16.1. VRF Commands

Command Purpose

To configure a VPN routing and forwarding (VRF) routing table, use the ip vrf command in Global Config mode. To remove a VRF routing table, use the no form of this command.

Prerequisites

Command Syntax

ip vrf VRF-NAME

no ip vrf VRF-NAME

Command Mode

Global Config

Default

None

Usage

None

Examples

Switch# configure terminal
Switch(config)# ip vrf ComA
Switch(config-vrf)# route-target both 100:2
Switch(config-vrf)# route-target import 200:1

Related Commands

ip vrf forwarding

Command Purpose

To show the set of defined VRFs and assocaited interfaces, use the show ip vrf command in Privileged EXEC mode.

Prerequisites

Command Syntax

show ip vrf ( bgp ( brief | detail ) | interfaces | ospf | rip | VRF-NAME | )

Command Mode

Privileged EXEC

Default

None

Usage

None

Examples

Switch# show ip vrf

Related Commands

None

Command Purpose

To associate a VPN routing and forwarding (VRF) instance with an Layer3 interface, use the ip vrf forwarding command in interface configuration mode. To disassociate a VRF, use the no form of this command.

Prerequisites

Command Syntax

ip vrf forwarding VRF-NAME

no ip vrf forwarding

Command Mode

Interface Configuration

Default

None

Usage

Executing this command on an interface removes the IP address on this interface, The IP address should be reconfigured.

Examples

Switch# configure terminal
Switch(config)# ip vrf ComA
Switch(config-vrf)# exit
Switch(config)# interface eth-0-1
Switch(config-if)# no switchport
Switch(config-if)# ip vrf forwarding ComA

Related Commands

ip vrf

ip route vrf

Command Purpose

To establish static routes for a VPN routing and forwarding (VRF) instance, use the ip route vrf command in Global Config mode. To remove static routes, use the no form of this command.

Prerequisites

Command Syntax

ip route vrf VRF-NAME ( PREFIX MASK | PREFIX/PREFIX-LENGTH ) ( NH-ADDRESS ( public | ) | vrf VRF-NAME NH-ADDRESS | IFNAME | REMOTE-VTEP ) ( DISTANCE | ) ( bind bfd BFD-NAME | track NUMBER | )

no ip route vrf VRF-NAME ( PREFIX MASK | PREFIX/PREFIX-LENGTH ) ( NH-ADDRESS ( public | ) | vrf VRF-NAME NH-ADDRESS | IFNAME | REMOTE-VTEP | ) ( bind bfd | track | )

Command Mode

Global Config

Default

None

Usage

None

Examples

Switch# configure terminal
Switch(config)# ip route vrf VPN-NAME 2.2.2.0/24 1.1.1.2

Related Commands

show ip route vrf

Command Purpose

To add a permanent entry in the Address Resolution Protocol (ARP) cache for VRF, use the arp vrf command in Global Config mode. To remove an entry from VRF ARP cache, enter the no form of this command.

Prerequisites

Command Syntax

arp vrf VRF_NAME IP_ADDR MAC

no arp vrf VRF_NAME IP_ADDR

Command Mode

Global Config

Default

None

Usage

None

Examples

Switch# configure terminal
Switch(config)# arp vrf vpn3 1.1.1.1 0000.1111.2222

Related Commands

show ip arp vrf VRF-NAME

clear ip arp vrf VRF-NAME A.B.C.D

Command Purpose

Use this command to show arp entry in VRF instance.

Prerequisites

Command Syntax

show ip arp vrf VRF-NAME

Command Mode

Privileged EXEC

Default

None

Usage

None

Examples

This example shows how to display all arp entry in the arp table of the VRF:

Switch# show ip arp vrf ComA
 

 Protocol    Address          Age (min)  Hardware Addr   Interface 
 Internet    1.1.1.1                 -   0000.1111.2222 

Related Commands

arp vrf

Command Purpose

Use this command to refresh a specific dynamic ARP entry from ARP cache for the VRF.

Prerequisites

Command Syntax

clear ip arp vrf VRF-NAME IP_ADDR

Command Mode

Privileged EXEC

Default

None

Usage

None

Examples

This example shows how to refresh a dynamic arp entry in VRF.:

Switch# clear ip arp vrf ComA 1.1.1.1

Related Commands

arp vrf

Command Purpose

Use this command to ping address in VRF.

