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C H A P T E R
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Cisco Systems Intelligent Gigabit Ethernet Switch Modules for the IBM BladeCenter, Software Configuration Guide
24R9746
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Configuring Port-Based Traffic Control
This chapter describes how to configure the port-based traffic control features on your Cisco Systems
Intelligent Gigabit Ethernet Switch Module.
Intelligent Gigabit Ethernet Switch Module.
Note
For complete syntax and usage information for the commands used in this chapter, see the command
reference for this release.
reference for this release.
This chapter consists of these sections:
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Configuring Storm Control
These sections include storm control configuration information and procedures:
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Understanding Storm Control
Storm control prevents traffic on a LAN from being disrupted by a broadcast, multicast, or unicast storm
on a port. A LAN storm occurs when packets flood the LAN, creating excessive traffic and degrading
network performance. Errors in the protocol-stack implementation, mistakes in network configuration,
or users issuing a denial-of-service attack can cause a storm.
on a port. A LAN storm occurs when packets flood the LAN, creating excessive traffic and degrading
network performance. Errors in the protocol-stack implementation, mistakes in network configuration,
or users issuing a denial-of-service attack can cause a storm.
Storm control is configured for the switch as a whole but operates on a per-port basis. By default, storm
control is disabled.
control is disabled.
Storm control uses rising and falling thresholds to block and then restore the forwarding of broadcast,
unicast, or multicast packets. You can also set the switch to shut down the port when the rising threshold
is reached.
unicast, or multicast packets. You can also set the switch to shut down the port when the rising threshold
is reached.
Storm control uses a bandwidth-based method to measure traffic activity.