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Cisco Unified IP Phone 7931G Administration Guide for Cisco Unified Communications Manager 6.1
OL-14587-01
Chapter 9 Troubleshooting and Maintenance
Resolving Startup Problems
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.
To verify these settings, look at the following options on the Settings >
Network
Configuration menu on the phone. (For information about displaying
this menu, see the
“Displaying a Configuration Menu” section on page 4-3.”
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 Troubleshooting Switch Port
Problems, 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 4-7 for instructions.
If you are using DHCP, check the IP addresses distributed by your DHCP server.
Refer to Understanding and Troubleshooting DHCP in Catalyst Switch or
Enterprise Networks, 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
Unified Communications Manager, you must ensure that you have
specified a DNS server. Verify this setting by looking at the DNS Server 1 option
on the Settings > Network Configuration menu on the phone. (For information
about displaying this menu, see the
“Displaying a Configuration Menu” section
on page 4-3.”) You should also verify that there is a CNAME entry in the DNS
server for the TFTP server and for the Cisco Unified Communications Manager
system.
You must also ensure that DNS is configured to do reverse look-ups.
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