09-17-2013 11:38 PM - edited 07-04-2021 12:52 AM
Hi,
Is it possible to force LAP running with channel 52, 56,60 or 64?
I have configured LAP running channel 36 - 48 statically, using WLC.
But I cannot configure statical 52 channel for my LAP in lab.
Thank you for your advice.
Kawakami in Tokyo
09-18-2013 04:58 AM
Are those channels allowed? This depends on the regulatory domain for the access point. I would verify that first.
Sent from Cisco Technical Support iPhone App
09-18-2013 09:23 AM
That channel is a DFS (Dynamic Frequency Selection) Channel. The DFS Channels are suceptible to radar interferrence and can not be hard set. If the AP hears radar on those channels it has to be able to move away.
http://en.wikipedia.org/wiki/List_of_WLAN_channels#5.C2.A0GHz_.28802.11a.2Fh.2Fj.2Fn.2Fac.29.5B16.5D
HTH,
Steve
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09-18-2013 05:19 PM
Scott,
Thank you for your help. In Japan, channel 52 - 64 is allowed as DFS channel, as Stephen says.
I hear that WLAN AP has to check if there is radar or not before running with DFS channel. Can you configure to run DFS channel statically for Cisco AP?
Regards,
Kawakami
09-18-2013 11:19 PM
I don't really understand your question, but if the channel is allowed by your AP's country code, you can configure it. Can you tell the ap not to use DFS, you can turn off DFS but you can block certain channels.
http://www.cisco.com/en/US/docs/wireless/access_point/12.4_10b_JA/configuration/guide/scg12410b-chap6-radio.html#wp1169248
Sent from Cisco Technical Support iPhone App
09-19-2013 12:02 AM
Scott,
Thank you for the info. Let me confirm. Can I change LAP config throght console?
Regares,
Kawakami
09-18-2013 11:58 PM
what is the AP model?
please attach show version
09-19-2013 12:06 AM
Maldehne,
Thank you for your help. AP is Aironet 3502. I will post show version later.
Regards,
Kawakami
09-19-2013 02:22 AM
Please find attached show version for the AP.
I found "dfs band" command is not allowed in dot11radio interface for the AP.
I wonder if it is because old IOS version or WLC environment. I am confused.
I would appreciate any advice. Thank you.
----------------------------------------
AP-KYO-0002#sh ver
Cisco IOS Software, C3500 Software (AP3G1-K9W8-M), Version 12.4(23c)JA2, RELEASE SOFTWARE (fc3)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2011 by Cisco Systems, Inc.
Compiled Wed 13-Apr-11 12:20 by prod_rel_team
ROM: Bootstrap program is C3500 boot loader
BOOTLDR: C3500 Boot Loader (AP3G1-BOOT-M) Version 12.4(23c)JA, RELEASE SOFTWARE (fc3)
AP-KYO-0002 uptime is 1 hour, 2 minutes
System returned to ROM by reload
System image file is "flash:/ap3g1-k9w8-mx.124-23c.JA2/ap3g1-k9w8-mx.124-23c.JA2"
Last reload reason:
This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.
A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html
If you require further assistance please contact us by sending email to
cisco AIR-CAP3502I-Q-K9 (PowerPC460exr) processor (revision A0) with 81910K/49152K bytes of memory.
Processor board ID FGL1527S1EB
PowerPC460exr CPU at 666Mhz, revision number 0x18A8
Last reset from reload
LWAPP image version 7.0.116.0
1 Gigabit Ethernet interface
2 802.11 Radio(s)
32K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address: 30:E4:DB:45:4B:9A
Part Number : 73-12175-05
PCA Assembly Number : 800-32268-05
PCA Revision Number : A0
PCB Serial Number : FOC15244WDS
Top Assembly Part Number : 800-32891-01
Top Assembly Serial Number : FGL1527S1EB
Top Revision Number : A0
Product/Model Number : AIR-CAP3502I-Q-K9
Configuration register is 0xF
---------------------------------------------------
09-19-2013 03:48 AM
the AP is lightweight mode AP.
so you should do everything from the controller.
You can statically configure a DFS channel. When the AP detects radar on that channel , it will stop servicing clients on that channel and exclude it for 30 minutes. A new channel will be selected from the DCA channel list, even if the channel has been configured statically.
having a limited list of channels from which the new channel will be selected depends on the regulatory domain and the DCA channel list configuration.
So ,the second place to tune the selection is under the DCA channel list configuration.
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09-19-2013 04:11 PM
You can refer to the link which might be helpful-
http://www.cisco.com/en/US/docs/wireless/access_point/channels/lwapp/reference/guide/1300_chp.html
09-19-2013 09:16 PM
Abhishek,
Thank you for your help.
I tried to change channel for the LAP 3502 using WLC, referring to below;
http://www.cisco.com/en/US/docs/wireless/controller/7.0/configuration/guide/c70rrm.html#wp1099018
On GUI, "custom" radio button and following drop-down field shows only 36, 40, 44 and 48 channel.
On CLI, "config 802.11a channel ap (AP name) 52" command returns "unable to set channel."
How do I troublleshoot the reason?
Regards,
Kawakami
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