Cisco 7961G Administration Guide

9-5
Cisco IP Phone Administration Guide for Cisco CallManager, Cisco IP Phone 7961G/7961G-GE and 7941G/7941G-GE
OL-6966-01
Chapter 9 Troubleshooting and Maintenance
Resolving Startup Problems
You can also enable the phone to use an alternate TFTP server. Such a setting is
particularly useful if the phone was recently moved from a from one location to
another. See the “Network Configuration Menu” section on page 4-6 for
instructions.
Verifying IP Addressing and Routing
You should verify the IP addressing and routing settings on the phone. If you are
using DHCP, the DHCP server should provide these values. If you have assigned
a static IP address to the phone, you must enter these values manually.
On the Cisco IP Phone, press the Settings button, choose Network
Configuration, and look at the following options:
• DHCP Server—If you have assigned a static IP address to the phone, you do
not need to enter a value for the DHCP Server option. However, if you are
using a DHCP server, this option must have a value. If it does not, check your
IP routing and VLAN configuration. Refer to the Troubleshooting Switch
Port and Interface Problems document, available at this URL:
http://www.cisco.com/warp/customer/473/53.shtml
• IP Address, Subnet Mask, Default Router—If you have assigned a static
IP address to the phone, you must manually enter settings for these options.
See the “Network Configuration Menu” section on page 4-6 for instructions.
If you are using DHCP, check the IP addresses distributed by your DHCP server.
Refer to the Understanding and Troubleshooting DHCP in Catalyst Switch or
Enterprise Networks document, available at this URL:
http://www.cisco.com/warp/customer/473/100.html#41
Verifying DNS Settings
If you are using DNS to refer to the TFTP server or to Cisco CallManager, you
must ensure that you have specified a DNS server. Verify this setting by pressing
the Settings button on the phone, choosing Network Configuration, and
scrolling to the DNS Server 1 option. You should also verify that there is a
CNAME entry in the DNS server for the TFTP server and for the
Cisco CallManager system.
You must also ensure that DNS is configured to do reverse look-ups.
Windows 2000 is configured by default only to perform forward look-ups.

Cisco 7961G Specifications

General

Brand	Cisco
Model	7961G
Category	IP Phone
Language	English