How to define Relay Agent Vendor Specific suboption in ISCdhcpd.conf

David W. Hankins dhankins at
Mon Mar 1 18:15:44 UTC 2010

On Sun, Feb 28, 2010 at 10:18:19PM -0800, Shu Lin wrote:
> - option: Relay Agent (82)
> -- vendor specific suboption (9)
> --- WiMAX vendor specific suboption (24757)
> ---- WiMAX HA IP suboption (2)
> You see the HA IP is already 4th level down into option. Is it possible
> to define it in dhcpd.conf?

We don't currently have official support for the vendor-specific relay
agent sub-option.  For now you could either configure sub-option 9
specifically as a string of octets in hex;

# Scope globally:
    option agent.vendor-specific code 9 = string;

# Scope client-locally assuming option 2's contents are '';
    option agent.vendor-specific 00:00:60:b5:06:02:04:0a:00:00:01;

Or you can navigate the new syntax (in 3.1 if memory serves) to
define option 9 as an encapsulation of an intermediary space, and
then define the enterprise-ID's as encapsulations of a space
specific to each vendor's enterprise #.

It's a lot harder to provide an example in that case.

David W. Hankins	BIND 10 needs more DHCP voices.
Software Engineer		There just aren't enough in our heads.
Internet Systems Consortium, Inc.
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