Gentlemen:

I'm writing to you as the authors of RFCs 4861 and 4862. In a past  
meeting, I think the one in March, an issue came up in Savi that has  
now been brought to our attention in a formal manner. The problem is  
that in certain access network technologies, notably DSL and I believe  
Cable Modem, the connectivity between the CPE host or router and the  
ISP's first hop router is siloed - it looks like an Ethernet to the  
host but in fact is separated into separate channels. The effect is  
that while the ISP router can speak to and hear all of the CPEs it is  
connected to, the CPEs cannot hear each other. This has implications  
for Duplicate Address Detection in SLAAC.

We look forward to your advice.

Fred Baker
IPv6 Operations

Begin forwarded message:

> From: Robin Mersh <rmersh@broa...>
> Date: November 6, 2009 1:42:05 AM GMT+08:00
> To: fenner@fenr..., christian.vogt@eric..., fred.baker@cisc...
> , kurtis@kurt..., dromasca@avay..., rbonica@juni..., rdroms@cisc...
> , jari.arkko@piuh..., Mark Townsley <townsley@cisc...>
> Subject: Broadband Forum liaison to IETF on IPv6 security
>
> Dear colleagues,
>
> For your review, please see the liaison from the Broadband Forum  
> attached below.
>
> Best regards,
> Robin Mersh
> COO
> The Broadband Forum
> phone: +1 336 288 8013
> cell: +1 303 596 7448
> email: rmersh@broa...
>
>
>
>