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From: Lowell Gilbert <freebsd-questions-local@be-well.ilk.org>
To: CeDeROM <cederom@tlen.pl>
Subject: Re: bug in dhclient / dhclient.conf / dhcp-options parser?
References: <CAFYkXjnrr5B=jNR_mtUCbcRcyCMqv96vTC=wxhEmdDU+VYPa_A@mail.gmail.com>
 <CAFYkXj=cDhH79C0b9B7Sq08ZbcQFAfHK+3t9xaqTMuHbF5wdTw@mail.gmail.com>
Date: Tue, 19 Nov 2013 09:49:12 -0500
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CeDeROM <cederom@tlen.pl> writes:

> On Tue, Nov 19, 2013 at 3:09 PM, CeDeROM <cederom@tlen.pl> wrote:
>> I have noticed that other options with names known to
>> dhcp-options and decimal numbers above 100 are sent correctly, so
>> maybe there is an error in the options number parser, or I do
>> something wrong?
>
> I have just tested value 88 (example below 100) and it works
> correctly, so parsing seems okay. Why some option numbers are treated
> in a different way then? :-(

See the manual ("man 5 dhcp-options").

                                                         Options which are not
     listed by name may be defined by the name option-nnn, where nnn is the
     decimal number of the option code. 

You can only specify options by number if the dhcp client doesn't know
the syntax/semantics for that particular option.