MPLS VPN HARIPIN CONCEPT

Dear Expert,

I having a doubt on hairpin concept, I have mentioned the configuration
solution by Cisco team. Kindly confirm how the hairpin works ? there is no
route exchange between two vrf , then how it select the path from one vrf
to other vrf. Pls clarify me

vrf definition Test1
 rd 65535:101
 !
 address-family ipv4
 route-target export 65535:101
 route-target import 65535:101
 exit-address-family
!
!
interface TenGigabitEthernet4/3
 description *** Hair-pinning ***
 vrf forwarding Test1
  ip address 10.174.18.194 255.255.255.252
 no ip redirects
 no ip unreachables
 no ip proxy-arp

 rd 65535:102
 !
 address-family ipv4
 route-target export 65535:102
 route-target import 65535:102
 exit-address-family
!
!
interface TenGigabitEthernet4/2
 description *** Hair-pinning ***
 vrf forwarding Test2
 mac-address 503d.e5ff.5201
 ip address 10.174.18.193 255.255.255.252
 no ip redirects
 no ip unreachables
 no ip proxy-arp

With Regards

P.Saravanan

Blogs and organic groups at http://www.ccie.net
Received on Fri Jul 06 2012 - 07:37:21 ART