[Idr] BGP CAR SAFI NLRI format

Srihari Sangli <ssangli@juniper.net> Wed, 14 July 2021 10:34 UTC

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From: Srihari Sangli <ssangli@juniper.net>
To: "bess@ietf.org" <bess@ietf.org>, "idr@ietf.org" <idr@ietf.org>, "draft-dskc-bess-bgp-car@ietf.org" <draft-dskc-bess-bgp-car@ietf.org>
Thread-Topic: BGP CAR SAFI NLRI format
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Date: Wed, 14 Jul 2021 10:34:45 +0000
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Subject: [Idr] BGP CAR SAFI NLRI format
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Hello,

Looking at the archives on this topic, there was a small discussion about the structure of the NLRI as proposed in the BGP CAR draft. The conversation was not conclusive and here’s my thought and a question related to the topic.

While the proposed NLRI format enables NLRI types to be encoded and provides extensibility, it also lists the key and non-key fields. If we go down this path, there may be a tendency to add more fields into the NLRI. While ‘Type-specific Key Fields’ may be justifiable (for obvious reasons of identifying the NLRI), the ‘Type-specific Non-Key Fields’ has a potential to grow.

Also, this is a departure from base BGP specification of NLRI and attributes where attributes carry the common information and non-key fields. Am wondering if the authors have done more investigation on this. Thanks.

srihari…



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