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Channel utilization - show ap auto-rf 802.11b

Question on the command "show ap auto-rf 802.11b <ap_name>". What is the period of time that is measured for:

    Channel Utilization.......................... 64 %

I am seeing high channel util. on certain AP's, but standing directly below the AP w/ spectrum analyzer, I see much lower util.%:metageek-cap.png

Basically, wondering if the measurement is from the exact time I launch the command, or if it's over say a 10 sec. period?

WLCCA shows highest Rx neighbor @ -71

complete output of the command:

(WiSM-slot8-1) >show ap auto-rf 802.11b ap-bhs-400-2

Number Of Slots.................................. 2

AP Name.......................................... ap-bhs-400-2

MAC Address...................................... 50:57:a8:d6:7d:6d

  Slot ID........................................ 0

  Radio Type..................................... RADIO_TYPE_80211b/g

  Sub-band Type.................................. All

  Noise Information

    Noise Profile................................ PASSED

    Channel 1....................................  -88 dBm

    Channel 2....................................  -89 dBm

    Channel 3....................................  -91 dBm

    Channel 4....................................  -94 dBm

    Channel 5....................................  -93 dBm

    Channel 6....................................  -93 dBm

    Channel 7....................................  -90 dBm

    Channel 8....................................  -87 dBm

    Channel 9....................................  -94 dBm

    Channel 10...................................  -92 dBm

    Channel 11...................................  -92 dBm

  Interference Information

    Interference Profile......................... PASSED

    Channel 1.................................... -128 dBm @  0 % busy

    Channel 2.................................... -128 dBm @  0 % busy

    Channel 3.................................... -128 dBm @  0 % busy

    Channel 4.................................... -128 dBm @  0 % busy

    Channel 5.................................... -128 dBm @  0 % busy

    Channel 6.................................... -128 dBm @  0 % busy

    Channel 7.................................... -128 dBm @  0 % busy

    Channel 8.................................... -128 dBm @  0 % busy

    Channel 9.................................... -128 dBm @  0 % busy

    Channel 10................................... -128 dBm @  0 % busy

    Channel 11................................... -128 dBm @  0 % busy

  Load Information

    Load Profile................................. PASSED

    Receive Utilization.......................... 0 %

    Transmit Utilization......................... 1 %

    Channel Utilization.......................... 65 %

    Attached Clients............................. 0 clients

  Coverage Information

    Coverage Profile............................. PASSED

    Failed Clients............................... 0 clients

  Client Signal Strengths

    RSSI -100 dbm................................ 0 clients

    RSSI  -92 dbm................................ 0 clients

    RSSI  -84 dbm................................ 0 clients

    RSSI  -76 dbm................................ 0 clients

    RSSI  -68 dbm................................ 0 clients

    RSSI  -60 dbm................................ 0 clients

    RSSI  -52 dbm................................ 0 clients

  Client Signal To Noise Ratios

    SNR    0 dB.................................. 0 clients

    SNR    5 dB.................................. 0 clients

    SNR   10 dB.................................. 0 clients

    SNR   15 dB.................................. 0 clients

    SNR   20 dB.................................. 0 clients

    SNR   25 dB.................................. 0 clients

    SNR   30 dB.................................. 0 clients

    SNR   35 dB.................................. 0 clients

    SNR   40 dB.................................. 0 clients

    SNR   45 dB.................................. 0 clients

  Nearby APs

    AP 00:0f:90:5e:2a:d0 slot 0..................  -73 dBm on  11 (10.252.1.2)

    AP 00:13:5f:56:e0:90 slot 0..................  -88 dBm on  11 (10.252.1.4)

    AP 00:13:5f:57:00:70 slot 0..................  -79 dBm on   1 (10.252.1.4)

    AP 00:16:9c:91:64:e0 slot 0..................  -43 dBm on  11 (10.252.1.2)

    AP 00:17:0f:db:2e:70 slot 0..................  -87 dBm on   1 (10.252.1.2)

