RE: [v6ops] RFC7084

"Hemant Singh (shemant)" <shemant@cisco.com> Wed, 11 December 2013 02:21 UTC

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From: "Hemant Singh (shemant)" <shemant@cisco.com>
To: "Manfredi, Albert E" <albert.e.manfredi@boeing.com>, Ted Lemon <ted.lemon@nominum.com>
Subject: RE: [v6ops] RFC7084
Thread-Topic: [v6ops] RFC7084
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Date: Wed, 11 Dec 2013 02:21:38 +0000
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-----Original Message-----
From: ipv6 [mailto:ipv6-bounces@ietf.org] On Behalf Of Manfredi, Albert E
Sent: Tuesday, December 10, 2013 8:59 PM
To: Ted Lemon
Cc: <ipv6@ietf.org>
Subject: RE: [v6ops] RFC7084

>I may want to prevent any host from sending packets through my edge router, unless the host uses IP addresses I assign. For that, I'd want to set M=1. If I don't care about specific addresses, if all I need is for >clients to configure a routable address, then I set M=0 and O=1, and let the host choose the IID.

>Take the case of a peer-peer network, sans DNS. In that case, I need for hosts to use only a set of prescribed IP addresses, which I distribute via DHCPv6 and the Client Identifier Option. I'd set M=1 for that. The >clients may choose to auto-configure their own routable addresses, and I would feel free to NOT route their packets.

Agree.  Whether hosts on the CPE router LAN acquire address(es) via DHCPv6 or SLAAC, or any other means, the CPE router can support a unicast RPF (uRPF) feature that will drop packets received on a LAN interface if the uRPF check fails. 

Hemant