Cisco 1941W User Manual

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Cisco 3900 Series, Cisco 2900 Series, and Cisco 1900 Series Integrated Services Routers Generation 2 Software Configuration Guide
Chapter Configuring Radio Settings
Configuring Radio Channel Settings
Blocking Channels from DFS Selection
If your regulatory domain limits the channels that you can use in specific locations—for example,
indoors or outdoors—you can block groups of channels to prevent the access point from selecting them
when DFS is enabled. Use this configuration interface command to block groups of channels from DFS
selection:
[no] dfs band [1] [2] [3] [4] block
The 1, 2, 3, and 4 options designate blocks of channels:
• 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.
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
Simulating Radar Detection
You can simulate radar detection on the current channel using the debug dot11 dfs simulate command.
The following example simulates radar on dfs channel 36. Five beacons are sent.
ap>enable
Password:
ap#debug dot11 dot11radio1 dfs simulate 36 5
The following is an example message displayed on the console when radar is detected:
*Mar 6 12:35:09.750: %DOG11-6-DFS_TRIGGERED: DFS: triggered on frequency 5500 MHz

Cisco 1941W Specifications

General

Device Type	Router
Enclosure Type	Desktop
Total LAN Ports	2
Wireless LAN	Yes
Wireless Standard	802.11a/b/g/n
Maximum Wireless Throughput	300 Mbps
Connectivity Technology	Wired, Wireless
Data Link Protocol	Ethernet, Fast Ethernet, Gigabit Ethernet, IEEE 802.11a, IEEE 802.11b, IEEE 802.11g, IEEE 802.11n
Frequency Band	2.4 GHz, 5 GHz
RAM	512 MB
Flash Memory	256 MB
Power Supply	Internal
VPN Support	Yes
Operating System	Cisco IOS
WAN Ports	2
LAN Interfaces	2 x 10/100/1000
Wireless Standards	IEEE 802.11a, IEEE 802.11b, IEEE 802.11g, IEEE 802.11n
Routing Protocol	BGP, EIGRP, OSPF, RIP-1, RIP-2
Remote Management Protocol	SNMP, Telnet
Encryption Algorithm	AES, DES, 3DES
Authentication Method	RADIUS, TACACS+
Interfaces	1 x console
Power	AC 120/230 V (50/60 Hz)
Security Features	Firewall protection, VPN support, Intrusion Prevention System (IPS)