CPU0:router(config-hsrp-ipv4)# hsrp 1 version 2
RP/0/RSP0/CPU0:router(config-hsrp-gp)# preempt delay 300
RP/0/RSP0/CPU0:router(config-hsrp-gp)#

Related Commands


Command	Description
priority (hsrp)	Configures HSRP priority.
track(object)	Configures an interface so that the Hot Standby priority changes based on the availability of other interfaces.
show hsrp	Displays HSRP information.

priority (hsrp)

To configure Hot Standby Router Protocol (HSRP) priority, use the priority command in HSRP group submode. To restore the default values, use the no form of this command.

priority priority

no priority priority

Syntax Description


`priority`	Priority value that prioritizes a potential Hot Standby router. Range is from 1 to 255. Default is 100.

Command Default

The default priority is 100.

Command Modes

HSRP interface configuration

Command History


Release	Modification
Release 7.1.1	This command was introduced.

Usage Guidelines

The assigned priority is used to help select the active and standby routers. Assuming that preemption is enabled, the router with the highest priority becomes the designated active router. In case of ties, the interface IP addresses are compared, and the interface with the higher IP address has priority.

The priority of the device can change dynamically if an interface is configured with the hsrp track command and another interface on the device goes down.

If preemption is not enabled, the router may not become active even though it might have a higher priority than other HSRP routers.

Task ID


Task ID	Operations
hsrp	read, write

Examples

In this example, the router has a priority of 120:

Router# configure 
Router(config)# router hsrp 
Router(config-hsrp)# interface tengige 0/4/0/4
Router(config-hsrp-if)# address-family ipv4
Router(config-hsrp-ipv4)# hsrp 1 version 2
Router(config-hsrp-gp)# priority 120
Router(config-hsrp-gp)#

Note

The version keyword is available only if IPv4 address-family is selected. By default, version is set to 2 for IPv6 address families.
The HSRP version 2 extended group range must be restricted to 0-255, even though the configuration up to 0-4095 is accepted.

Note

Starting with IOS XR Release 7.4.1, the HSRP version 2 extended group range configurable in the router is restricted to 0-255.

Related Commands


Command	Description
preempt (hsrp)	Configures HSRP preemption and preemption delay.
track(object)	Configures an interface so that the Hot Standby priority changes based on the availability of other interfaces.
show hsrp	Displays HSRP information.

router hsrp

To enable the Hot Standby Router Protocol (HSRP), use the router hsrp command in XR Config mode. To disable HSRP, use the no form of this command.

router hsrp

no router hsrp

Syntax Description

This command has no keywords or arguments.

Command Default

HSRP is disabled.

Command Modes

XR Config mode

Command History


Release	Modification
Release 7.1.1	This command was introduced.

Usage Guidelines

HSRP configuration commands must be configured in the HSRP interface configuration mode.

Task ID


Task ID	Operations
hsrp	read, write

Examples

The following example shows how to configure an HSRP redundancy process that contains a virtual router group 1 on tengige 0/2/0/1:


Router(config)# router hsrp
Router(config-hsrp)# interface tenGigE 0/2/0/1
Router(config-hsrp-if)# hsrp 1 priority 254

session name

To configure an HSRP session name, use the session name command in the HSRP group submode. To deconfigure an HSRP session name, use the no form of this command.

name name

Syntax Description


`name`	MGO session name

Command Default

None

Command Modes

HSRP Group Submode

Command History


Release	Modification
Release 7.1.1	This command was introduced.

Usage Guidelines

No specific guidelines impact the use of this command.

Task ID


Task ID	Operation
hsrp	read

Examples

This example shows how to configure an HSRP session name.

Router# configure 
Router(config)# router hsrp 
Router(config-hsrp)# interface tenGigE 0/4/0/4
Router(config-hsrp-if)# address-family ipv4
Router(config-hsrp-ipv4)# hsrp 1 version 2
Router(config-hsrp-gp)# name s1
Router(config-hsrp-gp)#

Note

The version keyword is available only if IPv4 address-family is selected. By default, version is set to 2 for IPv6 address families.
The HSRP version 2 extended group range must be restricted to 0-255, even though the configuration up to 0-4095 is accepted.

