Specifications

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Cisco IOS Command Reference for Cisco Aironet Access Points and Bridges

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Chapter 2 Cisco IOS Commands for Access Points and Bridges

dfs band

Use the dfs band configuration interface command to prevent the access point from automatically

selecting specific groups of 5-GHz channels during dynamic frequency selection (DFS). Use the no form

of the command to unblock groups of channels.

[no] dfs band [1] [2] [3] [4] block

Note This command is supported only on 5-GHz radios configured at the factory for use in the

European Union and Signapore.

Syntax Description

Defaults By default, dfs band 3 is blocked.

Command Modes Configuration interface

Command History

Examples This example shows how to prevent the access point from selecting frequencies 5.150 to 5.350 GHz

during DFS:

ap(config-if)# dfs band 1 2 block

This example shows how to unblock frequencies 5.150 to 5.350 for DFS:

ap(config-if)# no dfs band 1 2 block

This example shows how to unblock all frequencies for DFS:

ap(config-if)# no dfs band block

[1] [2] [3] [4] Specifies a group of channels to be blocked from auto-selection during DFS.

• 1—Specifies frequencies 5.150 to 5.250 GHz. This group of frequencies

is also known as the UNII-1 band.

• 2—Specifies frequencies 5.250 to 5.350 GHz. This group of frequencies

is also known as the UNII-2 band.

• 3—Specifies frequencies 5.470 to 5.725 GHz.

• 4—Specifies frequencies 5.725 to 5.825 GHz. This group of frequencies

is also known as the UNII-3 band.

Release Modification

12.3(4)JA This command was introduced.

12.4(3g)JA &

12.3(8)JEB

This command was modified to provide backward compatibility with clients

that do not yet support the new channels in band 3.