HELP WITH OPTION 43 PLEASE!!!!
John Hascall
john at iastate.edu
Tue Jun 5 13:44:01 UTC 2007
> I'm trying to specify dhcp option 43 in order for my access points to
> be able to find in the DHCP server their own ip pools, coz i want DHCP
> to recognize which AP is requesting ip and depend of the AP is the pool
> of ips im goona use. I'm just wondering how I specify this in the
> dhcp.conf file? Im using DHCP 3.03 and Linksys wap54g.
> Any help is appreciated.
The content of option 43 is specific to the end device using it
-- in your case your wap54g's documentation should cover what
goes in option 43. You specify the option itself like any other:
Here is a basic example from my dhcpd.conf file:
# here I give it the very creative name "option-43"
option option-43 code 43 = text;
# then later it gets used:
host somehost.subdomain.iastate.edu {
# ...other stuff...
option option-43 "10.10.195.249,10.10.251.249";
}
As you can see, this device is expecting option 43 to be a text string.
Often, though, option 43 is used to pass a group of options to the
end device and when this is the case they are often encode in a
type-length-data format -- like this for example:
option option-43 06:01:07:08:07:00:de:ad:be:ef:ca:fe;
here there are two type-length-data suboptions in it:
06:01:07 suboption #6, length 1, data 7
08:07:00:de:ad:be:ef:ca:fe suboption #8, length 7, data 00:de:ad:be:ef:ca:fe
sometimes there is a special flag byte (like "ff") to mark the end of the data.
option option-43 06:01:07:08:07:00:de:ad:be:ef:ca:fe:ff;
^^
Hope this is some help.
John
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