Re: CPE router draft: Default route and WAN interface provisioning

[Ole Troan <otroan@employees.org>]

Gregory,

[...]

  "When the router is attached to the WAN interface link it must act as
  an IPv6 host for the purposes of stateless or stateful interface
  address assignment ([RFC4862]/[RFC3315]).  The router acts as a
  requesting router for the purposes of DHCP prefix delegation
  ([RFC3633])."

GML> Very minor rework, having JUST brought up a new DSL line last night on my new Juniper SSG-5, and Westell DSL modem:

GML>  "When the router's WAN interface link becomes active, and the provider/customer have agreed upon dynamic interface configuration (as opposed to static configuration of IP parameters) it must momentarily act as an IPv6 host for the purposes of stateless or stateful interface address assignment ([RFC4862]/[RFC3315]). The router acts as a requesting router for the purposes of DHCP prefix delegation ([RFC3633])."

with regards to "momentarily" both SLAAC and DHCP address assignment are not something you can only do when you bring up an interface. you need to in the case of DHCP renew leases and in the case of SLAAC process RAs at least as often as the prefix lifetime. so, even though it would be nice if we could say "momentarily" I do think the interface has to behave with this host/router duality continuously.

cheers,

Ole