    AP 00:17:df:35:43:90 slot 0..................  -90 dBm on   1 (10.252.1.10)

    AP 00:21:d8:d5:a2:40 slot 0..................  -91 dBm on   1 (10.252.1.12)

    AP 00:21:d8:d5:a8:90 slot 0..................  -91 dBm on   1 (10.252.1.12)

    AP 00:21:d8:d5:a8:c0 slot 0..................  -91 dBm on  11 (10.252.1.12)

    AP 00:21:d8:d5:ac:80 slot 0..................  -92 dBm on   1 (10.252.1.12)

    AP a4:56:30:5d:b0:a0 slot 0..................  -89 dBm on  11 (10.252.1.12)

    AP b4:e9:b0:b3:c8:70 slot 0..................  -91 dBm on  11 (10.252.1.18)

  Radar Information

  Channel Assignment Information

    Current Channel Average Energy...............  -76 dBm

    Previous Channel Average Energy..............  -57 dBm

    Channel Change Count......................... 3

    Last Channel Change Time..................... Wed Jul 17 22:27:37 2013

    Recommended Best Channel..................... 1

  RF Parameter Recommendations

    Power Level.................................. 1

    RTS/CTS Threshold............................ 2347

    Fragmentation Threshold...................... 2346

    Antenna Pattern.............................. 0

  Persistent Interference Devices

  Class Type                 Channel  DC (%%)  RSSI (dBm)  Last Update Time

  -------------------------  -------  ------  ----------  ------------------------

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These are lined down a hallway (about 50' from ea. other). Looks to me like they are set for too high Tx and crowding chan. 1. I'll figure out the reason for that.

show advanced 802.11b txpower:

ap-bhs-400-1                     *1         *1/7 (22 dBm) [22/19/16/13/10/7/4/4]

ap-bhs-400-2                     *1         *1/7 (22 dBm) [22/19/16/13/10/7/4/4]

ap-bhs-400-3                     *11        *1/8 (23 dBm) [23/20/17/14/11/8/5/2]

ap-bhs-400-4                     *1         *1/7 (22 dBm) [22/19/16/13/10/7/4/4]

ap-bhs-400-5                     *11        *7/8 ( 5 dBm) [23/20/17/14/11/8/5/2]

ap-bhs-400-6                     *1         *1/7 (22 dBm) [22/19/16/13/10/7/4/4]

ap-bhs-451-1                     *6         *7/8 ( 5 dBm) [23/20/17/14/11/8/5/2]

1 ACCEPTED SOLUTION

Accepted Solutions
Hall of Fame Super Silver

Channel utilization - show ap auto-rf 802.11b

Take a look at:

show advanced 802.11b monitor

show advanced 802.11a monitor

Thanks,

Scott

Help out other by using the rating system and marking answered questions as "Answered"

-Scott
*** Please rate helpful posts ***
2 REPLIES
Hall of Fame Super Silver

Channel utilization - show ap auto-rf 802.11b

Take a look at:

show advanced 802.11b monitor

show advanced 802.11a monitor

Thanks,

Scott

Help out other by using the rating system and marking answered questions as "Answered"

-Scott
*** Please rate helpful posts ***
New Member

Channel utilization - show ap auto-rf 802.11b

Cool thx. Guessing "Load Interval". Looks like 60 seconds is the answer. Including output here for others...

show advanced 802.11b monitor

Default 802.11b AP monitoring

  802.11b Monitor Mode........................... enable

  802.11b Monitor Channels....................... Country channels

  802.11b RRM Neighbor Discovery Type............ Transparent

  802.11b AP Coverage Interval................... 180 seconds

  802.11b AP Load Interval....................... 60 seconds

  802.11b AP Noise Interval...................... 180 seconds

  802.11b AP Signal Strength Interval............ 60 seconds

  802.11b AP Neighbor Report Interval............ 180 seconds

  802.11b AP Interference Report Interval........ 120 seconds

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