Avaya Video Communications Systems Administrator Guide
8
Configuring Avaya Systems Using DHCP
If an Avaya video communications system obtains its IP address using DHCP (the default), it
can accept an option from the DHCP server that specifies a location and file from which the
system can obtain configuration information. The file can be located on a web server, trivial
file transfer protocol (TFTP) server, or file transfer protocol (FTP) server. Each time the
system boots, it attempts to fetch the configuration file specified by the option. If the
configuration file has changed since the last time it was applied, the system applies the
configuration file before the boot process continues. The following prerequisites must be met
to enable this feature:
•
The
DHCP
preference in
Administrator Preferences : Network : General
on the
Avaya system must be set to
Enabled
.
•
An Avaya system accepts site-specific option 157 for this feature. You must configure
this option on the DHCP server.
Note:
If you configure a system using DHCP option 157 and specify a TFTP server as
the source from which to obtain the configuration file, the system accepts the
download through port 5351. Ensure that firewalls between the system and the
TFTP server are configured to allow the download through this port.
Configuring the DHCP Option
Specific configuration details of DHCP servers for use with this feature vary depending on
the DHCP server used and your environment. The scope of this section is limited to
describing the format of site-specific option 157, which Avaya video communications
systems can accept from a DHCP server to obtain a configuration file.
An Avaya system can accept site-specific option 157 from the DHCP server if you configure
the option as a string with the following format:
“Avaya: server=
<path>
”
where
<path>
is
a one or more URLs separated by a semicolon and that specifies the
location to a configuration file. Supported protocols include TFTP, FTP, and HTTP. If the path
contains more than one URL, the Avaya system tries the URLs in the order listed and uses
the first file that exists.
