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Cisco 7971G-GE Manual

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Cisco Unified IP Phone 7970G/7971G-GE for Cisco Unified Communications Manager 6.0
OL-12232-01
Chapter 9 Troubleshooting and Maintenance
Troubleshooting Cisco Unified IP Phone Security
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 4-51.
Phone does not register with
Cisco Unified Communications
Manager
Phone status display as “Configuring
IP” or “Registering”
802.1X Authentication Status displays
as “Disabled”
Status menu displays DHCP status as
timing out
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 9-22) 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 page 4-51).
Phone does not register with
Cisco Unified Communications
Manager
Phone status display as “Configuring
IP” or “Registering”
Cannot access phone menus to verify
802.1X status
Table 9-1 Cisco Unified IP Phone Security Troubleshooting (continued)
Problem Possible Cause
… 251 …


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