Determine Dns Or Connectivity Issues; Check Dhcp Settings - Cisco 8832 Administration Manual

Determine DNS or Connectivity Issues

Determine DNS or Connectivity Issues
Procedure
Step 1 Use the Reset Settings menu to reset phone settings to their default values.
Step 2
Modify DHCP and IP settings:
a) Disable DHCP.
b) Assign static IP values to the phone. Use the same default router setting that other functioning phones
use.
c) Assign a TFTP server. Use the same TFTP server that other functioning phones use.
Step 3 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.
Step 4 From Cisco Unified Communications Manager, choose System > Server and verify that reference to the
server is made by the IP address and not by the DNS name.
Step 5
From Cisco Unified Communications Manager, choose Device > Phone. Click Find to search for this phone.
Verify that you have assigned the correct MAC address to this Cisco IP Phone.
Step 6
Power cycle the phone.
Related Topics

Check DHCP Settings

Procedure
Step 1 On the phone, press Settings.
Step 2
Select Admin Settings > Ethernet Setup > IPv4 Setup.
Step 3 Check the DHCP server field.
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 no value is found, check
your IP routing and VLAN configuration. See the Troubleshooting Switch Port and Interface Problems
document, available at this URL:
https://www.cisco.com/en/US/customer/products/hw/switches/ps708/prod_tech_notes_list.html
Step 4
Check the IP Address, Subnet Mask, and Default Router fields.
If you assign a static IP address to the phone, you must manually enter settings for these options.
Step 5
If you are using DHCP, check the IP addresses that your DHCP server distributes.
See the Understanding and Troubleshooting DHCP in Catalyst Switch or Enterprise Networks document,
available at this URL:
Cisco IP Conference Phone 8832 Administration Guide for Cisco Unified Communications Manager
170
Determine the Phone MAC
Restart or Reset the Conference
Address, on page 55
Phone, on page 175
Cisco IP Conference Phone Troubleshooting