RF Channel Assignment Changing from Global to Custom?

[Dave73]

Hi All,

Can anyone advise why APs would be changing from Global to Custom for RF Channel assignment without user intervention?

We have a 5520WLC (8.5.120) with 1572APs running DCA using two channels 5 & 9 (don't ask why). After a period of running some APs revert to Custom and Channel 11.

Thanks,

Dave

[Flavio Miranda]

Hi

 On DCA you should have 1,6 and 11. Never saw this parameter changing with no internation, that's weird.

 Either this is a bug or someone is changing it.

-If I helped you somehow, please, rate it as useful.-

[Scott Fella]

Well you know that channel 5 and 9 overlaps. Anyways, I too have never seen AP’s go from custom to global or vice vera which someone or a management tool making the change.

[Dave73]

Thanks for prompt responses.

We'll do some further internal checking, and then raise a TAC case.

[joand3512004]

This should not be happening, can you share the configuration of DCA to 802.11b? (print)

[Dave73]

Config from the controller:

Leader Automatic Channel Assignment
Channel Assignment Mode........................ AUTO
Channel Update Interval........................ 600 seconds
Anchor time (Hour of the day).................. 0
Update Contribution
Noise........................................ Enable
Interference................................. Enable
Load......................................... Disable
Device Aware................................. Disable
CleanAir Event-driven RRM option............... Disabled
Channel Assignment Leader...................... xxxx (::)
Last Run....................................... 552 seconds ago
Last Run Time.................................. 0 seconds

DCA Sensitivity Level: ...................... MEDIUM (10 dB)
DCA Minimum Energy Limit....................... -95 dBm
Channel Energy Levels
Minimum...................................... -80 dBm
Average...................................... -74 dBm
Maximum...................................... -62 dBm
Channel Dwell Times
Minimum...................................... 0 days, 02 h 34 m 40 s
Average...................................... 5 days, 15 h 29 m 17 s
Maximum...................................... 23 days, 00 h 32 m 15 s
802.11b Auto-RF Allowed Channel List........... 5,9
Auto-RF Unused Channel List.................... 1,2,3,4,6,7,8,10,11
802.11b Radio RF Grouping
RF Group Name.................................. xxxx
RF Protocol Version(MIN)....................... 101(30)
RF Packet Header Version....................... 2
Group Role(Mode)............................... LEADER(AUTO)
Group State.................................... Idle
Group Update Interval.......................... 600 seconds
Group Leader................................... xxxx (::)
Group Member
................................. xxxx
Maximum/Current number of Group Member......... 20/1
Maximum/Current number of AP................... 3000/25
Last Run....................................... 552 seconds ago