Configuring VRRP with CLI

This section provides information to configure VRRP using the command line interface.

Topics in this section include:

•	VRRP Configuration Overview

•	Basic VRRP Configurations

•	Common Configuration Tasks

•	Configuring VRRP Policy Components

•	VRRP Configuration Management Tasks

•	Modifying a VRRP Policy

•	Deleting a VRRP Policy

→	Modifying Service and Interface VRRP Parameters

•	Modifying Non-Owner Parameters

•	Modifying Owner Parameters

•	Deleting VRRP on an Interface or Service

VRRP Configuration Overview

Configuring VRRP policies and configuring VRRP instances on interfaces and router interfaces is optional. The basic owner and non-owner VRRP configurations on an IES or router interface must specify the backup ip-address parameter.

VRRP helps eliminate the single point of failure in a routed environment by using virtual router IP address shared between two or more routers connecting the common domain. VRRP provides dynamic fail over of the forwarding responsibility if the master becomes unavailable.

The VRRP implementation allows one master per IP subnet. All other VRRP instances in the same domain must be in backup mode.

 

Preconfiguration Requirements

VRRP policies:

•	VRRP policies must be configured before they can be applied to an interface or IES or VPRN VRRP instance. VRRP policies are configured in the config>vrrp context.

Configuring VRRP on an IES or VPRN service interface:

•	The service customer account must be created prior to configuring an IES or VPRN VRRP instance.

•	The interface address must be specified in the both the owner and non-owner IES, VPRN or router interface instances.

Basic VRRP Configurations

Configure VRRP parameters in the following contexts:

•	VRRP Policy

•	VRRP IES Service Parameters

•	VRRP Router Interface Parameters

 

VRRP Policy

Configuring and applying VRRP policies are optional. There are no default VRRP policies. Each policy must be explicitly defined. A VRRP configuration must include the following:

•

Policy ID

•	Define at least one of the following priority events:

→

Port down

→	LAG port down

→	Host unreachable

→	Route unknown

The following example displays a sample configuration of a VRRP policy.

A:SR2>config>vrrp>policy# info

----------------------------------------------

            delta-in-use-limit 50

            priority-event

                port-down 4/1/2

                    hold-set 43200

                    priority 100 delta

                exit

                port-down 4/1/3

                    priority 200 explicit

                exit

                lag-port-down 1

                    number-down 3

                        priority 50 explicit

                    exit

                exit

                host-unreachable 10.10.24.4

                    drop-count 25

                exit

                route-unknown 10.10.0.0/32

				priority 50 delta

				protocol bgp

                exit

            exit

----------------------------------------------

 

VRRP IES Service Parameters

VRRP parameters are configured within an IES service with two contexts, owner or non-owner. The status is specified when the VRRP configuration is created. When configured as owner, the virtual router instance owns the backup IP addresses. All other virtual router instances participating in this message domain must have the same vrid configured and cannot be configured as owner.

For IPv4, up to 4 virtual routers IDs (vrid) can be configured on an IES service interface. Each virtual router instance can manage up to 16 backup IP addresses. For IPv6, only one virtual router instance can be configured on an IES service interface.

VRRP parameters configured within an IES service must include the following:

•

VRID

•	Backup IP address(es)

The following example displays a sample configuration of a IES service owner and non-owner VRRP configurations.

A:SR2>config>service>ies# info

----------------------------------------------

            interface "tuesday" create

                address 10.10.36.2/24

                sap 7/1/1.2.2 create

                vrrp 19 owner

                    backup 10.10.36.2

                    authentication-key "testabc"

                exit

            exit

            interface "testing" create

                address 10.10.10.16/24

                sap 1/1/55:0 create

                vrrp 12

                    backup 10.10.10.15 

                    policy 1

                    authentication-key "testabc"

                exit

            exit

            no shutdown

----------------------------------------------

A:SR2>config>service>ies#

 

Configure VRRP for IPv6

The following output shows a VRRP for IPV6 configuration example. The interface must be configured first.

*A:nlt7750-3>config>router>router-advert# info 

----------------------------------------------

            interface "DSC-101-Application"

                use-virtual-mac   

                no shutdown

            exit

...

