Cisco ATA 186 Administrator's Manual page 47

Chapter 3 Configuring the Cisco ATA for H.323
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:
•
•
This section also includes the topic:
•
If no DHCP server is found and the Cisco ATA is programmed to find one, the function button
Note
continues to blink.
Procedure if DHCP Server is Under Control of Cisco ATA Administrator
Procedure
On the DHCP server, set one of the following two options:
Step 1
•
•
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
Make sure to use default values for the following Cisco ATA parameters:
Step 2
•
•
•
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.
OL-4008-01
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 3-13
Other DHCP Options You Can Set, page 3-14
DHCP option 150 (TFTP server IP address)
Standard DHCP option 66 (TFTP server name)
You can turn off the DHCP option 150 request by using the Cisco ATA OpFlags parameter (see
the "OpFlags" section on page
TftpURL=0
UseTftp=1
DHCP=1
Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator's Guide (H.323)
Configuring the Cisco ATA Using a TFTP Server
5-33).
3-13