Re: ONE Linux DHCP Server + Multiple VLANs - Soluble problem?
From: Philippe WEILL (Philippe.Weill_at_aero.jussieu.fr)
Date: 07/28/05
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Date: Thu, 28 Jul 2005 16:49:52 +0200
Ad wrote:
> Hi everyone. I hope some of you could help with this headache problem
> because I've really tried thousands of dhcp and interfaces configs
> without success why does WinNT4 manage handle it and not the latest
> linux kernel...
>
> --- NETWORK SETUP ---
>
> My company have 3 Cisco 3500XL switches and one Cisco Catalyst 4006
> router.
>
> Every switch act as a VTP Client to the Catalyst which acts as a VTP
> Server. My current configuration uses the old Windows NT4 as DHCP and
> DNS server and a linux box as a file server.
>
> I have configured 4 VLANs (100, 200, 300, 400), and my Windows NT4 box
> assigns DHCP adresses to the current VLANs with the rigth VLAN IP.
> Everything works fine. The servers are in VLAN 100 and the other office
> computers are in the others.
>
> Now, I setup a linux box (Debian 3.1 stable, customized 2.6.12 kernel
> with 802.1q as a module and VLAN support as static)
>
> I compiled vconfig tool from the kernel sources, I checked if the
> driver of my 2 NIC cards (3c509c) is correctly patched to handle VLAN
> Trunk. It's ok.
>
> I can add with vconfig new vlan interfaces on my linux box, it works
> without freezing the entire box. Until now, no problem.
>
> The DNS server is up and running, I can switch off the windows box and
> the linux box can take the job. But...
>
>
>
you could also use the cisco vlan router to forward dhcp request to your
server with something like
interface vlan 300
ip address xxxx mask
ip helper-address my-dhcp-server-ip
no shutdown
Like this your server as only one ip address needed
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