Question : Cisco 7941G/7942G/7945G won't boot after a factory reset (DHCP Problems)

Summary: I need help setting up a dhcp server and I need the phone to get an ip address from that dhcp server.

Cisco 7941G/7942G/7945G won't boot after a factory reset... It keeps say "upgrading" and then it restarts over and over again... The problem here is that the phone uses DHCP to get to a TFTP server to get the configuration files. I am new to DHCP, and I need help setting up a dhcp server and forcing to phone to get an ip address from the dhcp server or the phone won't work.


please help.

Answer : Cisco 7941G/7942G/7945G won't boot after a factory reset (DHCP Problems)

  1.

      Make sure these options are on the DHCP server:
          *

            Option 003: Default Gateway
          *

            Option 006: Domain Name System. (DNS) Servers
          *

            Option 015: Domain Name
          *

            Option 066: Boot Server Hostname (TFTP server) (Not Mandatory)
   2.

      Define option 150 if the TFTP server does not have an entry in the DNS server.
   3.

      Add a custom TFTP server. In order to do this, complete these steps:
         1.

            Right-click the DHCP server and select Set Predefined Options.
         2.

            Click Add.
         3.

            Type TFTP Server IP address in the Name field.
         4.

            Choose IP address in the data type list.
         5.

            Type 150 in the Identifier box and click OK.
         6.

            Select Option 150 from the Option Name under the Value section, type the IP address of the TFTP Server in the DHCP Options Default Values window, and click OK.
   4.

      Add Option 150 in Cisco Network Registrar.
         1.

            Select the DHCP cluster.
         2.

            Go to the Advanced tab and click on Custom Options.
         3.

            Click Add.
         4.

            Enter Option number 150 and the Option Data Type of IP address. Click OK.
         5.

            Go to the Policies tab and select your policy.
         6.

            Add the custom Option 150.
         7.

            Enter the TFTP IP address under IP address array.
         8.

            Click on Always send to DHCP clients.
         9.

            Enter Yes to commit the changes to the database.