Cisco 7906G Administration Manual page 220

Troubleshooting Cisco Unified IP Phone Security
Table 9-1
Problem
802.1X Not Enabled
Phone cannot obtain a DHCP-as-
signed IP address.
Phone does not register with
Cisco Unified CallManager.
Phone status display as "Configur-
ing IP" or "Registering".
802.1X Authentication Status
displays as "Disabled" (see the
"802.1X Authentication and Status"
section on page
Status menu displays DHCP status
as timing out (see the
section on page
Factory Reset Deleted 802.1X Shared Secret
Phone cannot obtain a DHCP-as-
signed IP address.
Phone does not register with
Cisco Unified CallManager.
Phone status display as "Configur-
ing IP" or "Registering."
Cannot access phone menus to
verify 802.1X status.
Cisco Unified IP Phone 7906G and 7911G Administration Guide for Cisco Unified CallManager 5.1
9-14
Cisco Unified IP Phone Security Troubleshooting (continued)
4-36).
"Status Menu"
7-3).
Chapter 9 Troubleshooting and Maintenance
Possible Cause
These errors typically indicate that
802.1X is not enabled on the phone. To
enable it, see the "Security Configuration
Menu" section on page 4-31
tion on enabling 802.1X on the phone.
These errors typically indicate that the
phone completed a factory reset (see the
"Performing a Factory Reset" section on
page 9-19) while 802.1X was enabled. A
factory reset deletes the shared secret,
which is required for 802.1X authentica-
tion and network access. To resolve this
issue, you have two options:
Temporarily disable 802.1X on the
•
switch
Temporarily move the phone to a
•
network environment that is not
using 802.1X authentication
When the phone starts up normally in one
of these conditions, you can access the
802.1X configuration menus and re-enter
the shared secret.
for informa-
OL-11515-01