Avaya 1010, 1020 manual Configuring the Dhcp Option, Example, Escape Replacement Value

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.

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 one or more URLs separated by semicolons that specifies the location of 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.

Example:

If the path is:

http://example/config/fishtank.cfg;ftp://example/other/fishtank.cfg

the system attempts to obtain the configuration file fishtank.cfg from the web server at http://example/config/fishtank.cfg. If the file does not exist at that location, the system attempts to obtain the configuration from the FTP server at ftp://example/other/fishtank.cfg.

Note: If the server requires a username and password to access the file, for example to log into an FTP server, you can include the user name and password in the URL. For example:

ftp://<username>:<password>@example/other/fishtank.cfg

where <username> is the user name and <password> is the password required for the login. The user name and password must not contain a semicolon.

Each URL can also contain the following escapes to make the configuration unique to the system:

Escape	Replacement Value
#M	Replaced with the MAC address using the underscore character to replace the
	colon between bytes. The MAC address resolves to a hexadecimal number with
	lower case letters.

#S

Replaced by the system model; passport.

#I

Replaced by the assigned IP address.

Avaya 1010/1020 User Guide 37