[Idr] Fwd: I-D Action: draft-smn-idr-inter-domain-ibgp-00.txt

Hello Krzysiek and other co-authors,

I have read yr draft with interest. Lecture of it triggered number below
comments:

* First fundamental - Concept of IGP domain and BGP domain are completely
separate entities. It has been the case for many years that BGP domain can
span number of IGP domains. In fact large global networks used (maybe still
use) such model.

* Second fundamental - Essentially the entire draft is asking to propagate
IBGP learned routes to other IBGP peers without enabling route reflection
functionality. That is  a severely dangerous suggestion even if (hopefully)
controlled  with a new per session knob.

* Applying policy on IBGP sessions is with few exceptions a bad and
dangerous thing. And likely between domains policy is your friend not an
enemy.

* Suggestion to keep term label-unicast to SAFI 4 only. SAFI 128 does not
carry label unicast routes ... it carries VPN routes with VPN labels. If we
start mixing terms overlay and underlay will be likely mixed.

* I am not sure what exactly is the issue if each domain would actually
have different ASN. We already have knobs not to set next hop self on EBGP
sessions for option C. You are complaining about Local_Pref not being
propagated but you have AIGP attribute or MED instead.  Not sure what is
the issue with RTC ... it works fine between and within domains.

Kind regards,
Robert

---------- Forwarded message ---------
From: <internet-drafts@ietf.org>
Date: Mon, Jan 9, 2023 at 3:26 PM
Subject: I-D Action: draft-smn-idr-inter-domain-ibgp-00.txt
To: <i-d-announce@ietf.org>

A New Internet-Draft is available from the on-line Internet-Drafts
directories.

        Title           : Interconnecting domains with Multiprotocol IBGP
        Authors         : Krzysztof G. Szarkowicz
                          Israel Means
                          Moshiko Nayman
  Filename        : draft-smn-idr-inter-domain-ibgp-00.txt
  Pages           : 13
  Date            : 2023-01-09

Abstract:
   This document relaxes the constraints specified in [RFC4364] and
   [RFC4456] allowing the building of Inter-domain L3VPN architecture
   with Multiprotocol internal BGP.

The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-smn-idr-inter-domain-ibgp/

There is also an HTML version available at:
https://www.ietf.org/archive/id/draft-smn-idr-inter-domain-ibgp-00.html

Internet-Drafts are also available by rsync at rsync.ietf.org:
:internet-drafts

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