Very Low RF Signals- WLC-5508.

[taufeeq taufeeq]

Dear Friends,

I have 3 access points placed close to each other expecting appreciable data rates & excellent signals. Unfortunately the signals are very poor.

1. Is this due to channel overlapping ? how do I find it?

2.How to choose non-overlapping channels?

3. How to increase the coverage area?

Please assist.

Thanks in Advance,

Best Regards,

Taufeeq

[Scott Fella]

Post your

show advanced 802.11b txpower

show advanced 802.11a txpower

Thanks,

Scott

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[taufeeq taufeeq]

Hi Mr. Scott,

Thanks for your quick response.

Mentioned below is the requested config.

(Cisco Controller) >show advanced 802.11a txpower

Leader Automatic Transmit Power Assignment

  Transmit Power Assignment Mode................. AUTO

  Transmit Power Update Interval................. 600 seconds

  Transmit Power Threshold....................... -70 dBm

  Transmit Power Neighbor Count.................. 3 APs

  Min Transmit Power............................. -10 dBm

  Max Transmit Power............................. 30 dBm

  Transmit Power Update Contribution............. SNI..

  Transmit Power Assignment Leader............... Cisco_8c:bf:04 (192.168.3.1)

  Last Run....................................... 96 seconds ago

  TPC Mode....................................... Version 1

  TPCv2 Target RSSI.............................. -67 dBm

  TPCv2 VoWLAN Guide RSSI........................ -67.0 dBm

  TPCv2 SOP...................................... -85.0 dBm

  TPCv2 Default Client Ant Gain..................   0.0 dBi

  TPCv2 Path Loss Decay Factor...................   3.6

  TPCv2 Search Intensity......................... 10 Iterations

AP Name                          Channel    TxPower       Allowed Power Levels

--More-- or (q)uit

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

finance                          *48        *4/7 ( 8 dBm) [17/14/11/8/5/2/-1/0]

APccef.4820.6305                 *44        *4/7 ( 8 dBm) [17/14/11/8/5/2/-1/0]

AP4c00.82e9.a00f-RA-13           *64        *5/7 ( 5 dBm) [17/14/11/8/5/2/-1/0]

APccef.4820.6df6                 *64        *5/7 ( 5 dBm) [17/14/11/8/5/2/-1/0]

APccef.4820.6dfe                 *60        *3/7 (11 dBm) [17/14/11/8/5/2/-1/0]

finance2                         *40        *7/7 (-1 dBm) [17/14/11/8/5/2/-1/0]

AP4c00.8224.7913-RA-12           *56        *5/7 ( 5 dBm) [17/14/11/8/5/2/-1/0]

APccef.484c.bcd1                 *64        *2/7 (14 dBm) [17/14/11/8/5/2/-1/0]

APccef.4820.6e38                 *52        *7/7 (-1 dBm) [17/14/11/8/5/2/-1/0]

APCCEF48206E06-1                 *36        *6/7 ( 2 dBm) [17/14/11/8/5/2/-1/0]

APccef.4820.6e21                 *56        *5/7 ( 5 dBm) [17/14/11/8/5/2/-1/0]

APccef.484c.bc4a                 *36        *1/7 (17 dBm) [17/14/11/8/5/2/-1/0]

(Cisco Controller) >show advanced 802.11b txpower

Leader Automatic Transmit Power Assignment

  Transmit Power Assignment Mode................. AUTO

  Transmit Power Update Interval................. 600 seconds

  Transmit Power Threshold....................... -70 dBm

  Transmit Power Neighbor Count.................. 3 APs

  Min Transmit Power............................. -10 dBm

  Max Transmit Power............................. 30 dBm

  Transmit Power Update Contribution............. SNI..

