Re: ADSL-DHCP conflict

Tech-Archive recommends: Repair Windows Errors & Optimize Windows Performance

From: Cris Hanna [SBS-MVP] (crisnospamhanna_at_computingnospampossibilities.net)
Date: 02/18/05 

Date: Fri, 18 Feb 2005 04:54:32 -0600

first of all. will the DSL device support an ethernet connection as well as
usb? If not you should contact the DSL provider for a different modem, one
that will.

Secondly if SBS detects a second dhcp server on the network it will shut its
own down...period.

To get around this you need one of the fairly inexpensive DLink, Netgear,
Linksys, or SMC (or one of the other brands) Cable\DSL routers.

Plug the ETHERNET connection from the DSL modem to the WAN side of the
Router.

Connect the LAN side of the Router to a second NIC in your server. Assign
the second nic a private IP address in the same subnet of your router, but a
different subnet from your SBS. Turn off the DHCP function of the Router
on the LAN connection side.

Re run the connect to the internet wizard.

If you had to install software on your server to support the DSL connection
(PPPoE), remove it and ensure the router you purchase supports the PPPoE
protocol and you will enter your username and password in the router and it
will handle what the software was doing...only better and probably without
causeing server issues.

This will eliminate your SBS DHCP server shutting down 

-- 
Cris Hanna [SBS - MVP]
---------------------------------------
Please reply only to the newsgroup and not to me directly so that everyone 
can benefit from the information
"ymiljan" <ymiljan@discussions.microsoft.com> wrote in message 
news:4FC391C5-9178-4B07-9625-3BCD4EDDA7B5@microsoft.com...
> Win 2003 SBS is on 0-24. and we have the ADSL  for two weeks
> In the last 3-4 days in the morning - the LAN is down (9 clients). The 
> DHCP
> server is not connected, and the DHCP server service is stopped.
> The Server wasn't restarted (the Up-time corresponds with the previous
> morning)
>
> I am able to make it work when I disconnect the ADSL router (physically -
> plug out the power and the USB cords). After this I mannualy start the 
> DHCP
> service, restart the server, and then (only after the clients are turned 
> on)
> turn the ADSL back on.
>
> This configuration works flawlessly until undetermined time of evening,
> night or morning. On the next morning the ADSL is running, but the LAN is
> down.
>
> The log says that DHCP server noticed the 'second server' on the LAN, at 
> the
> adres 10.0.0.2 (which is the address of the ADSL router) and it didn't
> started.
>
> Clients are all WinXP SP2, if of any importance all PCs including server 
> are
> DELL  (Poweredge 400SC).
>
> What can I do to avoid this annoyance of restarting the LAN every morning?
> Just stopping the ADSL and starting the DHCP server doesn't help. Not to
> mention that I need to go to some holidays in this lifetime and the rest 
> of
> the staff is not skilled enough.

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