In a message written on Sun, Jun 12, 2011 at 01:04:41PM +0200, Iljitsch van 
Beijnum wrote:
> But what's the alternative? Always run DHCPv6 even if there are no router 
> advertisements or router advertisements with O=0, M=0?

Yes.

> Like I said before, that would pollute the network with many multicasts which 
> can seriously degrade wifi performance.

Huh?  This is no worse than IPv4 where a host comes up and sends a
subnet-broadcast to get DHCP.  I have never heard of a network
brought to its knees from these requests.  A single packet each
time a host boots is hardly a high PPS rate.

> And networks without RAs are very common. We call those networks "IPv4-only 
> networks".

No, we call those server networks.  I've seen lots of IPv6 networks with
RA's disabled and all static devices on them.  Sometimes having hosts
dynamically get addresses and default routes is a bad thing.

> And in the current situation DHCPv6 without router advertisements is 
> pointless because you may get an address, but you have no place to send your 
> packets.

Which is what we would like to fix.

-- 
       Leo Bicknell - bickn...@ufp.org - CCIE 3440
        PGP keys at http://www.ufp.org/~bicknell/

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