Cisco Catalyst 2900 Series XL Especificaciones descargar pdf (Pagina 179)

7-5

Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration Guide

78-6511-06

Chapter 7 Configuring the Switch Ports

Configuring Flooding Controls

Disabling Storm Control

Beginning in privileged EXEC mode, follow these steps to disable broadcast-storm control.

Blocking Flooded Traffic on a Port

By default, the switch floods packets with unknown destination MAC addresses to all ports. Some

configurations do not require flooding. For example, a port that has only manually assigned addresses

has no unknown destinations, and flooding serves no purpose. Therefore, you can disable the flooding

of unicast and multicast packets on a per-port basis. Ordinarily, flooded traffic does not cross VLAN

boundaries, but multi-VLAN ports flood traffic to all VLANs they belong to.

Beginning in privileged EXEC mode, follow these steps to disable the flooding of multicast and unicast

packets to a port:

Command Purpose

Step 1

configure terminal Enter global configuration mode.

Step 2

interface interface Enter interface configuration mode, and enter the port to configure.

Step 3

no port storm-control broadcast Disable port storm control.

Step 4

end Return to privileged EXEC mode.

Step 5

show port storm-control [interface] Verify your entries.

Command Purpose

Step 1

configure terminal Enter global configuration mode.

Step 2

interface interface Enter interface configuration mode, and enter the port to configure.

Step 3

port block multicast Block unknown multicast forwarding to the port.

Step 4

port block unicast Block unknown unicast flooding to the port.

Step 5

end Return to privileged EXEC mode.

Step 6

show port block {multicast |

unicast} interface

Verify your entries, entering the appropriate command once for the

multicast option and once for the unicast option.

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Cisco Catalyst 2900 Series XL Especificaciones Pagina 179