Re: UDP DoS mitigation?

* Rick Ernst:

We've had an increasing rate of DoS attacks that spew tens-of-thousands of small UDP packets to a destination on our network. We are getting roughly 2x our entire normal pps across all providers through one interface, or about 4x normal through the individual interface. The Cisco 7206VXR/NPE-G1 CPU melts (>95% load vs 15% average, 20% normal peak) when this hits.

I'm using CEF and ip-route-cache flow on the outside interface.

Is the UDP stream a single flow, or does it consist of lots of different flows?