On December 21, 2021 at 8:01:21 PM, Gyan Mishra wrote: Gyan:
Hi! Happy New Year! Thank you for the review! ... > Summary: ... The new BGP role capabilities mismatch code 2 subcode 8 > discussed on ML seems to have multiple implementations deployed and one > confined by Cisco. I agree that the authors should request a new subcode > for the role mismatch notification. To catch others up: there is a confirmed case of squatting on the assigned subcode. A consultation on the next steps is open on the idr list and will close tomorrow (Jan/5). https://mailarchive.ietf.org/arch/msg/idr/RBD3Z9YIboudGAIeJLS8L--p4BU/ ... > Nits/editorial comments: > Comment related to Gao-Rexford model. The Gao-Rexford Model only has 3 peer > types North bound upstream Provider, Southbound Customer and lateral same > tier level peer. With the role capabilities, RS and RS-Client is added which > makes it slightly different but almost identical. In describing the role > types would it make sense to have a graphical depiction of Gao-Redford model > with the role capabilities on adjacent peers to help explain the role > relationship for local and remote-as. Just an idea to help explain the role > capabilities. The role definitions are described in this document, not strictly carried over from Gao-Rexford. Nonetheless, a graphical description on the roles defined here may make sense. I'll leave it to the authors to consider (if not too complicated). > In the role correctness section scenario where the peer receives multiple > role capabilities to send role mismatch notification. What if there is a > timing issue and the multiple are received after the BGP open and peer is > established possible sequence of events issue. Is it possible the peer may > not get a mismatch notification if the peer establishes prior to getting a > different capabilities where a mismatch or problem exists that is missed > that could result in a route leak. I am thinking of possibly false positive > or negative or negative during BGP open capabilities exchange All capabilities are signaled in the OPEN, so there's no possibility for receiving a Role Capability afterwards. Alvaro. _______________________________________________ Gen-art mailing list Gen-art@ietf.org https://www.ietf.org/mailman/listinfo/gen-art
