How to configure IS-IS with VRF ?-->( In router mode, vrf <vrf_name> is not working. In globle mode, router isis <tag> vrf <vrf_name> is not working

[shyam4050]

Hi All,

I am trying below set up in gns3 with Cisco IOS Software, 2600 Software (C2691-ADVIPSERVICESK9-M), Version 12.4(15)T6, RELEASE SOFTWARE (fc2).

PFB :

R2#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
R2(config)#do sh ip vrf
  Name                             Default RD          Interfaces
  CSC                              100:1               Fa0/0
R2(config)#do sh run | sec vrf
ip vrf CSC
rd 100:1
route-target export 100:1
route-target import 100:1
ip vrf forwarding CSC
R2(config)#do sh run | sec isis
ip router isis 1
router isis 1
net 49.0001.0000.0002.00

R2(config)#do sh run int f0/0
Building configuration...

Current configuration : 134 bytes
!
interface FastEthernet0/0
ip vrf forwarding CSC
ip address 10.1.2.2 255.255.255.0
ip router isis 1
duplex auto
speed auto
end

R2(config)#router isis 1 ?
  <cr>

R2(config)#router isis 1 vrf?
% Unrecognized command
R2(config)#router isis 1
R2(config-router)#v?
% Unrecognized command
R2(config-router)#v

[Peter Paluch]

Hi shyam,

Unfortunately, these IOSes do not support per-VRF IS-IS instances. There may be IOS images for 7200 router series that will support this feature (IOS 15.x).

You might want to consider trying VIRL (http://virl.cisco.com) - it is equipped with very recent IOS versions and will provide you with most features found only on recent platforms.

Best regards,
Peter

[shyam4050]

Hi Peter,

Thanks.

I will try differet IOS version for it.

BR

shyam

[Vinit Jain]

Hello Shyam

Please refer to the below config for VRF aware isis:

ip vrf ABC
 rd 1:1
 route-target export 1:1
 route-target import 1:1
!
!
interface GigabitEthernet0/2
 ip vrf forwarding ABC
 ip address 10.1.21.1 255.255.255.252
 ip router isis 
 duplex auto
 speed auto
 media-type rj45
!
interface Loopback10
 ip vrf forwarding ABC
 ip address 192.168.100.100 255.255.255.255
 ip router isis 
!
router isis 
 vrf ABC 
 net 47.0000.0000.0001.00
 is-type level-1
 metric-style wide
!

R1#show isis nei
Tag null:
System Id Type Interface IP Address State Holdtime Circuit Id
R3 L1 Gi0/2 10.1.21.2 UP 24 R1.01 
R1#

Hope this helps.

Regards

Vinit

[Vinit Jain]

Just forgot to mention, this was tried on 15.x release. You may try similar configuration method on the IOS that you are running and see if that helps.

Regards

Vinit