  Transmit Power Assignment Leader............... Cisco_8c:bf:04 (192.168.3.1)

  Last Run....................................... 166 seconds ago

  TPC Mode....................................... Version 1

  TPCv2 Target RSSI.............................. -67 dBm

  TPCv2 VoWLAN Guide RSSI........................ -67.0 dBm

  TPCv2 SOP...................................... -85.0 dBm

  TPCv2 Default Client Ant Gain..................   0.0 dBi

  TPCv2 Path Loss Decay Factor...................   3.6

  TPCv2 Search Intensity......................... 10 Iterations

AP Name                          Channel    TxPower       Allowed Power Levels

--More-- or (q)uit

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

finance                          *11        *7/8 ( 2 dBm) [20/17/14/11/8/5/2/-1]

APccef.4820.6305                 *1         *7/7 (-1 dBm) [17/14/11/8/5/2/-1/0]

AP4c00.82e9.a00f-RA-13           *1         *7/8 ( 2 dBm) [20/17/14/11/8/5/2/-1]

APccef.4820.6df6                 *11        *6/7 ( 2 dBm) [17/14/11/8/5/2/-1/0]

APccef.4820.6dfe                 *11        *6/7 ( 2 dBm) [17/14/11/8/5/2/-1/0]

finance2                         *1         *6/8 ( 5 dBm) [20/17/14/11/8/5/2/-1]

AP4c00.8224.7913-RA-12           *6         *8/8 (-1 dBm) [20/17/14/11/8/5/2/-1]

APccef.484c.bcd1                 *1         *6/7 ( 2 dBm) [17/14/11/8/5/2/-1/0]

APccef.4820.6e38                 *11        *6/7 ( 2 dBm) [17/14/11/8/5/2/-1/0]

APCCEF48206E06-1                 *6         *7/7 (-1 dBm) [17/14/11/8/5/2/-1/0]

APccef.4820.6e21                 *1         *6/7 ( 2 dBm) [17/14/11/8/5/2/-1/0]

APccef.484c.bc4a                 *1         *6/7 ( 2 dBm) [17/14/11/8/5/2/-1/0]

Regards,

Taufeeq

[taufeeq taufeeq]

Hi Scott ,

I am awaiting for your response

Regards,

Taufeeq.

[Scott Fella]

Well as I can tell, you need to set you Min TX power to maybe 8dbm. If you look at you tx power, they are too low especially on the 2.4ghz side. Clients might refuse to associate to an access point with a low tx power level.

So go in the 2.4 and 5 ghz settings in TPC and change the min value to 8. You will need to disable the radio before you can make the change.

Here is a screen shot of where it's located on the 2.4ghz. Do this also on the 5ghz.

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[taufeeq taufeeq]

Hi Scott,

Thanks for your reply!

I will make the change in configuration as suggested.

May I ask you regarding the selection of country. Its US currently instead Saudi Arabia. Will it effect the performance of WLC anyway. Please suggest.

Thanks & Regards,

Taufeeq.

[Scott Fella]

Country code doesn't affect the WLC, it affects the various access points and what country code those access points are manufactured for.  If you have multiple ap's with different country codes, then the WLC will use the channels and power levels that are common to all the country codes defined in the WLC.  So typically it will affect what channels or bands you may use and the max transmit for a given channel.

Thanks,

Scott

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[taufeeq taufeeq]

Thanks again ?

Is there any way to configure WLC to auto choose the non-overlapping channels if not how may I configure non-overlapping channels manually.

Appreciate your response Mr. Scott?

Regards,
Taufeeq ?

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[Leo Laohoo]

Is there any way to configure WLC to auto choose the non-overlapping channels if not how may I configure non-overlapping channels manually.

And why would you want to do that???

[Scott Fella · Accepted solution]

Yeah what Leo said:)

You want to use non overlapping channels as much as possible and RRM does a good job with that.

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[taufeeq taufeeq]

Hi Scott,

Thank you for your Helpful responses as usual ?.

I know that my reply is late ?


Regards,
Taufeeq.

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[Scott Fella]

Did setting the max and min TX power help?

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[taufeeq taufeeq]

Yes Mr. Scott all I wanted was more coverage. Hence by increasing Tx power archived it ?

Regards,
Taufeeq.

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