08-07-2009 02:06 AM
The Loopback 0 IP address will never be summarized in network as loopback summarization breaks LSPs required for MPLS/VPN.
Can someone please explain?
08-07-2009 04:50 AM
Hi,
It's currently a restriction because otherwise the ABR doing the summarization will receive packets with VPN label only due to PHP. Traffic will be lost as the ABR is not aware of the VPN labels.
That's why you need a LSP between the PEs directly.
HTH
Laurent.
08-11-2009 09:50 PM
please read the article given
http://shivlu.blogspot.com/2008/11/why-summarization-is-not-recommended-on.html
Now loopback summarization is possible, for this please read the given post
http://shivlu.blogspot.com/2009/05/loopback-summarization-is-now-possible.html
regards
shivlu jain
08-12-2009 06:46 AM
Hi Shivlu,
There is also another approach via draft-swallow-mpls-aggregate-fec-01
This solution doesn't have the LFIB convergence issue of RFC 5283 but introduce a third label (aggregate label) in the stack.
HTH
Laurent.
06-26-2013 09:10 PM
Is RFC 5283 supported in IOS now? I can see the upstream router receiving label-bindings for more-specific prefixes and the summarized prefix from the downstream router, but it wont assign local labels since the more-specific prefixes are not present in this router's routing-table?
Regards,
Amit.
06-27-2013 11:20 AM
LSP is built between host routes. And for MPLS L3VPN it's built between BGP Router-IDs . Summarization is not recommanded on the core to allow MPLS to form LSPs based on the OSPF link-state database..
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: