ā03-21-2020 03:01 AM - edited ā07-05-2021 11:52 AM
Hi all,
I just bought four 3800 AP. But they support only 2,4GHz. The speed of clients only 144Mbps.I checked AP and antena, all support both 2,4GHz and 5GHz
How to enable 5GHz ?
3800 model: AIR-AP3802E-S-K9
Four antennas: AIR-ANT2524DW-R
ā03-21-2020 03:21 AM
The only time 2.4 Ghz is disabled automatically is when FRA (flexible radio assignment) is enabled.
ā03-21-2020 04:47 AM
- I think Leo actually means 5Ghz
M.
ā03-21-2020 05:04 AM
ā03-23-2020 01:58 AM
Hi @Leo Laohoo and @marce1000 ,
FRA is disabled as below, but only band 2,4GHz. Please advise. Thanks
(Cisco Controller) >show advanced fra
FRA State........................................ Disabled
FRA Operation State.............................. N/A
FRA Sensitivity.................................. low (100%)
FRA Interval..................................... 1 Hour(s)
Last Run....................................... 21 seconds ago
Last Run Time.................................. 0 seconds
Service Priority................................. Coverage
AP Name MAC Address Slot Current Band COF % Sensor % Suggested Mode
-------------------------------- ----------------- ---- -------------- ---------- ---------- -------------------------
VNSGNB09AP 5c:5a:c7:13:ba:00 0 2.4GHz None None (Static)
COF : Coverage Overlap Factor
[] : COF when radio was in 2.4GHz Band
ā03-23-2020 02:06 AM
ā03-23-2020 02:16 AM
(Cisco Controller) >show sysinfo
Manufacturer's Name.............................. Cisco Systems Inc.
Product Name..................................... Cisco Controller
Product Version.................................. 8.5.151.0
System Name...................................... me-wlc
System Location..................................
System Contact...................................
System ObjectID.................................. 1.3.6.1.4.1.9.1.2373
IP Address....................................... 140.231.150.45
Last Reset....................................... 2: AP Mode Change
System Up Time................................... 0 days 0 hrs 4 mins 56 secs
System Timezone Location......................... (GMT +7:00) Saigon, Hanoi, Bangkok, Jakatar
System Stats Realtime Interval................... 5
System Stats Normal Interval..................... 180
Configured Country............................... VN - Vietnam
State of 802.11b Network......................... Enabled
State of 802.11a Network......................... Enabled
Number of WLANs.................................. 1
--More-- or (q)uit
Number of Active Clients......................... 46
OUI Classification Failure Count................. 27
Memory Current Usage............................. 65
Memory Average Usage............................. 65
CPU Current Usage................................ 4
CPU Average Usage................................ 12
Flash Type....................................... Compact Flash Card
Flash Size....................................... 1073741824
Burned-in MAC Address............................ 78:BC:1A:49:6D:00
Maximum number of APs supported.................. 100
System Nas-Id....................................
WLC MIC Certificate Types........................ SHA1/SHA2
ā03-23-2020 02:38 AM - edited ā03-23-2020 02:42 AM
Should I enable 802.11g for 5GHz using ?
(Cisco Controller) >config 802.11b 11gSupport enable
Changing the 11gSupport will cause all the APs to reboot when you enable 802.11b network.
Are you sure you want to continue? (y/n)
Or : enable 802.11ac, I just noticed that 3700s use 802.11ac for 5GHz connection.
(Cisco Controller) >config 802.11a 11acSupport enable
Unable to modify while 802.11a network is operational.
ā03-23-2020 03:27 AM - edited ā03-23-2020 03:30 AM
Post the complete output to the follwoing commands:
sh advanced 802.11a txpower sh advanced 802.11a channel
Are the SSID configured for 2.4 Ghz only or all radios?
