Storm Control
A LAN storm about occurs back adverse packets are abounding on the LAN segment, creating accidental and
excessive cartage consistent in arrangement achievement degradation. Several factors can account a storm on a network;
examples accommodate errors in the protocol-stack accomplishing or a artifice that is exploited in a device
configuration.
The Storm Ascendancy affection prevents approved arrangement cartage from actuality disrupted by a broadcast, multicast, or
unicast packet storm on any of the concrete interfaces.
The cartage storm ascendancy (also accepted as a cartage abolishment feature) monitors entering packets over a 1-second
interval and compares it to the configured storm-control abolishment akin by application one of the following
methods to admeasurement activity:
The allotment of absolute accessible bandwidth of the anchorage allocated for the broadcast, multicast, or unicast
traffic
Traffic amount over a 1-second breach in packets per additional at which broadcast, multicast, or unicast
packets are accustomed on an interface
With either method, the anchorage blocks cartage back a beginning is reached, clarification out all consecutive packets. As
the anchorage charcoal in a blocked state, the cartage continues to be alone until the cartage amount drops beneath the
suppression level, at which point the anchorage resumes accustomed cartage forwarding.
To accredit the cartage storm-control feature, use the storm-control {broadcast | multicast | unicast}
command from the all-around agreement mode. By default, storm-control is disabled.
The storm-control activity {shutdown | trap} command is acclimated to specify the activity to be taken back a
storm is detected. By default, the storm cartage is suppressed back no activity is configured.
To verify the storm-control abolishment levels configured on an interface, use the appearance storm-control
[interface] [broadcast | multicast | unicast] command.