Extensions Path

Code

18

Length

Length varies depending on data in value. Minimum length is 1 octet.

Value

ASCII character text.

Description

Specifies a file that can be retrieved using Trivial File Transfer Protocol (TFTP) containing information to be interpreted in the same way as the 64-octet vendor-extension field within a BOOTP response. To allow more than 64 octets of BOOTP vendor extension information, this option can be used. When this option is used, the length of the specified extension path file is not constrained in size and all references in the extensions file to tag 18 (such as instances of the BOOTP Extensions Path field) are ignored.

Structure

Note

For all option types provided in "Extensions Path" that use a list of IP addresses as the valued options data, IP addresses are always used in order of preference by the DHCP client, so that the first address in the list is used first.