The stupidity of trying to "fix" DHCPv6

Owen DeLong owen at delong.com
Tue Jun 14 03:41:06 CDT 2011


On Jun 14, 2011, at 1:20 AM, Mikael Abrahamsson wrote:

> On Tue, 14 Jun 2011, Owen DeLong wrote:
> 
>> You would need an AWFUL lot of hosts for this to add up to a few 100pps (or even 10pps) of multicast traffic.
> 
> 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.
> 
> 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





More information about the NANOG mailing list