ā03-23-2020 06:03 AM
(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
WLAN Aware TPC................................. Disabled
Min Transmit Power............................. -10 dBm
Max Transmit Power............................. 30 dBm
Update Contribution
Noise........................................ Enable
Interference................................. Enable
Load......................................... Disable
Device Aware................................. Disable
Transmit Power Assignment Leader............... me-wlc (140.231.150.45) (::)
Last Run....................................... 187 seconds ago
Last Run Time.................................. 0 seconds
TPC Mode....................................... Version 1 Channel Aware NO
AP Name Channel TxPower Allowed Power Levels
--More-- or (q)uit
-------------------------------- ---------- ------------- ------------------------
VNSGNB04AP *100 *1/6 (17 dBm) [17/14/11/8/5/2/2/2]
VNSGNB09AP 36* *1/6 (16 dBm) [16/13/10/7/4/2/0/0]
VNSGNB03AP (64,60,52,56)* *1/6 (17 dBm) [17/14/11/8/5/2/2/2]
VNSGNB07AP *100 *1/6 (17 dBm) [17/14/11/8/5/2/2/2]
VNSGNB06AP *36 *1/6 (17 dBm) [17/14/11/8/5/2/2/2]
(Cisco Controller) >show advanced 802.11a channel
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............... Enabled
CleanAir Event-driven RRM sensitivity.......... Medium
CleanAir Event-driven RRM Rogue Option......... Disabled
Channel Assignment Leader...................... me-wlc (140.231.150.45) (::)
Last Run....................................... 261 seconds ago
Last Run Time.................................. 0 seconds
DCA Sensitivity Level.......................... MEDIUM (15 dB)
DCA 802.11n/ac Channel Width................... BEST
DBS Max Channel Width.......................... 80 MHz
DCA Minimum Energy Limit....................... -95 dBm
Channel Energy Levels
Minimum...................................... -71 dBm
--More-- or (q)uit
Average...................................... -71 dBm
Maximum...................................... -71 dBm
Channel Dwell Times
Minimum...................................... 0 days, 03 h 49 m 44 s
Average...................................... 0 days, 03 h 49 m 51 s
Maximum...................................... 0 days, 03 h 50 m 07 s
802.11a 5 GHz Auto-RF Channel List
Allowed Channel List......................... 36,40,44,48,52,56,60,64,100,
104,108,112,116,120,124,128,
132,136,140,149,153,157,161
Unused Channel List.......................... 165
DCA Outdoor AP option.......................... Disabled
ā03-23-2020 02:00 PM - edited ā03-23-2020 02:02 PM
VNSGNB04AP *100 *1/6 (17 dBm) [17/14/11/8/5/2/2/2] VNSGNB09AP 36* *1/6 (16 dBm) [16/13/10/7/4/2/0/0] VNSGNB03AP (64,60,52,56)* *1/6 (17 dBm) [17/14/11/8/5/2/2/2] VNSGNB07AP *100 *1/6 (17 dBm) [17/14/11/8/5/2/2/2] VNSGNB06AP *36 *1/6 (17 dBm) [17/14/11/8/5/2/2/2]
Allowed Channel List......................... 36,40,44,48,52,56,60,64,100,104,108,112,116,120,124,128,132,136,140,149,153,157,161
ā03-23-2020 06:20 PM
Hi @Leo Laohoo ,
Only VNSGNB09AP is 3800 which 5GHz doesn't work. Others are 3700s which work good for 5GHz.
I am new to AP, and actually don't know about UNII-2E, googling now.
ā03-23-2020 06:39 PM
@QuangTran99 wrote:
Only VNSGNB09AP is 3800 which 5GHz doesn't work.
According to the output provided, the AP VNSGNB09AP is operating on Channel 36 and a radio power of 16 dBm.
@QuangTran99 wrote:
No 5GHz clients for AP 3800
So what actually is the problem? No 5.0 Ghz clients or no 5.0 Ghz radio?
ā03-23-2020 07:10 PM
3800 is serving only 2,4GHz with speed 144Mbps and no 5GHz clients
ā03-25-2020 10:03 PM
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