two dhcp problem

[Simon Hobson]

José Ortiz wrote:

>I had only one authoritative dhcp server, which 
>is configure to give dhcp parameters only to 
>known clients and it works correctly, the 
>configuration only consist in one subnet a we 
>add all know clients using a host declaration. 
>We decide to add other dhcp server in a 
>different subnet that share the same fisycal 
>networt with the fist one, the configuration is 
>the same in both servers only differs the subnet 
>and the set of clients.  All linux and mac 
>clients are able to adquire dhcp paramtres from 
>the server where they are known clients, but 
>some windows clients if they recieve dhcpnack 
>from the server where they are unknow clients 
>always keep waiting and never adquires dhcp 
>information and if i stop the server that 
>doesn´t know thier, They immediatly get the dhcp 
>parameters. Someone has been a similar problem?

You need to define both subnets on both servers.

When a client in subnet A tries to acquire a 
lease, server A will offer and address and server 
B will ignore it. The client will then request 
the address, but server B will always DHCP-NAK it 
as being invalid for it's subnet.

So you need to define subnet B on server A, and 
subnet A on server B - they can both be empty 
declarations like this :

subnet a.b.c.0 netmask 255.255.255.0 {
}

Once you do this, each server will silently 
ignore clients when they request an address on 
the 'other' subnet.


PS - don't worry too much about your English, 
it's better than a lot of English people can be 
bothered to write !

-- 
Simon Hobson

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anyone knows where I might get hold of one I'd be 
grateful - requests to Canon drew a blank, it's 
been out of support for years.

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