Prerequisites

Command Syntax

ping vrf VRF-NAME IPV4_HOST

Command Mode

Privileged EXEC

Default

None

Usage

None

Examples

Switch# ping vrf vpn 1.1.1.1

PING 1.1.1.1 (1.1.1.1) 56(84) bytes of data.
64 bytes from 1.1.1.1: icmp_seq=0 ttl=64 time=0.114 ms
64 bytes from 1.1.1.1: icmp_seq=1 ttl=64 time=0.087 ms
64 bytes from 1.1.1.1: icmp_seq=2 ttl=64 time=0.087 ms
64 bytes from 1.1.1.1: icmp_seq=3 ttl=64 time=0.097 ms
64 bytes from 1.1.1.1: icmp_seq=4 ttl=64 time=0.133 ms
--- 1.1.1.1 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4041ms
rtt min/avg/max/mdev = 0.087/0.103/0.133/0.020 ms, pipe 2

Related Commands

None

Command Purpose

Use this command to trace route in VRF.

Prerequisites

Command Syntax

traceroute vrf VRF-NAME IPV4_HOST

Command Mode

Privileged EXEC

Default

None

Usage

None

Examples

Switch# traceroute vrf vpn 1.1.1.1

traceroute to 1.1.1.1 (1.1.1.1), 30 hops max, 38 byte packets
 1  1.1.1.1 (1.1.1.1)  0.222 ms  0.169 ms  0.169 ms

Related Commands

None

Command Purpose

Use this command to telnet in VRF.

Prerequisites

Command Syntax

telnet vrf VRF-NAME WORD

Command Mode

Privileged EXEC

Default

None

Usage

None

Examples

Switch# telnet vrf vpn 9.9.9.2

Trying 9.9.9.2...
Connected to 9.9.9.2.
Escape character is '^]'.
Fedora Core release 4 (Stentz)
Kernel 2.6.32.23 on an i686
login: root
Password:

Related Commands

None

Command Purpose

Use this command to set route distinguisher.

Prerequisites

Command Syntax

rd RD-VALUE

Command Mode

VRF Configuration

Default

None

Usage

None

Examples

Switch# configure terminal
Switch(config)# ip vrf test
Switch(config-vrf)# rd 1.1.1.1:1

Related Commands

None

Command Purpose

Use this command to set route target. To unset route target, enter the no form of this command.

Prerequisites

Command Syntax

route-target ( both | export | import ) RT-VALUE

no route-target ( both | export | import ) ( RT-VALUE | )

Command Mode

VRF Configuration

Default

None

Usage

None

Examples

Switch# configure terminal
Switch(config)# ip vrf test
Switch(config-vrf)# route-target import 100:1

Related Commands

None

Command Purpose

Use this command to set import map. To unset import map, enter the no form of this command.

Prerequisites

Command Syntax

import map WORD

no import map

Command Mode

VRF Configuration

Default

None

Usage

None

Examples

Switch# configure terminal
Switch(config)# ip vrf test
Switch(config-vrf)# import map 100

Related Commands

export map

Command Purpose

Use this command to set export map. To unset export map, enter the no form of this command.

Prerequisites

Command Syntax

export map WORD

no export map

Command Mode

VRF Configuration

Default

None

Usage

None

Examples

Switch# configure terminal
Switch(config)# ip vrf test
Switch(config-vrf)# export map 100

Related Commands

import map

Command Purpose

Use this command to set router-id.To unset router-id, enter the no form of this command.

Prerequisites

Command Syntax

router-id IP_ADDR

no router-id

Command Mode

VRF Configuration

Default

None

Usage

None

Examples

Switch# configure terminal
Switch(config)# ip vrf test
Switch(config-vrf)# router-id 1.1.1.1

Related Commands

show ip vrf

Command Purpose

Use this command to specific VRF description. To remove VRF description, enter the no form of this command.

Prerequisites

Command Syntax

description LINE

no description

Command Mode

VRF Configuration

Default

None

Usage

None

Examples

Switch# configure terminal
Switch(config)# ip vrf test
Switch(config-vrf)# description VrfName1

Related Commands

show ip vrf

Command Purpose

Use this command to display the resources used by vrfs.

Prerequisites

Command Syntax

show resource vrf

Command Mode

Privileged EXEC

Default

None

Usage

None

Examples

The following is sample output from the show resource vrf command:

Switch# show resource vrf

VRF
Resource                         Used          Capability
=============================================================
VRF number                        1                252

Related Commands

None