MP-BGP extended community with OSPF on PE-CE

Hello Guys,

can anyone, please, clarify this for me?

It is related to the MP-BGP extended community "Route-type" used to carry
OSPF routes across the MPLS core.

Route-type as the following format: "S:T:M" --> with "S" = source area, "T"
= type of route, and "M" = metric type.

"T" can take the following value:

2 for intra-area prefixes
3 for inter-area prefixes
5 for external prefixes
7 for NSSA prefixes

My issue is with T = 2; I thought the concept of intra-area is not relevant
here at all as routes going across the super backbone will enter the VRF on
the other side as inter-area anyway.
Why the need of having that option (T = 2) to represent intra area routes in
the community value?

Thanks in advance

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Received on Wed Jan 19 2011 - 13:33:36 ART