On 29 February 2016 at 14:17, <sthaug@nethelp.no> wrote:
A relevant question might be if the Trio hardware can do 1:1 while handling multiple ports of line rate DDoS traffic consisting of small packets with different port numbers (i.e. high pps traffic resulting in basically 1 flow per packet). No, I don't know the answer (but I suspect it might be negative).
I cannot see why not, it's cheap. You're doing 1-2 LPM on the packet, QoS lookup, ACL lookup, incrementing various counters, etc., adding one hash lookup and two counters is not going to be relevant cost to the lookup time. Having many entries in the hash table is an issue, incrementing their counters is not.
Here we're using Trio hardware with 1:100 sampling, and are reasonably happy with the results.
-- ++ytti