Two subnets in DHCP Server

[Tim Frost]

On Thu, 2009-09-03 at 11:16 +0200, Florian Diesch wrote:
> Stephan Schöffel <schoeffel at fh-bingen.de> writes:
> 
> > Hi there,
> >
> > I'm trying to make my dhcp server provide addresses for two subnets. It 
> > works well for the first, but not on the second.
> >
> [...]
> >
> > The server address is 143.93.77.181. Does it have to have another NIC in 
> > the 143.93.79.0/24 net?
> 
> Yes. 


It should NOT be necessary, unless the router at 143.93.79.254 can't
convert a DHCP broadcast to a dedicated (unicast) request to the server
at 143.93.77.181.

 
If the router at address 143.93.79.254 understands how to convert a DHCP
broadcast to a unicast request to the remote DHCP server, it should all
*just work*.  The router will accept the broadcast, and
* encode the VLAN/network that the request was on
* include the MAC address of the PC in the request
* send the response from the DHCP server to the requesting PC

Different routers have different ways of specifying the DHCP server.
Cisco uses 'ip helper-address' (which forwards requests for 8 services,
including time, DNS and netbios UDP services as well as BOOTP/DHCP);
other router brands will have their own way of configuring this.

> 
> 
>    Florian

Tim

-- 
Tim Frost <timfrost at xtra.co.nz>
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