RRM feature

[Rosa Ladeira]

I am working on tunneling a wireless network with the following components:

2 AIR-WLC2106-K9
1 AIR-WLC2106-K
11 AIR-LAP1131AG-A-K9
10 AIR-LAP1252AG-T-K9

They are geographically distributed on four floors in the same building.

I have configured RRM feature on both 802.11 a/n and 802.11 b/g/n

After a while on 802.11 b/g/n, all controllers can see each other and one leader had been elected.

On the other hand, on 802.11 a/n there are 2 leaders. One leader has one of the controllers and the other has the other 2 controllers.

Any suggestions ?

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

ssh -l netadm 147.65.14.238

(Cisco Controller)
User: netadm
Password:********
(Cisco Controller) >show advanced 802.11a group

Radio RF Grouping
  802.11a Group Mode............................. AUTO
  802.11a Group Update Interval.................. 600 seconds
  802.11a Group Leader........................... impa-wireless1 (147.65.14.238)
    802.11a Group Member......................... impa-wireless1 (147.65.14.238)
  802.11a Last Run............................... 411 seconds ago

(Cisco Controller) >

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

ssh -l netadm 147.65.14.239

(Cisco Controller)
User: netadm
Password:********
(Cisco Controller) >show advanced 80?
802.11a        802.11b        
(Cisco Controller) >show advanced 802.11a group

Radio RF Grouping
  802.11a Group Mode............................. AUTO
  802.11a Group Update Interval.................. 600 seconds
  802.11a Group Leader........................... impa-wireless4 (147.65.14.241)
    802.11a Group Member......................... impa-wireless2 (147.65.14.239)
    802.11a Group Member......................... impa-wireless4 (147.65.14.241)

(Cisco Controller) >

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

 ssh -l netadm 147.65.14.241

(Cisco Controller)
User: netadm
Password:********
(Cisco Controller) >show advanced 80?
802.11a        802.11b        
(Cisco Controller) >show advanced 802.11a group ?
               
(Cisco Controller) >show advanced 802.11a group

Radio RF Grouping
  802.11a Group Mode............................. AUTO
  802.11a Group Update Interval.................. 600 seconds
  802.11a Group Leader........................... impa-wireless4 (147.65.14.241)
    802.11a Group Member......................... impa-wireless2 (147.65.14.239)
    802.11a Group Member......................... impa-wireless4 (147.65.14.241)
  802.11a Last Run............................... 333 seconds ago

(Cisco Controller) >

+++++++++++++++++++++++++++++++++++++++++  147.65.14.238

show advanced 802.11b group

Radio RF Grouping
  802.11b Group Mode............................. AUTO
  802.11b Group Update Interval.................. 600 seconds
  802.11b Group Leader........................... impa-wireless1 (147.65.14.238)
    802.11b Group Member......................... impa-wireless1 (147.65.14.238)
    802.11b Group Member......................... impa-wireless2 (147.65.14.239)
    802.11b Group Member......................... impa-wireless4 (147.65.14.241)
  802.11b Last Run............................... 114 seconds ago

(Cisco Controller) >

+++++++++++++++++++++++++++++++++++++++++  147.65.14.239

show advanced 802.11b group

Radio RF Grouping
  802.11b Group Mode............................. AUTO
  802.11b Group Update Interval.................. 600 seconds
  802.11b Group Leader........................... impa-wireless1 (147.65.14.238)
    802.11b Group Member......................... impa-wireless1 (147.65.14.238)
    802.11b Group Member......................... impa-wireless2 (147.65.14.239)
    802.11b Group Member......................... impa-wireless4 (147.65.14.241)

+++++++++++++++++++++++++++++++++++++++++  147.65.14.241

show advanced 802.11b group

Radio RF Grouping
  802.11b Group Mode............................. AUTO
  802.11b Group Update Interval.................. 600 seconds
  802.11b Group Leader........................... impa-wireless1 (147.65.14.238)
    802.11b Group Member......................... impa-wireless1 (147.65.14.238)
    802.11b Group Member......................... impa-wireless2 (147.65.14.239)
    802.11b Group Member......................... impa-wireless4 (147.65.14.241)

[Ali Aqrabawi · Accepted solution]

can you confirm that the APs connected to controller impa-wireless1 and APs connected to controller          impa-wireless4  can hear each other with signal >-80 on the A frequencies ,

because on my point of view , the difference of a band and b/g band is the coverage area , as b/g cover a larger area , and this could effect the RRM .

[Rosa Ladeira]

Can you help me find this information about "APs connected to controller impa-wireless1 and APs connected to controller  impa-wireless4  can hear each other with signal >-80 on the A frequencies "?

In fact, a group of APs are very far away from the other.

They are geographicaly on opposite extremes of the building.

Can this be the cause?

