[c-nsp] rate limiting multicast

[Mikael Carlander]

Hi.
I'm doing a white-paper on DDoS-attacks against edge-routers and I'm
hoping someone could help me with a Multicast issue.
The SQL-slammer worm knocked out a few routers due to scanning addreses
without discriminating unicast from multicast.
Most ISP's are now rate-limiting Multicast. My question is: When you limit
Multicast, are you limiting CPU or bandwidth? and more importantly, are
you limiting by percentage or a static number?


So grateful for an answer
/Micke


Hälsningar

Mikael Carlander
rip at kth.se