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Re: [v6ops] draft-wbeebee-v6ops-ipv6-cpe-router-bis - where to go from here

Fred Baker <fred@cisco.com> Thu, 03 March 2011 06:22 UTC

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From: Fred Baker <fred@cisco.com>
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Date: Wed, 02 Mar 2011 22:19:21 -0800
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To: Thomas Herbst <therbst@silverspringnet.com>
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Subject: Re: [v6ops] draft-wbeebee-v6ops-ipv6-cpe-router-bis - where to go from here
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On Mar 2, 2011, at 11:35 AM, Thomas Herbst wrote:

> Ole preferred OSPF with all area 0.

You might take a look at http://tools.ietf.org/id/draft-dimitri-zospf. You might also take a look at section 2.5 of RFC 1850, which has been superseded by RFC 4750 but describes the default configuration of an OSPF entity as defined in the MIB.

If you do what it says, it configures a valid and interesting OSPF configuration. It also has an interesting sid-effect. On every LAN, a Designated Router is elected. Given that, one can conclude that we know for sure what LANs exist in the house. Add one more bit of information - a bit in a Router LSA or a new LSA - indicating that the router in question is acting as a DHCP server and has been given a prefix by its upstream, and the Designated Router on a LAN can now obtain a subnet prefix for the LAN. As a result, we now have a way to uniquely allocate one more specific prefix per LAN.

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