Configuring Storm Control - Cisco Catalyst 4500 Series Software Configuration Manual

Configuring Storm Control

This chapter describes how to configure port-based traffic control on a switch and consists of these
sections:
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For complete syntax and usage information for the switch commands used in this chapter, see the
Note
Cisco IOS Command Reference Guides for the Catalyst 4500 Series
If a command is not in the Cisco Catalyst 4500 Series Switch Command Reference , you can locate it in
the
About Storm Control
This section contains the following subsections:
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Storm control prevents LAN interfaces from being disrupted by a broadcast storm. A broadcast storm
occurs when broadcast packets flood the subnet, creating excessive traffic and degrading network
performance. Errors in the protocol-stack implementation or in the network configuration can cause a
broadcast storm.
Hardware-Based Storm Control Implementation
Broadcast suppression uses filtering that measures broadcast activity in a subnet over a one-second
interval and compares the measurement with a predefined threshold. If the threshold is reached, further
broadcast activity is suppressed for the duration of the interval. Broadcast suppression is disabled by
default.
About Storm Control, page 65-1
Enabling Broadcast Storm Control, page 65-2
Enabling Multicast Storm Control, page 65-4
Disabling Broadcast Storm Control, page 65-5
Disabling Multicast Storm Control, page 65-6
Displaying Storm Control, page 65-6
Cisco IOS Master Command List, All
Hardware-Based Storm Control Implementation, page 65-1
Software-Based Storm Control Implementation, page 65-2
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
C H A P T E R
Releases.
65
Switch.
65-1