storm troopers...

storm control can be very useful in filtering excessive/unexpected broadcasts, multicasts and unicasts... the higher the level of tolerance set for that traffic will determine the amount allowed before filtering...

apply the filter... (set it low for testing)

dsw1(config)#int f0/5
dsw1(config-if)#storm-control unicast level 0.1
dsw1(config-if)#do sh storm-control uni

Interface  Filter State   Upper        Lower        Current
---------  -------------  -----------  -----------  ----------
Fa0/5      Forwarding        0.10%        0.10%        0.00%
dsw1#

then slam it...

r3#ping 10.1.4.6 size 1500 repeat 100

Type escape sequence to abort.
Sending 100, 1500-byte ICMP Echos to 10.1.4.6, timeout is 2 seconds:
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Success rate is 100 percent (100/100), round-trip min/avg/max = 4/5/16 ms

dsw1#
Mar  5 22:52:00.352: %STORM_CONTROL-3-FILTERED: A Unicast storm detected on Fa0/
5. A packet filter action has been applied on the interface.


storm-control wins...