Subject: [Idr] [idr] draft-ietf-idr-ls-distribution

From: Veerendranatha Reddy Vallem <[email-masked]>
Date: Wed, 16 Dec 2015 02:45:18 +0000

Hi,
Can you please help me understanding processing of BGP-LS messages by transit nodes.
Once BGP speaker receives the Update message with BGP Link state (it may be intermediate/transit node),
Whether BGP speaker need to validate each  sub TLVs present in LS NLRI and Attributes before sending the update to neighbor peers, even the speaker is not using that data for processing?

Example Topology:

                                                                                                        Controller
                                AS1                                          AS2                        |
BGP speaker1--------------BGP speaker 2--------------------------BGP speaker 3

Now BGP speaker will send update information to BGP speaker 2, intern forward the Update to BGP speaker 3, BGP speaker will send that information to controller.
Whether SGP speaker2, and BGP speaker 3 need to validate the Sub TLVs present in LS-MPNLRI and LS-Attributes (even they will not process the data, the data is opaque for those ), before sending update to its peer
or Only controller is enough to validate the data, since controller is the consumer for the data present in LS information.

Regards,
Veerendraanath

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