DHCP Server Issue

I have taken the role of a DCHP Server and moved it to another. I
made a backup of the database from the old server and then restored it
on the new server. There were only 2 subnets, so it really isn't a
complex setup, but I didn't want to go through each reservation
again. The problem is that one subnet: x.x.120.x /24 cannot receive
an ip from the new dhcp server. I have unauthorized the old and
authorized the new. I have made sure that the subnet is active.
What's weird is that on the subnet x.x.1.x /24 DCHP works from the new
server. What's even more weird is that if I deactivate the new
server's scope of x.x.120.x /24 and activate it on the old server, I
can pull an IP. What am I missing here?

Thanks,
Matt

Hello RemyMaza,

If between the subnets is a router, make sure that the router nows the new
DHCP server to forward the request. Or if in the other subnet is a DHCP relay
agent, check that this one is also correct working.

Best regards

Meinolf Weber
Disclaimer: This posting is provided "AS IS" with no warranties, and confers
no rights.
** Please do NOT email, only reply to Newsgroups
** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm


> I have taken the role of a DCHP Server and moved it to another. I
> made a backup of the database from the old server and then restored it
> on the new server. There were only 2 subnets, so it really isn't a
> complex setup, but I didn't want to go through each reservation
> again. The problem is that one subnet: x.x.120.x /24 cannot receive
> an ip from the new dhcp server. I have unauthorized the old and
> authorized the new. I have made sure that the subnet is active.
> What's weird is that on the subnet x.x.1.x /24 DCHP works from the new
> server. What's even more weird is that if I deactivate the new
> server's scope of x.x.120.x /24 and activate it on the old server, I
> can pull an IP. What am I missing here?
> Thanks,
> Mat

On Mar 5, 9:54*am, Meinolf Weber [MVP-DS] <meiweb(nospam)@gmx.de>
wrote:
> Hello RemyMaza,
>
> If between the subnets is a router, make sure that the router nows the new
> DHCP server to forward the request. Or if in the other subnet is a DHCP relay
> agent, check that this one is also correct working.
>
> Best regards
>
> Meinolf Weber
> Disclaimer: This posting is provided "AS IS" with no warranties, and confers
> no rights.
> ** Please do NOT email, only reply to Newsgroups
> ** HELP us help YOU!!!http://www.blakjak.demon.co.uk/mul_crss.htm
>
>
>
> > I have taken the role of a DCHP Server and moved it to another. *I
> > made a backup of the database from the old server and then restored it
> > on the new server. *There were only 2 subnets, so it really isn't a
> > complex setup, but I didn't want to go through each reservation
> > again. *The problem is that one subnet: *x.x.120.x /24 cannot receive
> > an ip from the new dhcp server. *I have unauthorized the old and
> > authorized the new. *I have made sure that the subnet is active.
> > What's weird is that on the subnet x.x.1.x /24 DCHP works from the new
> > server. *What's even more weird is that if I deactivate the new
> > server's scope of x.x.120.x /24 and activate it on the old server, I
> > can pull an IP. *What am I missing here?
> > Thanks,
> > Matt- Hide quoted text -
>
> - Show quoted text -

I did read that this is necessary for DHCP to work and it must be
working since I can activate the old DHCP and grab an IP address.
Would the router have a hard coded IP address to only allow this type
of traffic from a certain IP?

Thanks,
Matt

"RemyMaza" <(E-Mail Removed)> wrote in message
news:a2af6c8f-9d64-4b4c-beaa-(E-Mail Removed)...

I did read that this is necessary for DHCP to work and it must be
working since I can activate the old DHCP and grab an IP address.
Would the router have a hard coded IP address to only allow this type
of traffic from a certain IP?

---------------------------------------------------------------

Matt,

Think through what you had to start with. You had a DHCP Server handling two
subnets. That can only happen if the LAN Router between the subnets is
configured to forward DHCP Queries to the DHCP Server. Without that the
queries can never cross the router, and hence never get to the DHCP server.

So you replaced the DHCP Server,...meaning that it probably has a new
IP#,...meaning that the LAN Router is probably still forwarding the queries
to the old IP#,...hence the old DHCP works when you enable it but the new
one doesn't.

So,...fix the LAN Router's configuration to foreward the DHCP Queries to the
new IP# instead of the old one.


--
Phillip Windell
www.wandtv.com

The views expressed, are my own and not those of my employer, or Microsoft,
or anyone else associated with me, including my cats.
-----------------------------------------------------

On Mar 5, 11:11*am, "Phillip Windell" <philwind...@hotmail.com> wrote:
> "RemyMaza" <RemyM...@gmail.com> wrote in message
>
> news:a2af6c8f-9d64-4b4c-beaa-(E-Mail Removed)...
>
> I did read that this is necessary for DHCP to work and it must be
> working since I can activate the old DHCP and grab an IP address.
> Would the router have a hard coded IP address to only allow this type
> of traffic from a certain IP?
>
> ---------------------------------------------------------------
>
> Matt,
>
> Think through what you had to start with. You had a DHCP Server handling two
> subnets. *That can only happen if the LAN Router between the subnets is
> configured to forward DHCP Queries to the DHCP Server. *Without that the
> queries can never cross the router, and hence never get to the DHCP server.
>
> So you replaced the DHCP Server,...meaning that it probably has a new
> IP#,...meaning that the LAN Router is probably still forwarding the queries
> to the old IP#,...hence the old DHCP works when you enable it but the new
> one doesn't.
>
> So,...fix the LAN Router's configuration to foreward the DHCP Queries to the
> new IP# instead of the old one.
>
> --
> Phillip Windellwww.wandtv.com

>
> The views expressed, are my own and not those of my employer, or Microsoft,
> or anyone else associated with me, including my cats.
> -----------------------------------------------------

WORD!

Thanks for your help,
Matt