Note

Starting with IOS XR Release 7.4.1, the HSRP version 2 extended group range configurable in the router is restricted to 0-255.

show hsrp

To display Hot Standby Router Protocol (HSRP) information, use the show hsrp command in XR EXEC mode mode.

show hsrp [ interface interface-type interface-path-id ] [ group-number ] [ brief | detail ]

Syntax Description

interfaceinterface-type

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

interface-path-id

Physical interface or virtual interface.

Note

Use the show interfaces command to see a list of all interfaces currently configured on the router.

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

group-number

(Optional) Group number on the interface for which output is displayed.

brief

(Optional) A single line of output summarizes each standby group. The brief keyword is the default if detail is not specified.

detail

(Optional) This keyword has the same effect as not specifying brief ; more output is provided.

(Optional) After this vertical bar (|), specify one of these output modifiers and a keyword from the output:

begin —Begins the output from the word that you specify.
exclude —Excludes lines that match the word that you specify.
include —Includes lines that match the word that you specify.

Command Default

By default, a single line of output summarizing each standby group is displayed.

Command Modes

XR EXEC mode

Command History


Release	Modification
Release 7.1.1	This command was introduced.

Usage Guidelines

Use the show hsrp command to display HSRP information.

If you want to specify a value for the group-number argument, you must also specify an interface type and number .

Task ID


Task ID	Operations
hsrp	read

Examples

This is sample output from the show hsrp detail command:


Router# show hsrp detail

tengige 0/4/0/0 - Group 1
  Local state is Active, priority 100
  Hellotime 3 sec holdtime 10 sec
  Next hello sent in 0.539
  Minimum delay 1 sec, reload delay 5 sec
BFD enabled: state none, interval 15 ms multiplier 3 
  Hot standby IP address is 4.0.0.100 configured
  Active router is local
  Standby router is unknown expired
  Standby virtual mac address is 0000.0c07.ac01
  2 state changes, last state change 00:05:20

This table describes the significant fields shown in the display.

Table 2. show hsrp Command Field Descriptions
Field	Description
tengige E0/2/0/4	Interface type and number and Hot Standby group number for the interface.
Local state is	State of local networking device; can be one of the following: Active—Current Hot Standby router. Standby—Router next in line to be the Hot Standby router. Speak—Router is sending packets to claim the active or standby role. Listen—Router is neither active nor standby, but if no messages are received from the active or standby router, it will start to “speak.” Learn—Router is neither active nor standby, nor does it have enough information to attempt to claim the active or standby roles. Init—Router is not yet ready to participate in HSRP, possibly because the associated interface is not up.
Hellotime	Current time (in seconds) between sending of hello packets, learned dynamically from the hello packets received from the active Hot Standby router.
holdtime	Current time (in seconds) before other routers declare the active or standby router to be down, learned dynamically from the hello packets received from the active Hot Standby router.
Next hello sent in	Time in which the software will send the next hello packet (in hours:minutes:seconds).
BFD enabled	Displays BFD related information (with multiplier and minimum interval details)
Hot standby IP address is configured	IP address of the current Hot Standby router. The word “configured” indicates that this address is known through the hsrp ip command. Otherwise, the address was learned dynamically through HSRP hello packets from other routers that do have the HSRP IP address configured.
Active router is	Value can be “local” or an IP address. Address of the current active Hot Standby router.
Standby router is	Value can be “local” or an IP address of the standby router (the router that is next in line to be the Hot Standby router).
Standby virtual mac address is	MAC address associated with the standby group address.
state changes	Number of times the router changed the standby state.
last state change	Time (in hours:minutes:seconds) expired since the last state change.
Tracking interface states for	List of interfaces that are being tracked and their corresponding states. Based on the hsrp track command.
Priority decrement	Value by which the standby priority is decremented or incremented when the tracked interface goes down or up, respectively. Default is 10.

Related Commands


Command	Description
authentication (hsrp)	Configures an authentication string for HSRP.
hsrp ipv4	Activates the HSRP.
preempt (hsrp)	Configures HSRP preemption and preemption delay.
priority (hsrp)	Configures HSRP priority.
timers (hsrp)	Configures the time between hello packets and the time before other routers declare the active Hot Standby or standby router to be down.
track(object)	Configures an interface so that the Hot Standby priority changes based on the availability of other interfaces.

show hsrp mgo

To display Hot Standby Router Protocol (HSRP) mgo information across all interfaces, use the show hsrp mgo command in XR EXEC mode.

show hsrp mgo [ brief | session-name ]

Syntax Description


brief	(Optional) Displays information in a brief format.
`session-name`	(Optional) Display information for a single MGO Session.

