Chapter9 Troubleshooting and Maintenance
Troubleshooting Cisco Unified IP Phone Security
9-14
Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 5.1 (SIP), Cisco Unified IP Phones
OL-11524-01
802.1X Not Enabled
Phone cannot obtain a DHCP-assigned IP
address.
These errors typically indicate that 802.1X
authentication is not enabled on the phone. To enable
it, see the “802.1X Authentication and Status” section
on page 4-42 for information on enabling 802.1X
authentication on the phone.
Phone does not register with
Cisco Unified CallManager.
Phone status display as “Configuring IP” or
“Registering”.
802.1X Authentication Status displays as
“Disabled” (see the “802.1X Authentication
and Status” section on page4-42 for more
details).
Status menu displays DHCP status as timing
out (see the “Status Menu” section on page7-3
for more details).
Factory Reset Deleted 802.1X Shared Secret
Phone cannot obtain a DHCP-assigned IP
address.
These errors typically indicate that the phone has
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 authentication and
network access. To resolve this, you have two
options:
•Temporarily disable 802.1X authentication on
the switch.
•Temporarily move the phone to a network
environment that is not using 802.1X
authentication.
Once the phone starts up normally in one of these
conditions, you can access the 802.1X configuration
menus and re-enter the shared secret (see the “802.1X
Authentication and Status” section on page4-42).
Phone does not register with
Cisco Unified CallManager.
Phone status display as “Configuring IP” or
“Registering”.
Cannot access phone menus to verify 802.1X
status.
Table9-1 Cisco Unified IP Phone Security Troubleshooting (continued)
Problem Possible Cause