DHCP subnet

pat patkumar82 at gmail.com
Tue Apr 12 07:50:46 UTC 2011


Hi Jose

How would you do that can you please explain , the giaddr field will be
present in the dhcp handshake message not sure it will be there in the data
traffic from client to pdn....need to check that ....


2011/4/11 José Queiroz <zekkerj at gmail.com>

>
>
> 2011/4/11 pat <patkumar82 at gmail.com>
>
>> Hi Simon
>>
>>
>> "If I read this right, you have a relay box of some sort, and you want to
>> somehow second guess the IP address the client is going to get - in advance
>> of the server allocating it ?"
>>
>> Yes perfect, i need to do some sort of query to the dhcp server to get the
>> subnet configured that the server is ready to offer.
>>
>>
> Hi, should't the GWIADDR field in DHCP header deal with this situation?
>
>
>> The reason for doing this is my box will be relay as well as a gateway to
>> the packet data network, where DHCP server A is placed in normal wireless
>> network and DHCP server 2 in the some sort of customized network such as
>> wifi, i wanted to put the check list in my box and map the client ip with my
>> database of Ip address, (worst case CLIENT X gets one Ip from DHCP A and
>> second IP from DHCP B for two different network access) .
>>
>> without knowing the ip address range of the DHCP server A and B i can't
>> route with differential routing schemes
>>
>> Is there a way to get the subnet information by query from dhcp relay
>> server
>>
>
> As long that the dhcp relay is configured, it should do this identification
> automatically, AFAIK.
>
>
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