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Re: END SID Without SRH

"Darren Dukes (ddukes)" <ddukes@cisco.com> Tue, 11 June 2019 16:07 UTC

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From: "Darren Dukes (ddukes)" <ddukes@cisco.com>
To: Ron Bonica <rbonica@juniper.net>
CC: 6man WG <ipv6@ietf.org>
Subject: Re: END SID Without SRH
Thread-Topic: END SID Without SRH
Thread-Index: AdUdO5q1Xl8r4Qz1TcuQQsHzUSUW9ADIUqbwAAS28YA=
Date: Tue, 11 Jun 2019 16:07:24 +0000
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Hi Ron, I’ve been traveling and I’m a bit behind on emails to the list (catching up later today).

Yes you read that section correctly.

Darren

On Jun 11, 2019, at 9:54 AM, Ron Bonica <rbonica@juniper.net<mailto:rbonica@juniper.net>> wrote:

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<mailto: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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