Eliminating Dns Or Other Connectivity Errors - Cisco CP-3911 - Unified SIP Phone 3911 VoIP Administration Manual

Chapter 7 Troubleshooting and Maintenance

Eliminating DNS or Other Connectivity Errors

Step 1
Step 2
Step 3
Step 4
Step 5
Cisco Unified SIP Phone 3911 Administration Guide for Cisco Unified Communications Manager
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If the phone continues to reset, follow these steps to eliminate DNS or other
connectivity errors:
Procedure
Reset the phone to factory defaults. See the
on page 7-1 for details.
Modify DHCP and IP settings:
Disable DHCP. See the
a.
for instructions.
Assign static IP values to the phone. See the
b.
section on page 4-3
for other functioning Cisco Unified IP Phones.
c. Assign a TFTP server. See the
page 4-3 for instructions. Use the same TFTP server used for other
functioning Cisco Unified IP Phones.
On the Cisco Unified Communications Manager server, verify that the local host
files have the correct Cisco Unified Communications Manager server name
mapped to the correct IP address.
From Cisco Unified Communications Manager, choose System > Server and
verify that the server is referred to by its IP address and not by its DNS name.
From Cisco Unified Communications Manager, choose Device > Phone > Find
and verify that you have assigned the correct MAC address to this Cisco Unified
IP Phone. For information about determining a MAC address, see the
"Determining the MAC Address for a Cisco Unified IP Phone" section on
page 2-12.
Cisco Unified IP Phone Resets Unexpectedly
"Resolving Startup Problems" section
"Configuring Network Settings" section on page 4-3
for instructions. Use the same default router setting used
"Configuring Network Settings" section on
"Configuring Network Settings"
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