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Cisco Catalyst 4500 Series Software Configuration Guide

Cisco Catalyst 4500 Series
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CHAPTER
65-1
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
65
Configuring Storm Control
This chapter describes how to configure port-based traffic control on a switch and consists of these
sections:
• 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
Note For complete syntax and usage information for the switch commands used in this chapter, see the
Cisco IOS Command Reference Guides for the Catalyst 4500 Series Switch.
If a command is not in the Cisco Catalyst 4500 Series Switch Command Reference , you can locate it in
the Cisco IOS Master Command List, All Releases.
About Storm Control
This section contains the following subsections:
• Hardware-Based Storm Control Implementation, page 65-1
• Software-Based Storm Control Implementation, page 65-2
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.

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Cisco Catalyst 4500 Series Specifications

General IconGeneral
SeriesCatalyst 4500 Series
CategorySwitch
Layer SupportLayer 2, Layer 3
Form FactorModular chassis
StackableNo
Chassis Slots3, 6, 7, 10
Power Supply OptionsAC, DC
RedundancyPower supply, Supervisor engine
Network ManagementCisco IOS Software CLI, SNMP, Cisco Prime Infrastructure
FeaturesSecurity, QoS
Port DensityUp to 384 ports per chassis
Security Features802.1X, ACLs, DHCP Snooping, Dynamic ARP Inspection, IP Source Guard
Supervisor Engine8-E

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