Wireless Bridging using Cisco 1242

emiahmad used Ask the Experts™

I have two buildings Building A and B , and need to connect them using wireless AP . I used the following equipments :
 two Cisco (AIR-AP1242AG-E-K9) Access Points and two Cisco (AIR-ANT2506) 2.4 GHz Omni Antenna.

I configured G Radio interface in Building (A) as a Root-Bridge , and the interface gets up and enabled. when I tried to configur G radio interface of Building (B) to be non-Root Bridge , the interface indicated that it's Hardware and software disabled.

how can I get this configuration works , and is the equipments and configuration mode is correct or not .
Please help
Watch Question

Do more with

Expert Office
EXPERT OFFICE® is a registered trademark of EXPERTS EXCHANGE®
If you, please, can add a little more data .... Such as,

- what version of WLC do you use 4400 or 5500 series? Since 1242 AP's are LWAPP native, I assume they are connected on WLC.

- do you use GUI or CGI so we will talk "same" language.

p.s. Just a wild guess... if you use 5500 when creating mash with AP1130 or AP1240 a wplus license must be used on the controller. But for now, please answer the questions above.


Hi dusanm011

I have this Part Number : AIR-AO1242AG-E-K9 , and I am using it without WLC. and I am using GUI to configure such device
I see.

Well, do you plan to connect clients in the other building (B) like a wired clients?

This is what I mean:  [ Building (A)]  Root AP -------bridge--------> WGB AP-> hub -> wired clients  


Yes , both buildings has a wired client , I do not need any wireless clients
Ok then before solution just to focus your attention on few things.

First, in the solution I am suggesting I did not pay attention on setting up the security, I hope you will define it as you like.

Second, you have to use station roles as follows root and wgb . WGB stands for work group bridge. Non-root bridge station mode is used for Mash when WLC is used.

Here are CLI steps order. If you need GUI I'll post it too, just ask.

Issue the infrastructure-client configuration command under the
radio interface on the AP which is playing root AP: infrastructure-client

This command will limit just one bridge AP to connect to your root AP. To clear and explain note that the AP to which a WGB associates can treat the WGB as an infrastructure device or as a simple client device. By default, APs and bridges treat WGBs as client devices. For increased reliability, you can configure APs and bridges to treat WGBs, not as client devices, but as infrastructure devices, like
APs or bridges. When these devices treat a WGB as an infrastructure device, the AP reliably delivers
multicast packets, which include Address Resolution Protocol (ARP) packets, to the WGB.

Root AP configuration:

root#Configure Terminal
root(config)#station-role root
##############This command configures the device in root mode
root(config)#dot11 ssid wgb_ex

root(config-ssid)#authentication open
##############Authentication is set to default open authentication. Set it up as you like but on both sides.
root(config)interface dot11radio 0
!--- Enters the interface mode and enables the SSID on the interface.
root(config-if)ssid wgb_ex

Other AP (in the building B) configuration

wgb#configure terminal
wgb(config)#station role WGB
##############This command configures the device in Workgroup bridge mode
wgb(config)dot11 ssid wgb_ex
wgb(config-ssid)#authentication open
##############Authentication is set to default open  authentication. Set it up as you like but on both sides.
wgb(config-ssid) exit
wgb(config)interface dot11radio 0
wgb(config-if) ssid wgb_ex
wgb(config-if) exit

I hope it will help you.


I discovered that it was a problem in the Cable between the antenna and one of the AP , now I tried to configure AP-1 as a root bridge and AP-2 as non-root bridge , and it works and AP-2 associtaed with AP-1 wthout use of WLC , the final step is to try it in the real location . I will keep you posted about the final result.

thank you
I hope you went just fine with this cable probelm.

Just for further reference to keep in mind root-bridge mode connects to wbg (work group bridge) mode when stand-alone conf is used - it is best practice suggested by Cisco. You can always try different but keep in mind what I wrote about data security, traffic congestion of data and possibility to add more bridges.

These thing, when neglected, may jump at you behind another corner.



The solution can help although I used another way to get the result

Do more with

Expert Office
Submit tech questions to Ask the Experts™ at any time to receive solutions, advice, and new ideas from leading industry professionals.

Start 7-Day Free Trial