[141914] in North American Network Operators' Group
Re: The stupidity of trying to "fix" DHCPv6
daemon@ATHENA.MIT.EDU (Owen DeLong)
Tue Jun 14 04:45:55 2011
From: Owen DeLong <owen@delong.com>
In-Reply-To: <alpine.DEB.2.00.1106141017430.26305@uplift.swm.pp.se>
Date: Tue, 14 Jun 2011 01:41:06 -0700
To: Mikael Abrahamsson <swmike@swm.pp.se>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Jun 14, 2011, at 1:20 AM, Mikael Abrahamsson wrote:
> On Tue, 14 Jun 2011, Owen DeLong wrote:
>=20
>> You would need an AWFUL lot of hosts for this to add up to a few =
100pps (or even 10pps) of multicast traffic.
>=20
> On the AMSIX peering LAN there is more than 100pps of ND traffic (at =
least there was when we checked). Since they do not do IPv6 multicast =
intelligent handling (MLD snooping I guess) certain highend (legacy) =
router platforms run into trouble because all these packets are punted =
to RP.
>=20
> Implementing access list that filtered all multicast traffic the =
linecard didn't actually subscribe to, solved the problem.
ND would be a far more frequent occurrence than DHCP requests.
Also, I tend to doubt that ANYONE would do DHCP on an exchange point =
network, so, it's not exactly
an applicable example environment.
Owen
