Normal VRF between 2 routers

ramesub2 · ‎10-22-2013

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..

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....

smitesh kharecha · ‎10-22-2013

Hi Ramesh,

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

Regards,

Smitesh

ramesub2 · ‎10-22-2013

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...

smitesh kharecha · ‎10-22-2013

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

jamie.grive · ‎10-22-2013

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 · ‎10-22-2013

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

ramesub2 · ‎10-22-2013

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

ashirkar · ‎10-22-2013

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

jamie.grive · ‎10-22-2013

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