Cisco Cisco Aironet 1240 AG Access Point Prospecto
SNR 20 dBm................................. 0 clients
SNR 25 dBm................................. 0 clients
SNR 30 dBm................................. 0 clients
SNR 35 dBm................................. 0 clients
SNR 40 dBm................................. 0 clients
SNR 45 dBm................................. 0 clients
Nearby RADs
RAD 00:0b:85:01:05:08 slot 0................. -46 dBm on 10.1.30.170
RAD 00:0b:85:01:12:65 slot 0................. -24 dBm on 10.1.30.170
Channel Assignment Information
Current Channel Average Energy............... -86 dBm
Previous Channel Average Energy.............. -75 dBm
Channel Change Count......................... 109
Last Channel Change Time..................... Wed Sep 29 12:53e:34 2004
Recommended Best Channel..................... 44
RF Parameter Recommendations
Power Level.................................. 1
RTS/CTS Threshold............................ 2347
Fragmentation Threshold...................... 2346
Antenna Pattern.............................. 0
SNR 25 dBm................................. 0 clients
SNR 30 dBm................................. 0 clients
SNR 35 dBm................................. 0 clients
SNR 40 dBm................................. 0 clients
SNR 45 dBm................................. 0 clients
Nearby RADs
RAD 00:0b:85:01:05:08 slot 0................. -46 dBm on 10.1.30.170
RAD 00:0b:85:01:12:65 slot 0................. -24 dBm on 10.1.30.170
Channel Assignment Information
Current Channel Average Energy............... -86 dBm
Previous Channel Average Energy.............. -75 dBm
Channel Change Count......................... 109
Last Channel Change Time..................... Wed Sep 29 12:53e:34 2004
Recommended Best Channel..................... 44
RF Parameter Recommendations
Power Level.................................. 1
RTS/CTS Threshold............................ 2347
Fragmentation Threshold...................... 2346
Antenna Pattern.............................. 0
APPENDIX A: WLC Release 4.1.185.0 – RRM Enhancements
RF Grouping Algorithm
Neighbor List “pruning timer”
Before the first maintenance release of WLC software 4.1, an AP would keep other APs in its neighbor list for
up to 20 minutes from the last time they were heard. In the event of temporary changes in the RF environment,
there might have been possibilities where a valid neighbor would have pruned out of a given AP’s neighbor list.
In order to provide for such temporary changes to the RF environment, the pruning timer for an AP’s neighbor
list (time since the last neighbor message was heard) has been increased to 60 minutes.
up to 20 minutes from the last time they were heard. In the event of temporary changes in the RF environment,
there might have been possibilities where a valid neighbor would have pruned out of a given AP’s neighbor list.
In order to provide for such temporary changes to the RF environment, the pruning timer for an AP’s neighbor
list (time since the last neighbor message was heard) has been increased to 60 minutes.
Dynamic Channel Assignment Algorithm
Channel Assignment Method
While in the Automatic mode, the default behavior of DCA before 4.1.185.0 was to compute and apply (if
necessary) the channel plans every 10 minutes. Volatile environments might have potentially seen numerous
channel changes during the day. Therefore, the need for advanced, finer control on the frequency of DCA
arose. In 4.1.185.0 and later, users wishing for finer control over the frequency have the ability to configure
these:
necessary) the channel plans every 10 minutes. Volatile environments might have potentially seen numerous
channel changes during the day. Therefore, the need for advanced, finer control on the frequency of DCA
arose. In 4.1.185.0 and later, users wishing for finer control over the frequency have the ability to configure
these:
Anchor Time
—Users wishing to change the 10-minute default will have the option to choose an anchor
time when the group leader will perform in the Start-up mode. The Start-up mode is defined as a period
where the DCA operates every ten minutes for the first ten iterations (100 minutes), with the DCA
sensitivity of 5dB. This is the normal mode of operation before the RRM timers were added in release
4.1. This allows for the network to stabilize initially and quickly. After the Start-up mode ends, the DCA
runs at the user-defined interval. The Start-up mode operation is clearly indicated in the WLC CLI via
the show advanced 802.11[a|b] command:
where the DCA operates every ten minutes for the first ten iterations (100 minutes), with the DCA
sensitivity of 5dB. This is the normal mode of operation before the RRM timers were added in release
4.1. This allows for the network to stabilize initially and quickly. After the Start-up mode ends, the DCA
runs at the user-defined interval. The Start-up mode operation is clearly indicated in the WLC CLI via
the show advanced 802.11[a|b] command:
(Cisco Controller) >show advanced 802.11a channel
Automatic Channel Assignment
Channel Assignment Mode........................ AUTO
Channel Update Interval........................ 600 seconds [startup]
Anchor time (Hour of the day).................. 0
Channel Update Contribution.................... SNI.
Channel Assignment Leader...................... 00:16:46:4b:33:40
Last Run....................................... 203 seconds ago
DCA Senstivity Level: ....................... MEDIUM (5 dB)
Channel Energy Levels
Minimum...................................... unknown
Average...................................... unknown
Maximum...................................... unknown
Channel Dwell Times
Minimum...................................... unknown
Average...................................... unknown
Maximum...................................... unknown
Auto-RF Allowed Channel List................... 36,40,44,48,52,56,60,64,100,
Automatic Channel Assignment
Channel Assignment Mode........................ AUTO
Channel Update Interval........................ 600 seconds [startup]
Anchor time (Hour of the day).................. 0
Channel Update Contribution.................... SNI.
Channel Assignment Leader...................... 00:16:46:4b:33:40
Last Run....................................... 203 seconds ago
DCA Senstivity Level: ....................... MEDIUM (5 dB)
Channel Energy Levels
Minimum...................................... unknown
Average...................................... unknown
Maximum...................................... unknown
Channel Dwell Times
Minimum...................................... unknown
Average...................................... unknown
Maximum...................................... unknown
Auto-RF Allowed Channel List................... 36,40,44,48,52,56,60,64,100,