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Configuring Port-Based Traffic Control
This chapter describes how to configure the port-based traffic control features on the switch.
For complete syntax and usage information for the commands used in this chapter, see the command
Note
reference for this release.
This chapter consists of these sections:
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Configuring Storm Control
These sections contain this conceptual and configuration information:
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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 one of the physical interfaces. 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 configurations, or users issuing a denial-of-service attack can cause a storm.
Storm control (or traffic suppression) monitors packets passing from an interface to the switching bus
and determines if the packet is unicast, multicast, or broadcast. The switch counts the number of packets
of a specified type received within the 1-second time interval and compares the measurement with a
predefined suppression-level threshold.
OL-8915-03
Configuring Storm Control, page 23-1
Configuring Protected Ports, page 23-6
Configuring Port Blocking, page 23-8
Configuring Port Security, page 23-9
Displaying Port-Based Traffic Control Settings, page 23-20
Understanding Storm Control, page 23-1
Default Storm Control Configuration, page 23-3
Configuring Storm Control and Threshold Levels, page 23-3
Configuring Small-Frame Arrival Rate, page 23-5
C H A P T E R
Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide
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23-1
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Troubleshooting
