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RE: END SID Without SRH

Ron Bonica <rbonica@juniper.net> Tue, 11 June 2019 13:54 UTC

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From: Ron Bonica <rbonica@juniper.net>
To: 6man WG <ipv6@ietf.org>, "Darren Dukes (ddukes)" <ddukes@cisco.com>
Subject: RE: END SID Without SRH
Thread-Topic: END SID Without SRH
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Date: Tue, 11 Jun 2019 13:54:48 +0000
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Hi Darren,

I haven't seen a response to this question. Maybe I wasn't clear.

The packet described below has no extension headers at all. This, of course, means that it doesn't have an SRH.

I look forward to your response.

                                                               Ron




Juniper Internal
From: Ron Bonica
Sent: Friday, June 7, 2019 10:26 AM
To: 6man WG <ipv6@ietf.org>
Subject: END SID Without SRH

Darren,

This isn't a blocker. Just a surprising behavior that never struck me before.

Assume that an SRv6 router receives a packet whose destination address is an END SID. The packet does not contain any extension headers at all.

If the next header after the IPv6 header is IPv4 or IPv6, the router removes the outer header and forwards the payload.

If the next header after the IPv6 header is TCP, the router discards the packet and sends an ICMP Parameter Problem message back to the source.

Am I reading the spec correctly?

                                            Ron



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