RE: draft-wbeebee-ipv6-cpe-router-04 comments

["Hemant Singh (shemant)" <shemant@cisco.com>]

James, 

Please note, we do not recommend that MSR be used to learn routes
between two routers in the home.  If there is more than one router in
the home, then we recommend RIPng be used.  Hopefully the text below is
clear that only when small consumer embedded devices exist in the home
and such devices multi-homed, then MSR use is recommended to be enabled
on the CPE Rtr.  Also

We got convinced because we found a use case where an IPhone is in the
home wireless LAN and also connected to AT&T's cellular network where
the phone downloads its favorite apps from an AT&T server but for other
access the phone may use the home wireless networks provided on a CPE
Router connected to the broadband modem.

Hemant

-----Original Message-----
From: Wes Beebee (wbeebee) 
Sent: Friday, March 27, 2009 3:40 PM
To: james woodyatt; IPv6 Operations
Cc: Hemant Singh (shemant)
Subject: RE: draft-wbeebee-ipv6-cpe-router-04 comments

The new text for MSR's is as follows:

"8.7 Multi-homed Host Support (MEDIUM)
The CPE Router MAY support RFC4191 on its LAN interfaces.  Small
consumer embedded multi-homed hosts in the home may not have
configurable routing tables.  The CPE Router can communicate More
Specific Routes (MSRs) to these hosts to allow them to choose a
preferred router to send traffic to for traffic destined to specific
prefixes configured through manual configuration.  Advertisement of MSRs
through RAs is turned off by default."

- Wes

-----Original Message-----
From: james woodyatt [mailto:jhw@apple.com] 
Sent: Wednesday, March 25, 2009 7:17 PM
To: IPv6 Operations
Cc: Hemant Singh (shemant); Wes Beebee (wbeebee)
Subject: Re: draft-wbeebee-ipv6-cpe-router-04 comments

On Mar 25, 2009, at 16:06, james woodyatt wrote:
>
> Please let me clarify my remarks and narrow my request somewhat, now 
> that I've had a chance to review more of the CPE Router draft.  I am 
> only interested in such RFC 4191 messages when a valid PIO has been 
> received on the WAN link with L=1.  No other cases are interesting.

I take it back.  It's interesting in the other cases as well.  Two CPE
routers attached to the same link will exchange their prefixes with MSR
advertisements regardless of whether the RAs from the service provider
have PIO options in them.  As they should.


--
james woodyatt <jhw@apple.com>
member of technical staff, communications engineering