Command Default

None

Command Modes

XR EXEC mode

Command History


Release	Modification
Release 7.1.1	This command was introduced.

Usage Guidelines

No specific guidelines impact the use of this command.

Task ID


Task ID	Operation
hsrp	read

Examples

This example shows Hot Standby Router Protocol (HSRP) mgo information for interface HSRP3.



Router# show hsrp mgo HSRP3

HSRP3
  Primary group Bundle-Ether1.1 IPv4 group 1
  State is Active
  Slave groups:
    Interface                 Grp
    Bundle-Ether1.2             2
    Bundle-Ether1.3             3
    Bundle-Ether1.4             4
    Bundle-Ether1.5             5

This example shows Hot Standby Router Protocol (HSRP) mgo information across all interfaces in a brief format.



Router# show hsrp mgo brief

Name            Interface  	   AF   Grp    State Slaves
HSRP1           Gi0/0/0/1       IPv4   1   Active    100
HSRP2           Te0/1/0/0.1     IPv4   2  Standby     50
HSRP3           BE1             IPv4   1   Active      4
HSRP4           BE1             IPv6  10   Active     11

Related Commands


Command	Description
show hsrp	Displays HSRP information.

show hsrp statistics

To display Hot Standby Router Protocol (HSRP) statistics information across all interfaces, use the show hsrp statistics command in XR EXEC mode.

show hsrp [ interface-type interface-path-id | group-number ] statistics

Syntax Description

interface-type interface-path-id

Physical interface or virtual interface.

Note

Use the show interfaces command to see a list of all interfaces currently configured on the router.

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

group-number

(Optional) Group number of the interface.

Command Modes

XR EXEC mode

Command History


Release	Modification
Release 7.1.1	This command was introduced.

Usage Guidelines

No specific guidelines impact the use of this command.

Task ID


Task ID	Operation
hsrp	read

Examples

This sample output is from the show hsrp statistics command:



 Router# show hsrp statistics
Protocol:
  Transitions to Active                 2
  Transitions to Standby                2
  Transitions to Speak                  0
  Transitions to Listen                 2
  Transitions to Learn                  0
  Transitions to Init                   0

Packets Sent:                          12
  Hello:                                7
  Resign:                               0
  Coup:                                 2
  Adver:                                3
 
Valid Packets Received:                 13
  Hello:                                8
  Resign:                               2
  Coup:                                 0
  Adver:                                3

Invalid packets received:               0
  Too long:                             0
  Too short:                            0
  Mismatching/unsupported versions:     0
  Invalid opcode:                       0
  Unknown group:                        0
  Inoperational group:                  0
  Conflicting Source IP:                0
  Failed Authentication:                2
  Invalid Hello Time:                   0
  Mismatching Virtual IP:               0

Related Commands


Command	Description
show hsrp	Displays HSRP information.

show hsrp summary

To display Hot Standby Router Protocol (HSRP) summary information across all interfaces, use the show hsrp summary command in XR EXEC mode mode.

show hsrp summary

Syntax Description

This command has no keywords or arguments.

Command Default

None

Command Modes

XR EXEC mode

Command History


Release	Modification
Release 7.1.1	This command was introduced.

Usage Guidelines

No specific guidelines impact the use of this command.

Task ID


Task ID	Operation
hsrp	read

Examples

This sample output is from the show hsrp summary command:



Router# show hsrp summary
																Groups               VIPs
State 	Sessions Slaves Total     Up  Down  Total
-----   ---------------------   -----------------
ALL          60    900    960    860  2020   2880  

ACTIVE       10    190    200    200   300    500
STANDBY      15    235    250    250   600    850   
SPEAK        10    190    200    200   400    600
LISTEN       10    190    200    200   400    600
LEARN         5      5     10     10    20     30
INIT         10     90    100      0   300    300

48   HSRP IPv4 interfaces    (43   up, 5   down)
5   Tracked IPv4 interfaces (4    up, 1    down)
5    BFD sessions       (3    up, 2    down)

Related Commands


Command	Description
show hsrp	Displays HSRP information.

hsrp slave follow

To instruct the subordinate group to inherit its state from a specified group, use the hsrp slave follow command in HSRP slave submode.

follow mgo-session-name

Syntax Description


`mgo-session-name`	Name of the MGO session from which the subordinate group will inherit the state.

