RE: Open issues list? [Re: New (-02) version of IPv6 CPE Router draft is available for review]

[Francois-Xavier Le Bail <fx.lebail@yahoo.com>]

--- On Wed, 7/30/08, Hemant Singh (shemant) <shemant@cisco.com> wrote:
> Of course, if there is a bridge to the LAN, then MLD
> snooping is required.
> [...]
> Our new mcast section, that essentially references RFC4605,
> will add such a statement.

Good,

Francois-Xavier

> -----Original Message-----
> From: Francois-Xavier Le Bail [mailto:fx.lebail@yahoo.com] 
> Sent: Wednesday, July 30, 2008 1:28 PM
> To: v6ops@ops.ietf.org; Hemant Singh (shemant); Wes Beebee
> (wbeebee)
> Cc: Brian E Carpenter
> Subject: RE: Open issues list? [Re: New (-02) version of
> IPv6 CPE Router
> draft is available for review]
> 
> What consideration about MLD snooping [RFC4541] on the LAN
> bridge ?
> Without it, a multicast flow will flood all segments on all
> ports.
> Significant bandwidth can be wasted by flooding.
> 
>        +------------------------+
>        | Routing CPE w/ bridge  |
>        | +------+     +------+  |
>  Port1-|-|      |     |      |  |
>        | |Bridge|-----|Router|--|----WAN
>  Port2-|-|      |  LAN|      |  |
>        | +------+     +------+  |
>        +------------------------+
> (David's reference for a routing CPE with internal MAC
> bridge)
> 
> Francois-Xavier