Please, take a look at   Channel Energy Levels

 -------------------------------------> impa-wireless1

Automatic Channel Assignment
  Channel Assignment Mode........................ AUTO
  Channel Update Interval........................ 600 seconds
  Anchor time (Hour of the day).................. 0
  Channel Update Contribution.................... SNI..
  CleanAir Event-driven RRM option............... Disabled
  CleanAir Event-driven RRM sensitivity.......... Medium
  Channel Assignment Leader...................... impa-wireless1 (147.65.14.238)
  Last Run....................................... 168 seconds ago
  DCA Sensitivity Level.......................... MEDIUM (15 dB)
  DCA 802.11n Channel Width...................... 20 MHz
  DCA Minimum Energy Limit....................... -86 dBm
  Channel Energy Levels
    Minimum...................................... unknown
    Average...................................... unknown
    Maximum...................................... unknown
  Channel Dwell Times
    Minimum...................................... 2 days, 19 h 55 m 33 s
    Average...................................... 2 days, 20 h 08 m 58 s
    Maximum...................................... 2 days, 20 h 22 m 24 s
  802.11a 5 GHz Auto-RF Channel List

   Allowed Channel List......................... 56,60,149,153,157,161,157,161
    Unused Channel List.......................... 64,100,104,108,112,116,120,
                                                  124,128,132,136,140,165
  802.11a 4.9 GHz Auto-RF Channel List
    Allowed Channel List.........................
    Unused Channel List.......................... 1,2,3,4,5,6,7,8,9,10,11,12,
                                                                    13,14,15,16,17,18,19,20,21,
                                                                    22,23,24,25,26
  DCA Outdoor AP option.......................... Disabled

 -------------------------------------> impa-wireless4

(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.D
  CleanAir Event-driven RRM option............... Disabled
  CleanAir Event-driven RRM sensitivity.......... Medium
  Channel Assignment Leader...................... impa-wireless4 (147.65.14.241)
  Last Run....................................... 494 seconds ago
  DCA Sensitivity Level.......................... STARTUP (5 dB)
  DCA 802.11n Channel Width...................... 20 MHz
  DCA Minimum Energy Limit....................... -95 dBm
  Channel Energy Levels
    Minimum...................................... -86 dBm
    Average...................................... -86 dBm
    Maximum...................................... -86 dBm
  Channel Dwell Times
    Minimum...................................... 2 days, 19 h 40 m 27 s
    Average...................................... 2 days, 20 h 20 m 44 s
    Maximum...................................... 2 days, 20 h 47 m 06 s
  802.11a 5 GHz Auto-RF Channel List
    Allowed Channel List......................... 56,60,149,153,157,161
    Unused Channel List.......................... 64,100,104,108,112,116,120,
                                                                    124,128,132,136,140,165
  802.11a 4.9 GHz Auto-RF Channel List
    Allowed Channel List.........................
    Unused Channel List.......................... 1,2,3,4,5,6,7,8,9,10,11,12,
                                                                    13,14,15,16,17,18,19,20,21,
                                                                     22,23,24,25,26
  DCA Outdoor AP option.......................... Disabled

Can I turn on those parameters in order to see anything ?

RF Event and Performance Logging
  Channel Update Logging......................... Off
  Coverage Profile Logging....................... Off
  Foreign Profile Logging........................ Off
  Load Profile Logging........................... Off
  Noise Profile Logging.......................... Off
  Performance Profile Logging.................... Off
  TxPower Update Logging......................... Off

[Leo Laohoo]

I have no idea what you are trying to do with your APs but some of them will not join your WLC.   Your 1131 have "-A" Regulatory Domain and your 1250 have "-T" Regulatory Domain.  

I believe both Regulatory Domain are conflicting so either one will join the WLC.

[Rosa Ladeira]

Well I really have both AIR-LAP1252AG-T-K9 and AIR-LAP1131AG-A-K9 connected to 2 AIR-WLC2106-K9 and 1 AIR-WLC2112-K9.

It seams they are fine together.

Where can I find some doc about Regulatory Domain?

According to :

http://www.cisco.com/c/en/us/products/collateral/wireless/aironet-1300-series/product_data_sheet0900aecd80537b6a.pdf

-A, -T, -Z and -N are possible Regulatory Domains

[Leo Laohoo · Accepted solution]

Go here.

Only Taiwan and Brazil uses the "-T" Regulatory Domain.  So whether or not you can get your APs to join the WLC and/or both radios to be enabled (with other conflicting Regulatory Domain) is something to be considered.

[Rosa Ladeira]

Considering APs had already joined, what do you suggest to be aware of?

According to http://www.cisco.com/c/en/us/products/collateral/wireless/aironet-1300-series/product_data_sheet0900aecd80537b6a.pdf

802.11abgnac Standalone Access Points    Brazil -T

802.11gn Controller-Based Access Points    Brazil -A

This means that only Brazil -A APs are suposed to join controllers?

[Ali Aqrabawi]

the AP will join the WLC , but the radio will be down, 

[Ali Aqrabawi]

you can confirm this with a site survey ,

[Rosa Ladeira]

I do not have a tool to site survey.

I know Cisco has one.

Can you tell me what is its name ?