Re: RS sending in draft-ietf-v6ops-ipv6-cpe-router-04

[Wojciech Dec <wdec@cisco.com>]

Hi All,

As a follow-up to the discussion, here's some proposed text for the "WAN
side requirements" in Section 4.2:

W-x:    The router MUST orignate RS messages with a source IP address set to
one of the interface's unicast addresses.

Rgds,
Woj.


On 15/04/2010 16:02, "Wojciech Dec" <wdec@cisco.com> wrote:

> Hi,
> 
> Given that RS triggered access appears to be gaining ground (based on the
> latest  draft-krishnan-rs-mark) it would appear that the CPE router draft
> specify a bit more tightly the form of RS messages a CPE sends when connecting
> to a network. 
> RFC4861 section 6.3.7 states:
> " A host sends Router Solicitations to the all-routers multicast
>    address.  The IP source address is set to either one of the
>    interface's unicast addresses or the unspecified address."
> 
> Now, since the source address is very likely to be one of the identifier keys
> for a CPE used for authorization, I would like to propose that an RS sending
> rule be added to the CPE spec which would ensure that the IP source address is
> NEVER the unspecified address, eg:
> 
> The IPv6 CE router MUST use one of its WAN interface unicast addresses when
> sending RS messages.
> 
> Comments?
> 
> -Woj.