[SPAM] How to set Option52

[朱文佳]

Thanks a lot for reply.

I tried to make the contect of ACK longer than 576Bytes,and
the option 52 is acturelly sent automatically by the server .


----- Original Message ----- 
From: "Glenn Satchell" <glenn.satchell at uniq.com.au>
To: "Users of ISC DHCP" <dhcp-users at lists.isc.org>
Sent: Wednesday, March 24, 2010 9:49 PM
Subject: Re: [SPAM] How to set Option52


> On 03/25/10 00:38, Niall O'Reilly wrote:
>> 朱文佳 wrote:
>>> Hello everyone,
>>>
>>> I want to make the dhcpd server to send pakcets with option52.
>>> How can I configure with this?
>>
>> Here's an example from a configuration file here.
>> Option 52 isn't one of the ones we need, so our list
>> doesn't include it.
>>
>> option dhcp-parameter-request-list 1,3,6,15,42,66,150;
>>
>> We use this approach in a 'host { ... }; ' declaration
>> for a very small number of units, matching the list to
>> what we know are the requirements of the unit.
>>
>> Using this option globally will probably over-ride the
>> list specified by the client (if any), and may therefore
>> cause problems. Scripting an action for appending an
>> option to the list presented by the client is something
>> I'm not currently familiar with.
>>
>> Best regards,
>> Niall O'Reilly
>
> Seems to be the night for ugly hacks :0)
>
> 52 decimal is 34 in hex, so
>
> option dhcp-parameter-request-list = concat (option dhcp-parameter-request-list, 34);
>
> option 52 is dhcp-option-overload, which is normally sent automatically by the server when it uses the space available for the 
> fname or sname as extra option space. You shouldn't need to add that yourself, but hte procedure above will work for any option.
>
> -- 
> regards,
> -glenn
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