Subject: [Idr] How is AS path length calculated? Issue#35

From: Mahesh Jethanandani <[email-masked]>
Date: Tue, 10 Dec 2019 15:03:13 -0800

This, and series of follow-up e-mail, one each for issues discussed in IETF 106, will summarize the issues discussed there, w.r.t. to the BGP YANG model for Service Provider Network <https://tools.ietf.org/html/draft-ietf-idr-bgp-model-07>. I will also suggest a solution. Unless an objection is heard, the suggested solution will be deemed appropriate to implement in the YANG model. The issue is also documented here <https://github.com/mjethanandani/ietf-bgp-yang/issues/35>, in case you want to comment it there.

On the question of how is AS path length calculated, we proposed that calculated AS_PATH length for route SHALL follow RFC 4271 rules. It will let the user see the number that serves as input to BGP route selection. 

Unless an objection is received, that is what will be documented in the model.

Thanks.

Mahesh Jethanandani
[email-masked]