VRF lite: unreachable

Answered Question
May 1st, 2012

I was configuring two routers connected to each other with serial0/1 interfaces. I configured ip vrf forwarding on the sub interfaces however both routers cannot reach each other through the vrf instances.



vrf13#

!

interface Serial0/1.1

ip vrf forwarding test

ip address 1.1.1.1 255.255.255.252

end

!

ip vrf test

rd 13:1

vrf14#

!

interface Serial0/1.1

ip vrf forwarding test

ip address 1.1.1.2 255.255.255.252

end

ip vrf test

ip vrf forwarding test

vrf14#

vrf13#sh ip vrf test

  Name                             Default RD          Interfaces

  test                             13:1                Se0/1.1

vrf13#

vrf13#sh ip route vrf test | begin Gateway

Gateway of last resort is not set

     1.0.0.0/30 is subnetted, 1 subnets

C       1.1.1.0 is directly connected, Serial0/1.1

vrf13#

vrf13#show ip interface brief | i Serial0/1.1

Serial0/1.1                1.1.1.1         YES manual up                    up

vrf13#

vrf14#sh ip vrf test

  Name                             Default RD          Interfaces

  test                             14:1                Se0/1.1

vrf14#

vrf14#sh ip route vrf test | begin Gateway

Gateway of last resort is not set

     1.0.0.0/30 is subnetted, 1 subnets

C       1.1.1.0 is directly connected, Serial0/1.1

vrf14#

vrf14#show ip interface brief | i Serial0/1.1

Serial0/1.1                1.1.1.2         YES manual up                    up

vrf14#

vrf13#ping vrf test 1.1.1.2

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 1.1.1.2, timeout is 2 seconds:

.....

Success rate is 0 percent (0/5)

vrf13#

vrf14#ping vrf test 1.1.1.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds:

.....

Success rate is 0 percent (0/5)

No frame relay, it is just a router to router connection.

Did I miss anything? Just vrf lite without bgp....i suppose i do not need to use export rt and import rt since there is no bgp....

I have this problem too.
0 votes
Correct Answer by kristianbrun about 1 year 11 months ago

It should work. Can you ping the interfaces without vrf forwarding enabled on the interfaces?

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Correct Answer
kristianbrun Tue, 05/01/2012 - 10:12

It should work. Can you ping the interfaces without vrf forwarding enabled on the interfaces?

Sent from Cisco Technical Support iPhone App

rakyomin78 Tue, 05/01/2012 - 18:49

Problem is not with route distinguisher

vrf14#

!

interface Serial0/1.1

ip vrf forwarding test

ip address 1.1.1.2 255.255.255.252

end

vrf14#sh ip vrf test

  Name                             Default RD          Interfaces

  test                             14:1                Se0/1.1

vrf14#

Even without route distinguisher, it will work on the interface level by merely define the ip vrf instance as shown in one of the post by packetlife.

I have written the findings here https://cyruslab.wordpress.com/2012/05/02/mpls-vpn-vrf/
I used fa interface instead of serial interface.

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Posted May 1, 2012 at 9:59 AM
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