Re: 6rd sunsetting requirements (version 3)

Sorry. 6204bis is in danger of rat-holing. 6204bis is not multihomed IMHO.

Section 3.2. "The end-user network is a stub network"

Section 2 states "The IPv6 CE router connects the end-user network to a 
[singular] service provider network."

Section 2 also talks about "WAN Interface             an IPv6 CE 
router's attachment to a [singular] link "

Section 3.2 the document also talks about "Provisioning of the 
[singular] WAN interface connecting to the [singular] service provider"

W1 "When the router is attached to the [singular] WAN interface link"

If we're going to get picky about one or more WAN interfaces on the CPE 
router, one or more active links per WAN interface, or one or more 
service provider networks per router, there's plenty more places that 
need to be changed in the text if we want to be entirely consistent.

regards,
RayH

Ole Trøan wrote:
> Mark, et, al,
>
> [...]
>
>> 6RD-4:  A CE router MUST allow 6rd and native IPv6 WAN interfaces to be active alone as well as
simultaneously in order to support coexistence of the two technologies during an incremental migration
period from 6rd to native IPv6.
>>
>> 6RD-5:  Each packet sent on a 6rd or native WAN interface MUST be directed such that its source IP address is
derived from the delegated prefix associated with the upstream network the WAN interface is connected to
[Section 4.3 [RFC3704]].
>>
>> 6RD-6: The CE router MUST allow different as well as identical delegated prefixes to be configured via
each (6rd or native) WAN interface.
>>
>> 6RD-7:  In the event that forwarding rules produce a tie between 6rd and native IPv6, by default, the IPv6
CE Router MUST prefer native IPv6.
>
> I have a few nitpicks with the language above. e.g. the use of "derived". I'll send those privately.
generally I'm OK with the above.
>
> I think adding these paragraphs in the section introduction, would set the context for these
> requirements better:
>
>     A multihomed, multiprefix, IPv6 CE router has multiple WAN interfaces
>     connecting it to one or more Service Providers.  The interfaces may
>     be "real" or "virtual" in the case of tunneling technology such as
>     6rd [RFC5969].  The CE router receives one or more delegated
>     prefixes, each associated with one or more WAN interfaces.
>
>     WAN interfaces are used to send Ingress traffic from the Internet to
>     the End-User, and Egress traffic from the End-User network to the
>     Internet.  Ingress traffic may be received on any active interface at
>     any time.  Egress traffic follows a set of rules within the CE in
>     order to choose the proper WAN interface.  This is important not only
>     in order to choose the best path, but also because the networks that
>     the CE are connected to typically employ source address verification
>     mechanisms.
>
>     Packets arriving at the CE have an IPv6 source address chosen by the
>     host [RFC3484]. The CE router performs source address dependent routing (SAD),
>     such that the egress WAN interface is chosen based on the packet's source
>     address matching the delegated prefix associate with the egress WAN
>     interface.
>
>
> cheers,
> Ole
>
>
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