DHCP Problem

From: Umesh Thakur (UmeshThakur_at_discussions.microsoft.com)
Date: 03/21/05 

Date: Mon, 21 Mar 2005 05:59:06 -0800

I have a strange DHCP server issue...Let me explain the current setup...
I have 4 subnets:
        172.21.136.0/24, 172.21.137.0/24, 172.21.138.0/24, 172.21.139.0/24
There is a DHCP server 172.21.136.21 (Windows 2003 Server). All subnets are
connected to workgroup
switches and these switches are connected to Layer-3 switches that also
perform the task of routing.
I have created 4 scopes for these 4 subnets with respective scope options.
DHCP relay agent is enabled on the Layer-3 switch so that this single DHCP
server can provide IP addresses
to clients.

Apart from these, we have few more subnets in another building connected
through metro-ethernet link of 6MBPS.
Subnets on other building are:
        159.217.58.0/24, 139.54.132.0/24, 159.217.103/24
Now, what my problem is: sometimes my client get IP addresses from DHCP
server of 159.217.103.0 subnet,
sometimes from some other subnet in the intranet, i believe that im not
aware of (like 192.168.0.0/24).

I also periodically checks to make sure that scopes have enough IP addresses
to lease to clients.
How do I make sure that my clients gets IP from DHCP server here
(172.21.136.21)?

Thanks in advance for your kind reply.
Should you require any more input from me, do let me know...
Umesh

Relevant Pages

  • Re: DHCP Client registration problems
    ... We only run a single DHCP server. ... clients but a helper address has been configured so that the DHCP requests ... > Configuring Multiple DHCP Servers for the Same Superscope ... > subnets, using placeholder values for subnets it does not supply addresses ...
    (microsoft.public.windows.server.networking)
  • Re: RRAS (2k3 server): dial-up clients cant authentificate
    ... DHCP server is on the same computer. ... RRAS use static adress ... In local network are two routed subnets 192.168.0.0, ... > In local network are two routed subnets 192.168.0.0, ...
    (microsoft.public.windows.server.general)
  • Re: DHCP - DEFAULT GATEWAY ISSUE
    ... Ian wrote: ... for three different subnets separated by cisco routers. ... clients on the subnet with the dhcp server are all setting the ... All other clients on remote subnets ...
    (microsoft.public.windows.server.networking)
  • Re: DHCP for various subnets
    ... consider when providing a DHCP server for servicing various subnets? ... A "scope" for each such subnet. ... not unless you use all three subnets on the same "broadcast domain" ...
    (microsoft.public.windows.server.active_directory)
  • Re: dhcp server - one mac on multiple subnets
    ... The problem is that my setup should work for a relay agent with option 82 support. ... The network topology looks like this (with some 20 subnets): ... A dhcp server with support for this, can based on this information give the client the appropriate ip address. ... Either the router is just doing dhcp relaying withoutoption 82 support, or isc dhcp server does not support option 82, but I think isc dhcpd does. ...
    (Debian-User)