IETF Logo Mail Archive

RE: ICMPv6 question

"Templin, Fred L" <Fred.L.Templin@boeing.com> Thu, 31 August 2017 23:51 UTC

Return-Path: <Fred.L.Templin@boeing.com>
X-Original-To: ipv6@ietfa.amsl.com
Delivered-To: ipv6@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id ECE6A13301E for <ipv6@ietfa.amsl.com>; Thu, 31 Aug 2017 16:51:24 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -4.22
X-Spam-Level:
X-Spam-Status: No, score=-4.22 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id v14rLBOflHX4 for <ipv6@ietfa.amsl.com>; Thu, 31 Aug 2017 16:51:23 -0700 (PDT)
Received: from phx-mbsout-02.mbs.boeing.net (phx-mbsout-02.mbs.boeing.net [130.76.184.179]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 0FB39132E55 for <ipv6@ietf.org>; Thu, 31 Aug 2017 16:51:23 -0700 (PDT)
Received: from localhost (localhost [127.0.0.1]) by phx-mbsout-02.mbs.boeing.net (8.14.4/8.14.4/DOWNSTREAM_MBSOUT) with SMTP id v7VNpMlu025615; Thu, 31 Aug 2017 16:51:22 -0700
Received: from XCH15-06-08.nw.nos.boeing.com (xch15-06-08.nw.nos.boeing.com [137.136.238.222]) by phx-mbsout-02.mbs.boeing.net (8.14.4/8.14.4/UPSTREAM_MBSOUT) with ESMTP id v7VNpDwx025204 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=OK) for <ipv6@ietf.org>; Thu, 31 Aug 2017 16:51:13 -0700
Received: from XCH15-06-08.nw.nos.boeing.com (2002:8988:eede::8988:eede) by XCH15-06-08.nw.nos.boeing.com (2002:8988:eede::8988:eede) with Microsoft SMTP Server (TLS) id 15.0.1320.4; Thu, 31 Aug 2017 16:51:13 -0700
Received: from XCH15-06-08.nw.nos.boeing.com ([137.136.238.222]) by XCH15-06-08.nw.nos.boeing.com ([137.136.238.222]) with mapi id 15.00.1320.000; Thu, 31 Aug 2017 16:51:13 -0700
From: "Templin, Fred L" <Fred.L.Templin@boeing.com>
To: "Manfredi, Albert E" <albert.e.manfredi@boeing.com>, 6man WG <ipv6@ietf.org>
Subject: RE: ICMPv6 question
Thread-Topic: ICMPv6 question
Thread-Index: AdMirYG7EwN54XmxT+uCHTYv5GBqHgAAw0HQAACxZAA=
Date: Thu, 31 Aug 2017 23:51:12 +0000
Message-ID: <b8a0cd9adfbb4c2d8c92dddc49b41cf3@XCH15-06-08.nw.nos.boeing.com>
References: <952aab1a2c824a79b98a3f9d2b3a473a@XCH15-06-08.nw.nos.boeing.com> <956f0877cf0f4d2a9e67cbf5b8bdeec6@XCH15-06-11.nw.nos.boeing.com>
In-Reply-To: <956f0877cf0f4d2a9e67cbf5b8bdeec6@XCH15-06-11.nw.nos.boeing.com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-ms-exchange-transport-fromentityheader: Hosted
x-originating-ip: [137.136.248.6]
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-TM-AS-MML: disable
Archived-At: <https://mailarchive.ietf.org/arch/msg/ipv6/cHT5LUznqGI-8J6CM9cJFz7vYcA>
X-BeenThere: ipv6@ietf.org
X-Mailman-Version: 2.1.22
Precedence: list
List-Id: "IPv6 Maintenance Working Group \(6man\)" <ipv6.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/ipv6>, <mailto:ipv6-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/ipv6/>
List-Post: <mailto:ipv6@ietf.org>
List-Help: <mailto:ipv6-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/ipv6>, <mailto:ipv6-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 31 Aug 2017 23:51:25 -0000

HI Bert,

> -----Original Message-----
> From: Manfredi, Albert E
> Sent: Thursday, August 31, 2017 4:36 PM
> To: Templin, Fred L <Fred.L.Templin@boeing.com>; 6man WG <ipv6@ietf.org>
> Subject: RE: ICMPv6 question
> 
> -----Original Message-----
> From: ipv6 [mailto:ipv6-bounces@ietf.org] On Behalf Of Templin, Fred L
> 
> > I have a question. If an IPV6 host with address 2001:db8::f00
> > assigned to an interface receives a packet with destination address
> > 2001:db8::baa over that interface, what should it do? Drop the
> > packet silently, or drop and return an ICMPv6 Destination
> > Unreachable?
> 
> You said host and not router.

Yes - host.

> Assuming that the prefix length is the same for the intended destination of the packet and for the host
> that received the packet, so the packet is not misrouted,

Yes - assume that the prefix 2001:db8::/64 is assigned to the incoming interface.

> then this sounds like what you'd frequently expect to see in older Ethernets,
> either coax Ethernets or half duplex ones that use hubs. But why didn't the Ethernet interface discard the packet? The MAC address
> should not have matched. Was it a ND failure scenario of some kind?

I am assuming that the bogus packet uses a correct MAC destination address
but with an incorrect IPv6 destination address. So, the packet gets handed
up to the IPv6 layer.

> (In general, I don't see why a host should send host unreachable ICMP messages.)

Drop silent would make sense to me, too - but do others think an ICMP
should be generated?

Thanks - Fred

> Bert

v2.23.0 | Report a Bug | By Email