Command Default

None

Command Modes

HSRP Slave Submode

Command History


Release	Modification
Release 7.1.1	This command was introduced.

Usage Guidelines

No specific guidelines impact the use of this command.

Task ID


Task ID	Operation
hsrp	read, write

Examples

This example shows how to instruct the subordinate group to inherit its state from a specified group.



Router# configure 
Router(config)# router hsrp 
Router(config-hsrp)# interface tenGigE 0/4/0/4
Router(config-hsrp-if)# address-family ipv4
Router(config-hsrp-ipv4)# hsrp slave 
Router(config-hsrp-slave)# follow m1

subordinate primary virtual IPv4 address

To configure the primary virtual IPv4 address for the subordinate group, use the subordinate primary virtual IPv4 address command in the HSRP slave submode.

address ip-address

Syntax Description


`ip-address`	IP address of the Hot Standby router interface.

Command Default

None

Command Modes

HSRP Slave Submode

Command History


Release	Modification
Release 7.1.1	This command was introduced.

Usage Guidelines

No specific guidelines impact the use of this command.

Task ID


Task ID	Operation
hsrp	read, write

Examples

This example shows how to configure the primary virtual IPv4 address for the subordinate group.



Router# configure 
Router(config)# router hsrp 
Router(config-hsrp)# interface tenGigE 0/4/0/4
Router(config-hsrp-if)# address-family ipv4
Router(config-hsrp-ipv4)# hsrp slave 
Router(config-hsrp-slave)# address 10.2.1.4

Related Commands


Command	Description
hsrp slave follow	Instructs the subordinate group to inherit its state from a specified group.

subordinate secondary virtual IPv4 address

To configure the secondary virtual IPv4 address for the subordinate group, use the subordinate secondary virtual IPv4 address command in the HSRP slave submode.

address ip-address secondary

Syntax Description


`ip-address`	IP address of the Hot Standby router interface.
secondary	Sets the secondary hot standby IP address.

Command Default

None

Command Modes

HSRP Slave Submode

Command History


Release	Modification
Release 7.1.1	This command was introduced.

Usage Guidelines

No specific guidelines impact the use of this command.

Task ID


Task ID	Operation
hsrp	read, write

Examples

This example shows how to configure the secondary virtual IPv4 address for the subordinate group.



Router# configure 
Router(config)# router hsrp 
Router(config-hsrp)# interface tengige 0/4/0/4
Router(config-hsrp-if)# address-family ipv4
Router(config-hsrp-ipv4)# hsrp slave 
Router(config-hsrp-slave)# address 10.2.1.4 secondary

Related Commands


Command	Description
hsrp slave follow	Instructs the subordinate group to inherit its state from a specified group.

subordinate virtual mac address

To configure the virtual MAC address for the subordinate group, use the subordinate virtual mac address command in the HSRP slave submode.

mac-address address

Syntax Description


`address`	48-bit hardware address of ARP entry.

Command Default

None

Command Modes

HSRP Slave Submode

Command History


Release	Modification
Release 7.1.1	This command was introduced.

Usage Guidelines

No specific guidelines impact the use of this command.

Task ID


Task ID	Operation
hsrp	read, write

Examples

This example shows how to configure the virtual MAC address for the subordinate group.



Router# configure 
Router(config)# router hsrp 
Router(config-hsrp)# interface tenGigE 0/4/0/4
Router(config-hsrp-if)# address-family ipv4
Router(config-hsrp-ipv4)# hsrp slave 
Router(config-hsrp-slave)# mac-address 10.2.4

Related Commands


Command	Description
hsrp slave follow	Instructs the subordinate group to inherit its state from a specified group.

timers (hsrp)

To configure the time between hello packets and the time before other routers declare the active Hot Standby or standby router to be down, use the hsrp timers command in HSRP group submode. To restore the timers to their default values, use the no form of this command.

timers { hello-seconds | msec hello-milliseconds } { hold-seconds | msec hold-milliseconds }

no timers

Syntax Description


hello-seconds	Hello interval in seconds. Range is from 1 to 255. Default is 3.
msec `hello-milliseconds`	Hello interval in milliseconds. Range is from 100 to 3000.
hold-seconds	Time in seconds before the active or standby router is declared to be down. Range is from 1 to 255. Default is 10.
msec `hold-milliseconds`	Time in milliseconds before the active or standby router is declared to be down. Range is from 100 to 3000.

