Wireless and RF

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Occasional Contributor II

Cisco Wirless phone

Hi All,

I am using Aruba 5.2 OS with AP s 125's and 61's. the issue is we have got Cisco wireless phones 7921 and 7920 . it connects and keeps disconnecting even the access point is near by at times top of the head . \


I tried with bg only with legacy device support etc , can anyone advice whats wrong ??
Guru Elite

Cisco Wireless Phone

A Few questions:

- What is the Cisco firmware?
- Do you have Advertise 802.11d and 802.11h Capabilities enabled in the radio profile?
- What type of encryption are you using on that SSID?
- What is the DHCP server?
- When you say connecting, how far does it get in the process? Do you mean just get an ip address, or registers with the callmanager than disconnects?


Colin Joseph
Aruba Customer Engineering

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Occasional Contributor II

Re: Cisco Wirless phone

802.11d and 8.211h ,iam not sure if its enabled .how to check the status and if not how to enable it ???

the ssid is open.

We are using aruba controller as dhcp for the Aps and windows based dhcp server for cleints.

It registers with the call manager ,even making calls is fine but suddenly it will show no network, we have couple of them all the same .
Guru Elite

Cisco Wirless Phone

To check to make sure 802.11h is enabled, go to configuration> wireless> AP configuration and edit the ap-group that the phone is in. Expand RF management and click on the 802.11g radio profile (the phone is connecting via 802.11g, right?). Make sure that "Advertise 802.11d and 802.11h Capabilities" has a check mark in the box. Try that and see if it improves.

If that does not make an improvement, you might want to start debugging for that client to see what is going on from an RF perspective:

config t
logging level debugging user-debug


You would then use "show log user-debug " to see what is going on with that client.

If this is a pressing issue, and it seems that it is, you can open a support case so that they can dive right into the details of your issue.


Colin Joseph
Aruba Customer Engineering

Looking for an Answer? Search the Community Knowledge Base Here: Community Knowledge Base