----------------------------------------------

*A:nlt7750-3>config>router>router-advert#

*A:nlt7750-3>config>service>ies# info 

----------------------------------------------

            description "VLAN 921 for DSC-101 Application"

            interface "DSC-101-Application" create

                address 10.152.2.220/28

                vrrp 217

                    backup 10.152.2.222

                    priority 254

                    ping-reply

                exit

                ipv6

                    address FD10:D68F:1:221::FFFD/64 

                    link-local-address FE80::D68F:1:221:FFFD preferred 

                    vrrp 219

                        backup FE80::D68F:1:221:FFFF 

                        priority 254

                        ping-reply

                    exit

                exit

                sap ccag-1.a:921 create

                    description "cross connect to VPLS 921"

                exit

            exit

            no shutdown    

----------------------------------------------

*A:nlt7750-3>config>service>ies#

 

VRRP Router Interface Parameters

VRRP parameters are configured on a router interface with two contexts, owner or non-owner. The status is specified when the VRRP configuration is created. When configured as owner, the virtual router instance owns the backed up IP addresses. All other virtual router instances participating in this message domain must have the same vrid configured and cannot be configured as owner.

For IPv4, up to 4 virtual routers IDs (vrid) can be configured on a router interface. Each virtual router instance can manage up to 16 backup IP addresses. For IPv6, only one virtual router instance can be configured on a router interface.

VRRP parameters configured on a router interface must include the following:

•

VRID

•	Backup IP address(es)

The following example displays a sample configuration of a router interface owner and non-owner VRRP configurations.

A:SR4>config>router# info

#------------------------------------------

echo "IP Configuration "

#------------------------------------------

        interface "system"

            address 10.10.0.4/32

        exit

        interface "test1"

            address 10.10.14.1/24

            secondary 10.10.16.1/24

            secondary 10.10.17.1/24

            secondary 10.10.18.1/24

        exit

        interface "test2"

            address 10.10.10.23/24

            vrrp 1 owner

                backup 10.10.10.23

                authentication-key "testabc"

            exit

        exit

#------------------------------------------

A:SR4>config>router#

Common Configuration Tasks

This section provides a brief overview of the tasks that must be performed to configure VRRP and provides the CLI commands.

VRRP parameters are defined under a service interface or a router interface context. An IP address must be assigned to each IP interface. Only one IP address can be associated with an IP interface but several secondary IP addresses also be associated.

Owner and non-owner configurations must include the following parameters:

•	All participating routers in a VRRP instance must be configured with the same vrid.

•	All participating non-owner routers can specify up to 16 backup IP addresses (IP addresses the master is representing). The owner configuration must include at least one backup IP address.

•	For IPv6, all participating routers must be configured with the same link-local backup address (the one configured for the owner instance.)

Other owner and non-owner configurations include the following optional commands:

•	authentication-key

•

MAC

•	message-interval

In addition to the common parameters, the following non-owner commands can be configured:

•	master-int-inherit

•

priority

•

policy

•	ping-reply

•

preempt

•	telnet-reply

•	ssh-reply (IPv4 only)

•	[no] shutdown

 

Creating Interface Parameters

If you have multiple subnets configured on an Ethernet interface, you can configure VRRP on each subnet.

The following displays an IP interface configuration example:

A:SR1>config>router# info

#------------------------------------------

echo "IP Configuration "

#------------------------------------------

        interface "system"

            address 10.10.0.1/32

        exit

        interface "testA"

            address 123.123.123.123/24

        exit

        interface "testB"

            address 10.10.14.1/24

            secondary 10.10.16.1/24

            secondary 10.10.17.1/24

            secondary 10.10.18.1/24

        exit

        router-id 10.10.0.1

#------------------------------------------

A:SR1>config>router#

Configuring VRRP Policy Components

The following displays a VRRP policy configuration example:

A:SR1>config>vrrp# info

----------------------------------------------

        policy 1

            delta-in-use-limit 50

            priority-event

                port-down 1/1/2

                    hold-set 43200

                    priority 100 delta

                exit

                route-unknown 0.0.0.0/0

                    protocol isis

                exit

            exit

        exit

----------------------------------------------

A:SR1>config>vrrp#

 

Configuring Service VRRP Parameters

VRRP parameters can be configured on an interface in aservice to provide virtual default router support which allows traffic to be routed without relying on a single router in case of failure. VRRP can be configured the following ways:

•	Non-Owner VRRP Example

•	Owner Service VRRP

 

Non-Owner VRRP Example

The following displays a basic non-owner VRRP configuration example:

A:SR2>config>service>ies# info

----------------------------------------------

...

            interface "testing" create

                address 10.10.10.16/24

                sap 1/1/55:0 create

                vrrp 12

                    backup 10.10.10.15 

                    policy 1

                    authentication-key "testabc"

                exit

            exit

            no shutdown

----------------------------------------------

A:SR2>config>service>ies#

 

Owner Service VRRP

The following displays the owner VRRP configuration example:

A:SR4>config>router# info

#------------------------------------------

echo "IP Configuration "

#------------------------------------------

...

        interface "test2"

            address 10.10.10.23/24

            vrrp 1 owner

                backup 10.10.10.23

                authentication-key "testabc"

            exit

        exit

#------------------------------------------

A:SR4>config>router#

 

Configuring Router Interface VRRP Parameters

VRRP parameters can be configured on an interface in an interface to provide virtual default router support which allows traffic to be routed without relying on a single router in case of failure.

