IP address range

[Glenn Satchell]

>Date: Mon, 27 Jul 2009 21:10:05 +0200 (CEST)
>To: dhcp-users at isc.org, jason.penton at gmail.com
>Subject: Re: IP address range
>From: sthaug at nethelp.no
>X-Spam-Level: *
>X-BeenThere: dhcp-users at lists.isc.org
>
>> Lets say a relay agent is sitting on 10.31.3.10 and we want to issue
>> 172.16.0.0/16 addresses to all clients requesting an IP, how would one
>> set that up. We can assume that the dhcp server is on 10.31.3.1
>> 
>> if i put in the following:
>> subnet 172.16.0.0 netmask 255.255.0.0 {
>
>--->>  option routers 10.31.3.10;
>
>>      pool {
>>         range 172.16.0.1 172.16.255.254
>>      }
>> }
>> 
>> then when I get the relayd req from 3.10 then dhcp says there is no
>> network configured for 3.10 (unknown network segment).
>
>Insert the line with "option routers 10.31.3.10" and you're in
>business.

No that won't work. Normal IP routing rules say that a router gateway
must be on the same IP subnet. Otherwise how does the client know how
to route packets to 10.31.3.10 from 172.16.x.y?

regards,
-glenn