Monitors broadcasts, multicasts, and unicast traffic.
You set thresholds on % (percentage) , PPS (packet per second), BPS (Bits per second)
Actions that can be set are to use STP (Spanning tree protocaol) , slow it down or shutdown the ports by error disabling it (err-disable)
Example of broadcast storm. Notice packet counter increasing and High CPU process.
Ping causing ARP broadcast storm with STP disabled for VLAN 50. Network is saturated and unable to access nodes on the network. Simple ping to a node fails.
In addition to using STP, use storm control to mitigate broadcast storms:
Example of storm-control broadcast minimum limit and maximum limit threshold based on pps.
Packets clipped when maximum is reached and stops clipping when minimum is reached.
Error recovery is used to recover from storm control err-disabling the ports.
No comments:
Post a Comment