[153549] in North American Network Operators' Group
Re: IPv6 /64 links (was Re: ipv6 book recommendations?)
daemon@ATHENA.MIT.EDU (Jean-Francois.TremblayING@videotro)
Fri Jun 8 08:37:57 2012
In-Reply-To: <1339106986.2754.37.camel@karl>
To: kauer@biplane.com.au
From: Jean-Francois.TremblayING@videotron.com
Date: Fri, 8 Jun 2012 08:37:00 -0400
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Karl Auer <kauer@biplane.com.au> a =E9crit sur 07/06/2012 06:09:46 PM :
> On this point I think you are wrong. Except for router advertisements,
> most NDP packets are sent to a solicited node multicast address, and so
> do NOT go to all nodes. It is "the same as broadcast" only in a network
> with switches that do not do MLD snooping.
> > > So I'm not sure how DAD traffic would exceed ARP traffic.
> > I wouldn't expect it to.
> Nor would I - which was the point of my response to an original poster
> who said it might.
Karl,=20
Actually, your analysis seems fair for a normal broadcast network. It's=20
true that DAD is fairly rare. RS and RAs are also part of ND though, but=20
they shouldn't be a large part of the trafic.=20
My comment was probably skewed by my perspective as an MSO. Docsis=20
networks are not really broadcast in nature and the gateway (CMTS) sees
all the ND trafic (ND-proxying), including DAD and RS, which can become=20
a fair amount of trafic in some specific situations.=20
/JF
