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Normal VRF between 2 routers

ramesub2
Level 1
Level 1

Hi ,

I am configured VRF SW1 and SW2 in the below topo in both R1 and R2, but still i am not able to get the correct output for sh ip ro VRF..

VRF.jpg

Configs in R1 :

ip vrf SW1

rd 100:1

route-target export 100:1

route-target import 100:1

!

ip vrf SW2

rd 100:2

route-target export 100:2

route-target import 100:2

!

interface Serial0/0

ip address 10.1.1.1 255.255.255.0

serial restart-delay 0

!

interface Ethernet1/0

ip vrf forwarding SW2

ip address 20.1.1.1 255.255.255.0

full-duplex

!

interface Ethernet1/1

ip vrf forwarding SW1

ip address 30.1.1.1 255.255.255.0

full-duplex

!

router eigrp 100

network 10.1.1.0 0.0.0.255

no auto-summary

!

address-family ipv4 vrf SW2

  redistribute connected

  network 20.1.1.0 0.0.0.255

  network 0.0.0.0

  auto-summary

  autonomous-system 100

exit-address-family

!

address-family ipv4 vrf SW1

  redistribute connected

  network 30.1.1.0 0.0.0.255

  network 0.0.0.0

  auto-summary

  autonomous-system 100

exit-address-family

!


Configs in R2:

ip vrf SW1

rd 100:1

route-target export 100:1

route-target import 100:1

!

ip vrf SW2

rd 100:2

route-target export 100:2

route-target import 100:2

!

interface Serial0/0

ip address 10.1.1.2 255.255.255.0

serial restart-delay 0

!

interface Ethernet1/0

ip vrf forwarding SW1

ip address 40.1.1.1 255.255.255.0

half-duplex

!

interface Ethernet1/1

ip vrf forwarding SW2

ip address 40.1.1.1 255.255.255.0

half-duplex

!

interface Ethernet1/2

no ip address

shutdown

half-duplex

!

interface Ethernet1/3

no ip address

shutdown

half-duplex

!       

router eigrp 100

network 10.1.1.0 0.0.0.255

no auto-summary

!

address-family ipv4 vrf SW2

  redistribute connected

  network 40.1.1.0 0.0.0.255

  network 0.0.0.0

  auto-summary

  autonomous-system 100

exit-address-family

!

address-family ipv4 vrf SW1

  redistribute connected

  network 40.1.1.0 0.0.0.255

  network 0.0.0.0

  auto-summary

  autonomous-system 100

exit-address-family

!

R1#sh ip route vrf SW1

Routing Table: SW1

Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP

       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

       E1 - OSPF external type 1, E2 - OSPF external type 2

       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

       ia - IS-IS inter area, * - candidate default, U - per-user static route

       o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

     30.0.0.0/24 is subnetted, 1 subnets

C       30.1.1.0 is directly connected, Ethernet1/1

Please kindly give me some suggestion in this....

8 Replies 8

Hi Ramesh,

Inside address-family, change anyone of the VRF's autonomous-system to something other than 100.

Regards,

Smitesh

Hi Smitesh,

as you told i changed in both the ends for the AS, but still it's not working

In R2:

router eigrp 100

network 10.1.1.0 0.0.0.255

no auto-summary

!

address-family ipv4 vrf SW2

  redistribute connected

  network 40.1.1.0 0.0.0.255

  network 0.0.0.0

  auto-summary

  autonomous-system 100

exit-address-family

!

address-family ipv4 vrf SW1

  network 40.1.1.0 0.0.0.255

  auto-summary

  autonomous-system 200

exit-address-family

!

In R1:

router eigrp 100

network 10.1.1.0 0.0.0.255

no auto-summary

!

address-family ipv4 vrf SW2

  redistribute connected

  network 20.1.1.0 0.0.0.255

  network 0.0.0.0

  auto-summary

  autonomous-system 100

exit-address-family

!

address-family ipv4 vrf SW1

  redistribute connected

  network 30.1.1.0 0.0.0.255

  auto-summary

  autonomous-system 200

exit-address-family

!

i have changed the RD also 200:1 in both the routers.

But , if i add any one of the VRF in the Serial 0/0 that perticular VRF is working fine...

Ramesh,

I observer that you have not advertised your Serial link inside the address-family.

Can you advertise the same inside the address-family and check again.

Regards,

Smitesh

Your Serial link is in Global VRF.

You will need to do sub-interfaces on the serial with members in each VRF if you want to run your VRFs between R1 and R2 or do some route leaking between VRF and Global.

ashirkar
Level 7
Level 7

Hello ramesh,

When you configure VRF, router created virtual router and it is locally significant. All configuration is done under VRF.in your case you have 2 vrf instances and one global routing table .When you configure vrf all routing table are independent unless you do special configuration.

Link between r1 and r2 , create sub interface on both site and put it under vrf like shown below

conf t

int s0/0.100

ip vrf forwarding SW1

int s0/0.200

ip vrf forwarding SW2

Hope it helps

Regards,

Ashish

Hi,

I have configured sub interfaces as per your suggession, but it's still not working,

R1:

interface Serial0/0

no ip address

!

interface Serial0/0.100

ip vrf forwarding SW1

ip address 10.1.1.1 255.255.255.0

!

interface Serial0/0.200

ip vrf forwarding SW2

ip address 10.1.1.1 255.255.255.0

!

R2:

interface Serial0/0

no ip address

!

interface Serial0/0.100

ip vrf forwarding SW1

ip address 10.1.1.2 255.255.255.0

!

interface Serial0/0.200

ip vrf forwarding SW2

ip address 10.1.1.2 255.255.255.0

!

R1:

R1#sh ip route vrf SW1

Routing Table: SW1

Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP

       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

       E1 - OSPF external type 1, E2 - OSPF external type 2

       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

       ia - IS-IS inter area, * - candidate default, U - per-user static route

       o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

     10.0.0.0/24 is subnetted, 1 subnets

C       10.1.1.0 is directly connected, Serial0/0.100

     30.0.0.0/24 is subnetted, 1 subnets

C       30.1.1.0 is directly connected, Ethernet1/1

Hello Ramesh,

by default serial interface has HDLC encapsulation change it frame-relay .As you don’t have FR switch in between use back to back FR method.

Hers is config for your routers

R1:

interface Serial0/0

no ip address

encapsulation frame-relay

frame-relay intf-type dce

end

interface Serial0/0.100 point-to-point

ip vrf forwarding SW1

ip address 10.1.1.1 255.255.255.252

frame-relay interface-dlci 101

interface Serial0/0.200 point-to-point

ip vrf forwarding SW2

ip address 10.1.1.1 255.255.255.252

frame-relay interface-dlci 102

end

For R2:

interface Serial0/0

no ip address

encapsulation frame-relay

end

interface Serial0/0.100 point-to-point

ip vrf forwarding SW1

ip address 10.1.1.2 255.255.255.252

frame-relay interface-dlci 101

end

interface Serial0/0.200 point-to-point

ip vrf forwarding SW2

ip address 10.1.1.2 255.255.255.252

frame-relay interface-dlci 102

end

Regards,

Ashish Shirkar

Technical Community Manager - NI

You also need to put the Serial interfaces under the VRF EIGRP process

router eigrp 100

no network 10.1.1.0 0.0.0.255

!

address-family ipv4 vrf SW2

no auto-sum

network 10.1.1.0 0.0.0.255

exit-address-family

!

address-family ipv4 vrf SW1

no auto-sum

network 10.1.1.0 0.0.0.255

exit-address-family

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