Eric and all,
I do not think that this Erratum reflects any real issue. Technical or
editorial, with RFC 4364..
The original text in the RFC, IMHO and FWIW, simply means that the VPN
architecture does not require a dedicated SAFI for routes with the NLRI
comprised by an 8-octet RD followed by an IP prefix but not containing any
labels.
At the same time Section 10 discussed both advertisement of unlabeled IP routes
(in what is known as Inter-AS Option A) and labeled IP routes (in what is known
as Inter-AS Option C).
RFC 4264 (and its predecessor RFC 2547) have been implemented for many years
and widely deployed. There are multiple deployments in the fields where
implementations by different equipment vendors successfully interoperate. AFAIK
during all these years the text in question has never been misinterpreted
causing interoperability issues.
I suggest rejecting the Erratum.
Regards,
Sasha
-Original Message-
From: BESS On Behalf Of Eric Vyncke (evyncke)
Sent: Thursday, August 3, 2023 3:57 PM
To: bess@ietf.org
Subject: [EXTERNAL] [bess] Errata 7180 on RFC 4364 BGP/MPLS IP Virtual Private
Networks (VPNs)
As the L3VPN activities have been transferred to the BESS WG, I would
appreciate feedback from the BESS WG on this errata.
https://clicktime.symantec.com/15siKzyo3CizY1LdsHeqv?h=osVKgJrEFlcW2bC1ypy5YVa-gwTFAL57vb6sQp0DhDE==https://clicktime.symantec.com/15sM1HB9ZpAML5YT8bq46?h=HWRSOoaNbU7qgBs842MyqB5JpChoAwWy9kXqPFoTOO8==https://www.rfc-editor.org/errata_search.php?eid%253D7180
The section 4.3.4 text
" Note that this VPN architecture does not require the capability to
distribute unlabeled VPN-IPv4 addresses."
Is suggested to be replaced by
" Note that this VPN architecture does not require the capability to
distribute unlabeled IPv4 addresses.
With the errata reporter note: From my understanding, VPN-IPv4 addresses are
necessarily labeled, but IPv4 adresses are not indeed. Section 10 seems to
confirm the error by using the correct term: "distribute unlabeled IPv4
addresses to each other."
Thanks in advance for your review,
-éric
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