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Having server take over DHCP no internet access SBS 2011 Essentials

Posted on 2014-02-18
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Last Modified: 2014-02-20
I installed a server with SBS 2011 Essentials on it.  I disabled the router(Linksys E2000) from doing DHCP and enabled it on the server.  Was having an issue with getting internet access.  I ended up manually setting up the computers with static IP's and that seemed to solve the computers connected by wire and even a laptop that connected over wireless.  The next issue was portable devices connecting to the wireless were not getting internet connection.  I ended up turning the DHCP, on the router, on again and devices were working again(I know I can't leave both running).  I've done this setup a few times, but never with sbs 2011 essentials, and have not had a problem.  Am I missing setting something up on the server or the router?
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Question by:gseales
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gurutc earned 500 total points
ID: 39868391
Hi,

What values are you configuring in the SBS-based DHCP for gateway and DNS?
Are they the same as what the router hands out?

- gurutc
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by:CompProbSolv
ID: 39868424
A good test to point you in the right direction is to run ipconfig /all on a workstation when it is unable to connect (with server-based DHCP) and then when it IS able to connect (with router-based DHCP).  In particular, make note of the IP (IPv4) address, subnet mask, default gateway, and DNS server.  The difference between those values in both cases will clue you into what is wrong.

Also, when you say that the devices are not getting an internet connection, pin it down to a connection or DNS issue.  At a CMD prompt type:
ping 4.2.2.2
ping google.com

If the first one works (you get four valid replies), you are (technically) connected to the internet.  If the second one fails (and the first one works) then the issue is DNS (name resolution).


gurutc is on the right track.  You likely have the server's DHCP settings for gateway or DNS set up incorrectly.
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by:gseales
ID: 39868471
I knew there was something wrong about it not getting the gateway, but did not know why.  I completely forgot about setting up the Scope Options and did not have 003 Router configured.  Will have to go and test that out later today.  Will update later.
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