Configuring Radar Detection By Clients; Configuring An Snmp Trap For Radar Detection - Cisco C3201FESMIC-TP= - 3201 Fast EN Switch Mobile Interface Card Expansion Module Software Configuration Manual

Understanding Dynamic Frequency Selection
The WMIC sends an SNMP management trap whenever a channel is switched due either to radar
detection or a return to the prefer channel.

Configuring Radar Detection By Clients

By default, radar detection is disabled in the workgroup bridge and non-root bridge modes (client
modes). However, you can use the radar-detection-enabled command in the workgroup bridge or
non-root bridge mode to enable radar detection in the client mode.
radar-detection-enabled [ dot11h | iapp ]
The default notification method is dot11h (802.11h). However, you can specify Inter-Access Point
Protocol (IAPP) as the notification method. IAPP is also known as IEEE 802.11F.
After a wireless device in client mode associates with a root device, it checks whether radar detection is
enabled and whether the current uplink channel is a DFS channel. If radar detection is enabled and the
current uplink channel is a DFS channel, the wireless device in client mode enables radar detection for
this channel.
When the wireless device detects a radar signal, it immediately notifies the root device, brings down its
interface, and restarts uplink scanning.
When the root device receives radar detection notification from a client, it check the association status:
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Configuring an SNMP Trap for Radar Detection

This command is available on the Cisco 3205 WMIC only.
Note
To configure an SNMP trap for radar detection or to switch to prefer channel notification, use the
snmp-server enable traps command on the master (root) device.
Command
Step 1 configure terminal
Step 2 snmp-server enable traps
{channel-return | channel-switch}
Step 3 end
Radio Channels and Transmit Frequencies
4
If the client is associated and authenticated, the root device immediately responds to the client's
radar detection notification by marking the channel specified by the client as a radar channel and
switches to a new channel following the channel availability check.
In addition, the root device sends an SNMP trap to the network administrator.
If the client is not authenticated or associated to the root device, the root device silently drops the
client's notification.
Purpose
Enters global configuration mode.
Specifies whether to send a notification when the WMIC
returns to the prefer channel or switches to a randomly selected
channel because of radar detection.
Returns to privileged EXEC mode.
Dynamic Frequency Selection
OL-11491-03