[c-nsp] IOS-hosted DHCP rate-limiting

[Justin Shore]

I just killed the PVC of a DSL customer that was sending exactly 115 
DHCP DISCOVER messages per second.  That caused a 600% increase on the 
CPU of the NPE-G1 that the PVC terminates on and the DHCP is currently 
being run on.  Are there any DHCP rate-limiting features built into the 
IOS that could be used to throttle either how often the router will 
respond to certain received queries, to queries from a single host, or 
the rate at which queries can be punted to the CPU for processing?

Thanks
  Justin