Re: [v6ops] [Last-Call] Tsvart last call review of draft-ietf-v6ops-ipv6-ehs-packet-drops-05

Fred Baker <fredbaker.ietf@gmail.com> Tue, 09 March 2021 13:07 UTC

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From: Fred Baker <fredbaker.ietf@gmail.com>
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Date: Tue, 9 Mar 2021 05:07:49 -0800
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Cc: Fernando Gont <fgont@si6networks.com>, Mark Smith <markzzzsmith@gmail.com>, Gorry Fairhurst <gorry@erg.abdn.ac.uk>, IPv6 Operations <v6ops@ietf.org>, draft-ietf-v6ops-ipv6-ehs-packet-drops.all@ietf.org, last-call@ietf.org, tsv-art@ietf.org
To: Tom Herbert <tom@herbertland.com>
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Subject: Re: [v6ops] [Last-Call] Tsvart last call review of draft-ietf-v6ops-ipv6-ehs-packet-drops-05
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> On Feb 24, 2021, at 9:01 AM, Tom Herbert <tom@herbertland.com> wrote:
> 
> The problems have been caused by some
> routers implementations that have assumed unwritten requirements (like
> routers must access transport layer),

For the record, I don't know that this is a "router implementation" issue as much as it is an "operator requirement" interacting with the design of IPv4/IPv6 and UDP/TCP/ICMP. The protocol number, which operators filter on in ACLs, is carried in the transport layer headers.