VRRP can be configured the following ways:

•	Router Interface VRRP Non-Owner

 

Router Interface VRRP Non-Owner

The following displays a non-owner interface VRRP configuration example:

A:SR2>config># info 
#------------------------------------------

	interface "if-test"

            address 10.20.30.40/24

            secondary 10.10.50.1/24

            secondary 10.10.60.1/24

            secondary 10.10.70.1/24

            vrrp 1

                backup 10.10.50.2

                backup 10.10.60.2

                backup 10.10.70.2

                backup 10.20.30.41

                ping-reply

                telnet-reply

                authentication-key "testabc"

            exit

        exit

#------------------------------------------

A:SR2>config># 

 

Router Interface VRRP Owner

The following displays router interface owner VRRP configuration example:

A:SR2>config>router# info 
#------------------------------------------

	interface "vrrpowner"

            address 10.10.10.23/24

            vrrp 1 owner

                backup 10.10.10.23

                authentication-key "testabc"

            exit

        exit

#------------------------------------------

A:SR2>config>router# 

VRRP Configuration Management Tasks

This section discusses the following VRRP configuration management tasks:

•	Modifying a VRRP Policy

•	Deleting a VRRP Policy

•	Modifying Service and Interface VRRP Parameters

→	Modifying Non-Owner Parameters

→	Modifying Owner Parameters

→	Deleting VRRP on an Interface or Service

 

Modifying a VRRP Policy

To access a specific VRRP policy, you must specify the policy ID. To display a list of VRRP policies, use the show vrrp policy command.

The following example displays the modified VRRP policy configuration:

A:SR2>config>vrrp>policy# info

----------------------------------------------

            delta-in-use-limit 50

            priority-event

                port-down 1/1/2

                    hold-set 43200

                    priority 100 delta

                exit

                port-down 1/1/3

                    priority 200 explicit

                exit

                host-unreachable 10.10.24.4

                    drop-count 25

                exit

            exit

----------------------------------------------

A:SR2>config>vrrp>policy#

 

Deleting a VRRP Policy

Policies are only applied to non-owner VRRP instances. A VRRP policy cannot be deleted if it is applied to an interface or to an IES service. Each instance in which the policy is applied must be deleted.

The Applied column in the following example displays whether or not the VRRP policies are applied to an entity.

A:SR2#

===============================================================================

VRRP Policies

===============================================================================

Policy    Current             Current      Current      Delta       Applied    

Id        Priority & Effect   Explicit     Delta Sum    Limit                  

-------------------------------------------------------------------------------

1	  200 Explicit        200          100          50          Yes

15 	  254                 None         None         1           No

32 	  100                 None         None         1           No

===============================================================================

A:SR2#

 

Modifying Service and Interface VRRP Parameters

 

Modifying Non-Owner Parameters

Once a VRRP instance is created as non-owner, it cannot be modified to the owner state. The vrid must be deleted and then recreated with the owner keyword to invoke IP address ownership.

 

Modifying Owner Parameters

Once a VRRP instance is created as owner, it cannot be modified to the non-owner state. The vrid must be deleted and then recreated without the owner keyword to remove IP address ownership.

Entering the owner keyword is optional when entering the vrid for modification purposes.

 

Deleting VRRP on an Interface or Service

The vrid does not need to be shutdown to remove the virtual router instance from an interface or service.

Example: config>router#interface

config>router# interface if-test

config>router>if# shutdown

config>router>if# exit

config>router# no interface if-test

config>router#

 

The following example displays the command usage to delete a VRRP instance from an interface or IES service:

Example: config>service#ies 10

config>service>ies# interface “test”

config>service>ies>if# vrrp 1

config>service>ies>if>vrrp# shutdown

config>service>ies>if>vrrp# exit

config>service>ies>if# no vrrp 1

config>service>ies>if# exit all