Command Default

The default hello-seconds is 3. (If the msec keyword is specified, there is no default value.)

The default hold-seconds is 10. (If the msec keyword is specified, there is no default value.)

Command Modes

HSRP Group Submode

Command History


Release	Modification
Release 7.1.1	This command was introduced.

Usage Guidelines

Nonactive routers learn timer values from the active router, unless millisecond timer values are being used. If millisecond timer values are being used, all routers must be configured with the millisecond timer values. This rule applies if either the hello time or the hold time is specified in milliseconds.

The timers configured on the active router always override any other timer settings. All routers in a Hot Standby group should use the same timer values. Normally, the hold time is greater than or equal to three times the hello time (holdtime > 3 * hellotime).

You must specify either the hello-seconds argument or the msec keyword and hello-milliseconds argument, depending on whether you want the hello time in seconds or milliseconds. You must also specify either the hold-seconds argument or msec keyword and hold-milliseconds argument, depending on whether you want the hold time in seconds or milliseconds.

Task ID


Task ID	Operations
hsrp	read, write

Examples

This example shows how to set, for group number 1 on Ten Gigabit Ethernet interface 0/2/0/1, the time between hello packets to 5 seconds and the time after which a router is considered to be down to 15 seconds. The configured timer values are used only if the router is active (or before they have been learned).



Router# configure 
Router(config)# router hsrp 
Router(config-hsrp)# interface tengige 0/4/0/4
Router(config-hsrp-if)# address-family ipv4
Router(config-hsrp-ipv4)# hsrp 1
Router(config-hsrp-gp)# timers 5 15
Router(config-hsrp-gp)#

This example shows how to set, for group number 1 on Ten Gigabit Ethernet interface 0/2/0/1, the time between hello packets to 200 milliseconds and the time after which a router is considered to be down to 1000 milliseconds. The configured timer values are always used because milliseconds have been specified.



Router# configure 
Router(config)# router hsrp 
Router(config-hsrp)# interface tenGigE 0/4/0/4
Router(config-hsrp-if)# address-family ipv4
Router(config-hsrp-ipv4)# hsrp 1 version 2
Router(config-hsrp-gp)# timers msec 200 msec 1000
Router(config-hsrp-gp)#

Note

The version keyword is available only if IPv4 address-family is selected. By default, version is set to 2 for IPv6 address families.
The HSRP version 2 extended group range must be restricted to 0-255, even though the configuration up to 0-4095 is accepted.

Note

Starting with IOS XR Release 7.4.1, the HSRP version 2 extended group range configurable in the router is restricted to 0-255.

Related Commands


Command	Description
show hsrp	Displays HSRP information.

track (hsrp)

To configure an interface so that the Hot Standby priority changes on the basis of the availability of other interfaces, use the hsrp track command in HSRP group submode. To remove the tracking, use the no form of this command.

track type interface-path-id [priority-decrement]

no track type interface-path-id [priority-decrement]

Syntax Description

type

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

interface-path-id

Physical interface or virtual interface.

Note

Use the show interfaces command to see a list of all interfaces currently configured on the router.

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

priority-decrement

(Optional) Amount by which the Hot Standby priority for the router is decremented (or incremented) when the interface goes down (or comes back up). Range is 1 to 255.

Command Default

The default priority-decrement is 10.

Command Modes

HSRP Group Submode

Command History


Release	Modification
Release 7.1.1	This command was introduced. This command replaced the hsrp track command.

Usage Guidelines

The hsrp track command ties the Hot Standby priority of the router to the availability of its interfaces. It is useful for tracking interfaces that are not configured for the Hot Standby Router Protocol (HSRP). Only IP interfaces are tracked. A tracked interface is up if IP on that interface is up. Otherwise, the tracked interface is down.

When a tracked interface goes down, the Hot Standby priority decreases by 10. If an interface is not tracked, its state changes do not affect the Hot Standby priority. For each group configured for Hot Standby, you can configure a separate list of interfaces to be tracked.

The optional priority-decrement argument specifies by how much to decrement the Hot Standby priority when a tracked interface goes down. When the tracked interface comes back up, the priority is incremented by the same amount.

