[c-nsp] I-BGP/IGP question

Waris Sagheer (waris) waris at cisco.com
Sun Sep 21 22:43:07 EDT 2014

That’s correct RFC3107 is probably now 13+ years old. However it has provided the foundation for Unified MPLS resulting in RFC3107 support on access devices. This architecture also pushed the innovation of BGP PIC, Remote LFA, Prefix Independent Convergence and now Segment Routing.

Best Regards,


Waris Sagheer
Technical Marketing Manager
Service Provider Access Group (SPAG)
waris at cisco.com<mailto:waris at cisco.com>
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From: adam vitkovsky <adam.vitkovsky at swan.sk<mailto:adam.vitkovsky at swan.sk>>
Date: Tuesday, September 16, 2014 at 1:01 AM
To: Spyros Kakaroukas <skakaroukas at rolaware.com<mailto:skakaroukas at rolaware.com>>, "mark.tinka at seacom.mu<mailto:mark.tinka at seacom.mu>" <mark.tinka at seacom.mu<mailto:mark.tinka at seacom.mu>>, "cisco-nsp at puck.nether.net<mailto:cisco-nsp at puck.nether.net>" <cisco-nsp at puck.nether.net<mailto:cisco-nsp at puck.nether.net>>
Cc: Wes Smith <f287cd76 at opayq.com<mailto:f287cd76 at opayq.com>>
Subject: Re: [c-nsp] I-BGP/IGP question

Spyros Kakaroukas
Sent: Tuesday, September 16, 2014 8:48 AM
Lately, there have been a few designs that offer extreme scalability, based
on rfc3107 ( bgp-lu ) , but I've yet to hear of anyone actually implementing
them .

Actually rfc3107 is really old and is usually used by folks who use Inter-AS MPLS Opt-C to keep/scale IGP per AS.
Lately it was somehow re-invented (introduced to larger audience) by RAN folks to scale IGPs when MPLS is used all the way throughout the RAN.


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