Cisco Systems ATA 188 manual Using a Dhcp Server

Chapter 3 Configuring the Cisco ATA for H.323

Configuring the Cisco ATA Using a TFTP Server

Using a DHCP Server

When using a DHCP server, configuration settings vary depending on whether or not the DHCP server is under the control of the Cisco ATA system administrator or the service provider. The simplest configuration is when the DHCP server is under the control of the Cisco ATA administrator, in which case the DHCP server provides the IP address of the TFTP server. Depending on who controls the DHCP server, follow the applicable configuration procedure:

•Procedure if DHCP Server is Under Control of Cisco ATA Administrator, page 3-13

•Procedure if DHCP Server is not Under Control of Cisco ATA Administrator, page 3-13This section also includes the topic:

•Other DHCP Options You Can Set, page 3-14

Note If no DHCP server is found and the Cisco ATA is programmed to find one, the function button continues to blink.

Procedure if DHCP Server is Under Control of Cisco ATA Administrator

Procedure

Step 1 On the DHCP server, set one of the following two options:

•DHCP option 150 (TFTP server IP address)

•Standard DHCP option 66 (TFTP server name)

If you use DHCP option 150, the Cisco ATA will ignore DHCP option 66. However, if you use DHCP option 66, you must turn off DHCP option 150 or set its value to 0.

Note You can turn off the DHCP option 150 request by using the Cisco ATA OpFlags parameter (see the “OpFlags” section on page 5-33).

Step 2 Make sure to use default values for the following Cisco ATA parameters:

•TftpURL=0

•UseTftp=1

•DHCP=1

This completes the parameter settings and DHCP options you need to configure for this procedure. The Cisco ATA will contact the DHCP server for the IP address of the TFTP server that contains the Cisco ATA configuration file.

Procedure if DHCP Server is not Under Control of Cisco ATA Administrator

This is the procedure to use if the DHCP server is not under the control of the Cisco ATA administrator, which means that the URL of the TFTP server must be manually configured.

Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (H.323)

OL-4008-01 3-13