Cisco Systems 8861 Manual De Usuario
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 Cisco IP
b) Assign static IP values to the phone. Use the same default router setting that other functioning Cisco IP
Phones use.
c) Assign a TFTP server. Use the same TFTP server that other functioning Cisco IP 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.
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.
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.
Verify that you have assigned the correct MAC address to this Cisco IP Phone.
Step 6
Power cycle the phone.
Related Topics
Basic Reset, on page 263
Determine Phone MAC Address, on page 70
Check DHCP Settings
Procedure
Step 1
On the Cisco IP Phone, press Applications.
Step 2
Select Administrator Settings > Network Setup > IPv4 Setup, 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 no value is found, check your IP routing and VLAN configuration. See the Troubleshooting Switch
Port and Interface Problems document, available at this URL:
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:
• 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.
Step 3
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:
See the Understanding and Troubleshooting DHCP in Catalyst Switch or Enterprise Networks document,
available at this URL:
Cisco IP Phone 8811, 8841, 8851, and 8861 Administration Guide for Cisco Unified Communications Manager 10.5
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Troubleshooting Procedures