Cisco Cisco Aironet 1310 Access Point Bridge 릴리즈 노트

For the most up-to-date, detailed troubleshooting information, refer to the Cisco TAC website at 

. Click Technology Support, choose Wireless 

from the menu on the left, and click Wireless LAN.

This section lists changes, errors, and omissions from user documentation for access points.

This section describes changes to access point and bridge documentation for this release.

Access points with 5-GHz radios configured at the factory for use in North America now comply with 
regulations that require radio devices to use Dynamic Frequency Selection (DFS) to detect radar signals 
and avoid interfering with them. 

By default, the access point automatically uses DFS to set the operating frequency on 5-GHz radios. The 
access point randomly selects a frequency from among these frequencies:

Frequencies 5.150 to 5.250 GHz (also known as the UNII-1 band)

Frequencies 5.250 to 5.350 GHz (also known as the UNII-2 band)

Frequencies 5.470 to 5.725 GHz (also known as the UNII-3 band)

Frequencies 5.725 to 5.825 GHz (also known as the UNII-4 band)

By default, Band 3 (5.470 to 5.725 GHz) is disabled to allow backward compatibility with older clients. 
You must explicitly enable it in the Radio Settings page of the GUI or by using the dfs band block radio 
interface CLI command.

When DFS is enabled, the access point monitors its operating frequency for radar signals. If it detects 
radar signals on the channel, the access point takes these steps:

Blocks new transmissions on the channel.

Flushes the power-save client queues.

Broadcasts an 802.11h channel-switch announcement.

Disassociates remaining client devices.

If participating in WDS, sends a DFS notification to the active WDS device that it is leaving the 
frequency.

Randomly selects a different 5-GHz channel.

Scans the new channel for radar signals for 60 seconds.