02-12-2009 01:17 AM - edited 07-03-2021 05:09 PM
Hi Team
I have the 802.11nAG with the 3750E and have the right software to enable each port to do 20....the real issue here is that without the 5Ghz antenna everything works fine but as soon as i plug this in it get a power error..Is there a way to deactivate the Ghz antenna and to make sure it doen not draw power soo i can work with the 2.4 alone for now
Thanks and Regards
Tau
02-12-2009 08:15 AM
Does this happen on several APs, or just one?
Try removing the 5GHz radio from the AP, that should work. Otherwise simply disable the radio by going into the Dot11Radio1 interface on the GUI and disabling it. You can also use the terminal to disable it by issuing the "shutdown" command under the Dot11Radio1 interface.
Let me know if that works.
02-12-2009 08:04 PM
On several AP's...Removing it works but the customer will not sign of the project..I just need to make sure it does not draw power ..
Thanks and Regards
Tau Mailula
02-24-2009 03:31 PM
If you set the port to only provide standard PoE at 15.4W and disable the 5GHz radio in the config it should be ok.
02-24-2009 08:58 PM
Removing the module? Why don't you just disable the radios via HTML or CLI?
03-08-2009 11:03 AM
Yes u can.
Another solution is buy one power injector
03-09-2009 06:49 AM
You have to remove one module if you using 802.3af, just disable the radio don't work.
I even open a case with this issue and got this reply from TAC:
"Hi Johan ,
Yes, the customer would need to physically remove the hardware.From lab
check, I have noted that with both radios installed the AP needs
approximately 18.5 watts of power and we get the Error condition even
though the second radio is disabled.
So it seems like:
-A single-radio AP1250 auto-negotiates appropriate level and works
with all Cisco switches capable of providing standard 802.3af -A dual
radio AP 1250 with one radio disabled draws higher power than 802.3af
can deliver."
03-09-2009 10:43 AM
With current software, the AP1252 can power both radios (albeit using only 1 transmitter per radio, and with a reduced max output level), even with 802.3af standard 15.4W power. See http://www.cisco.com/en/US/docs/wireless/controller/release/notes/crn421120.html#wp366903 .
Hth,
Aaron
03-09-2009 04:59 PM
The latest Autonomous IOS does not support the AVR firmware update (to enable 15.4 PoE). The RM's AVR firmware will be updated when using a LWAPP (RCV) image.
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