Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

MPLS-TE Inter-AS

Hi

just want to know how and what is the best way to route traffic over Inter-AS MPLS-TE using Option B for L2VPN and L3VPN

  • MPLS
5 REPLIES
New Member

MPLS-TE Inter-AS

Hi Marwan,

I think it would be still "autoroute announce" (this is most common) on the headend for the tunnel configured with loose-hops. Only, in this case, the IP Addresses of ASBRs and head-end/tail-end routers would be advertised to other AS.

Regards,

Amit.

New Member

Re: MPLS-TE Inter-AS

Sorry, my bad.....just tested this and it wont work. The reason I see is that the VPNv4 label changes at ASBRs during advertisement, but in data-plane the VPNv4 label is never changed at ASBR due to MPLS-TE transport label on top causing the remote-PE to drop traffic.

I think it would only work if PEs in different AS can exchange VPNv4 routes directly, rather than through ASBR.

Regards,

Amit.

Re: MPLS-TE Inter-AS

but Cisco support MPLS-TE with inter-AS option B and I believe there should be a away to get it working !!

by the way with option B you need to have the tail-end loopback of the other AS PE to establish the TE tunnel with the loose path option, right ?

New Member

MPLS-TE Inter-AS

No need due to loose-path option, but you do need "mpls traffic-eng passive-interface" between ASBRs.

Regards,

Amit.

MPLS-TE Inter-AS

but i think even in the loose path you need to specify the tail-end IP/loopback

in other words the tail-end IP need to be leaked between the two ASes !, right

667
Views
4
Helpful
5
Replies
This widget could not be displayed.