Cisco Catalyst 4500 Series - About Storm Control

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CHAPTER

54-1

Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG

OL-25340-01

Configuring Storm Control

This chapter describes how to configure port-based traffic control on the Catalyst 4500 series switch.

This chapter consists of these sections:

• About Storm Control, page 54-1

• Enabling Broadcast Storm Control, page 54-3

• Enabling Multicast Storm Control, page 54-4

• Disabling Broadcast Storm Control, page 54-5

• Disabling Multicast Storm Control, page 54-5

• Displaying Storm Control, page 54-6

Note For complete syntax and usage information for the switch commands used in this chapter, first look at

the Cisco Catalyst 4500 Series Switch Command Reference and related publications at this location:

http://www.cisco.com/en/US/products//hw/switches/ps4324/index.html

If the command is not found in the Catalyst 4500 Series Switch Command Reference, it will be found in

the larger Cisco IOS library. Refer to the Cisco IOS Command Reference and related publications at this

location:

http://www.cisco.com/en/US/products/ps6350/index.html

About Storm Control

This section contains the following subsections:

• Hardware-Based Storm Control Implementation, page 54-2

• Software-Based Storm Control Implementation, page 54-2

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.

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