When multiple tracked interfaces are down and priority-decrement values have been configured, these configured priority decrements are cumulative. If tracked interfaces are down, but none of them were configured with priority decrements, the default decrement is 10 and it is cumulative.

The hsrp preempt command must be used in conjunction with this command on all routers in the group whenever the best available router should be used to forward packets. If the hsrp preempt command is not used, then the active router stays active, regardless of the current priorities of the other HSRP routers.

Task ID


Task ID	Operations
hsrp	read, write

Examples

This example shows how to configure an interface so that the Hot Standby priority changes on the basis of the availability of other interfaces.

Router# configure 
Router(config)# router hsrp 
Router(config-hsrp)# interface tenGigE 0/4/0/4
Router(config-hsrp-if)# address-family ipv4
Router(config-hsrp-ipv4)# hsrp 1 version 2
Router(config-hsrp-gp)# track tenGigE 0/4/0/4 2 
Router(config-hsrp-gp)#

Note

The version keyword is available only if IPv4 address-family is selected. By default, version is set to 2 for IPv6 address families.
The HSRP version 2 extended group range must be restricted to 0-255, even though the configuration up to 0-4095 is accepted.

Note

Starting with IOS XR Release 7.4.1, the HSRP version 2 extended group range configurable in the router is restricted to 0-255.

Related Commands


Command	Description
preempt (hsrp)	Configures HSRP preemption and preemption delay.
priority (hsrp)	Configures HSRP priority.
show hsrp	Displays HSRP information.

track(object)

To enable tracking of a named object with the specified decrement, use the track (object) command in HSRP group submode. To remove the tracking, use the no form of this command.

track object name [priority-decrement]

no track object name [priority-decrement]

Syntax Description


object `name`	Object tracking. Name of the object to be tracked.
`priority-decrement`	(Optional) Amount by which the Hot Standby priority for the router is decremented (or incremented) when the interface goes down (or comes back up). Range is 1 to 255.

Command Default

The default priority-decrement is 10.

Command Modes

HSRP Group Submode

Command History


Release	Modification
Release 7.1.1	This command was introduced.

Usage Guidelines

No specific guidelines impact the use of this command.

Task ID


Task ID	Operations
hsrp	read, write

Examples

This example shows how to configure object tracking under the HSRP group submode.

Router# configure 
Router(config)# router hsrp 
Router(config-hsrp)# interface tenGigE 0/4/0/4
Router(config-hsrp-if)# address-family ipv4
Router(config-hsrp-ipv4)# hsrp 1 version 2
Router(config-hsrp-gp)# track object t1 2
Router(config-hsrp-gp)#

Note

The version keyword is available only if IPv4 address-family is selected. By default, version is set to 2 for IPv6 address families.
The HSRP version 2 extended group range must be restricted to 0-255, even though the configuration up to 0-4095 is accepted.

Note

Starting with IOS XR Release 7.4.1, the HSRP version 2 extended group range configurable in the router is restricted to 0-255.

Related Commands


Command	Description
preempt (hsrp)	Configures HSRP preemption and preemption delay.
priority (hsrp)	Configures HSRP priority.
show hsrp	Displays HSRP information.

Bias-Free Language

Results

Chapter: HSRP Commands

HSRP Commands

address (hsrp)

Syntax Description

Command Default

Command Modes

Command History

Usage Guidelines

Task ID

Examples

Related Commands

address global (HSRP)

Syntax Description

Command Default

Command Modes

Command History

Usage Guidelines

Task ID

Examples

address global subordinate (HSRP)

Syntax Description

Command Default

Command Modes

Command History

Usage Guidelines

Task ID

Examples

address linklocal(HSRP)

Syntax Description

Command Default

Command Modes

Command History

Usage Guidelines

Task ID

Examples

address secondary (hsrp)

Syntax Description

Command Default

Command Modes

Command History

Usage Guidelines

Task ID

Examples

authentication (hsrp)

Syntax Description

Command Default

Command Modes

Command History

Usage Guidelines

Task ID

Examples

Related Commands

clear hsrp statistics

Syntax Description

Command Default

Command Modes

Command History

Usage Guidelines

Task ID

Examples

Related Commands

hsrp authentication

Syntax Description

Command Default

Command Modes

Command History

Usage Guidelines

Task ID

Examples

Related Commands

hsrp delay

Syntax Description

Command Default

Command Modes

Command History

Usage Guidelines

Task ID