Cisco 7942G - Unified IP Phone VoIP Поиск и устранение неисправностей и техническое обслуживание - Страница 14

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Check TFTP Settings

Procedure

Step 1

You can determine the IP address of the TFTP server used by the phone by pressing Settings, choosing

Network Configuration > IPv4 and scrolling to the TFTP Server 1 option.

Step 2

If you have assigned a static IP address to the phone, you must manually enter a setting for the TFTP Server

1 option. See

Step 3

If you are using DHCP, the phone obtains the address for the TFTP server from the DHCP server. Check the

IP address configured in Option 150.

Step 4

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 one location to another. See

Procedure

Step 1

On the Cisco Unified IP Phone, choose Settings > Network Configuration > IPv4 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

• IP Address, Subnet Mask, Default Router: If you have assigned a static IP address to the phone, you

Step 2

If you are using DHCP, check the IP addresses distributed by your DHCP server. See the Understanding and

Troubleshooting DHCP in Catalyst Switch or Enterprise Networks document, available at this URL:

http://www.cisco.com/en/US/tech/tk648/tk361/tech_tech_notes_list.html

To verify DNS settings, perform these steps.

Procedure

Step 1

Verify this setting by pressing Settings.

Step 2

Choose Network Configuration and scroll to the DNS Server 1 option.

Step 3

Verify that a CNAME entry exists in the DNS server for the TFTP server and for the

Cisco Unified Communications Manager system.

Troubleshooting and Maintenance

Network Configuration

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. See the Troubleshooting Switch Port and

Interface Problems document, available at this URL :

http://www.cisco.com/en/US/products/hw/switches/ps708/prod_tech_notes_list.html

must manually enter settings for these options. See

Menu.

Network Configuration Menu

Troubleshooting and Maintenance

for instructions.