General Troubleshooting Hints - Cisco 7920 Configuring

inter−VLAN routing configured. See the Configuring 802.1Q Trunking on the Catalyst 2924 XL section of
this document.

General Troubleshooting Hints

All devices must have IP connectivity.
The Cisco Aironet 1200 AP must have the IP address of the Cisco Secure ACS configured.
The Cisco Secure ACS must have a Aironet RADIUS Client Entry for the Cisco Aironet 1200 AP,
with the correct IP address.
The Cisco Aironet 1200 AP and the Cisco Secure ACS Aironet RADIUS Client Entry must have the
same RADIUS Shared Secret key.
The user name and password assigned to the Cisco 7920 must be entered into the database that the
Cisco Secure ACS is using.
The Cisco Aironet 1200 AP must be sending and receiving Aironet RADIUS traffic through the
native VLAN of the trunk to which the 1200 AP is connected.
If the Cisco Aironet 1200 AP is configured with VLANs, then the first SSID with which the Cisco
7920 finds a match on the 1200 AP will be used to indicate the VLAN over which the Cisco 7920
should communicate. For instance, if the Cisco 7920 has SSID1=Larry, SSID2=Curly, and
SSID3=Moe, and the Cisco Aironet 1200 AP has SSIDs George on VLAN1, Paul on VLAN2, and
Curly on VLAN3, then the 7920 will connect through VLAN3.
This version of the Cisco 7920 does not support TKIP or MIC. Verify that you have not enabled
either of these features.
Verify that you do not have protocol filters on the Cisco Aironet 1200 AP (or access control lists
[ACLs] in other devices) that are blocking the VoIP signaling traffic or the VoIP voice traffic.
If you are able to place calls to and from the Cisco 7920, and you are experiencing problems with
voice quality, you can determine if the Cisco Aironet 1200 AP is part of the problem. Disconnect its
Ethernet cable and connect a wired IP Phone, such as a Cisco 7960 IP Phone, to the same cable. You
may need to make some modifications on the Catalyst switch port, such as establishing a Voice or
Auxiliary VLAN, to allow the phone to connect properly. If the wired IP Phone also experiences poor
voice quality, then you have VoIP QoS problems in you network that need to be resolved before the
Cisco 7920 can be implemented. If the wired IP Phone does not experience poor voice quality, then
you need to determine if your Cisco Aironet 1200 AP is over−subscribed. Another possible problem
could be RF interference.
Wireless clients that use LEAP and Broadcast Key Rotation, and that are associated to an access point
with VLANs disabled, will lose connectivity with the access point after the second key rotation. The
workaround is to enable VLANs, but this will prevent the use of Proxy Mobile IP on that device. For
more information, refer to Field Notice: LEAP and Broadcast Key Rotation Requires VLAN Config
on AP1200.
Appendix: Configuring the Cisco 7920 with CallManager
The Cisco 7920 files are available at Cisco 7920 Wireless Phone Software Downloads (
.
1. Copy the Cisco 7920 phone image to the TFTP directory on the Cisco CallManager server (for
example, C:\Program Files\Cisco\TFTPPath\).
2. Copy the OS7920.txt file in the same directory. Verify that the contents of this file is a single line
with the file name of the image that the Cisco 7920 will load. For instance:
cmterm_7920.3.2−01−01
3. Add the Cisco 7920 to the Cisco CallManager as a Cisco 7960 IP Phone.
Note: You do not need to specify the image to load.
registered customers only )