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24 posts

Geek


Topic # 18188 31-Dec-2007 21:34
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Hello, guys how are you doing?


In this small office network, first let me give you full information about the network topology. I have DHCP server connected to the SWITCH through this DHCP 6 Computers are connected just accessing software from the server. Meanwhile, I connected a Router to the same SWITCH. This Router has not Static IP-Address and it supposes to be DHCP, but I turned off DHCP in the Router because 2 DHCP make conflict for sure they made conflict. I have tried it once. The IP-Address of the server and the Router are in the same class "C". Right now, the problem is with the Router, even though, the Router is connected, I can't access an internet and the error message says: “DNS unreachable" and also some times I access 1 or 2 websites only. I don't know what to do? Do you think the problem is due to both of them in the same SWITCH?

If I change the IP-Address of the Router to class "A" or "B" just to enable the DHCP in the Router, do they make conflict with the server even if, they are not in the same class? I mean two different classes DHCP connected in one SWITCH.

 N.B. i forgot, i shared the Router from the same SWITCH to another 6 PC internet users only.





Please guys I need your help May be I am making mistakes?

Thank you very much


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95 posts

Master Geek


  Reply # 102471 1-Jan-2008 13:08
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The cause will be that the DHCP server you are using is passing out it's own address as the DNS server for the network.

From a Windows Command Prompt run

    IPCONFIG /ALL

and it wiill probably tell you that the DNS is pointing to your server or whatever is DHCP.


You can correct this by making your server act as a DHCP proxy or by telling the DHCP server to pass out the router address as DNS (as well as itself).


In the short term you can tell your workstation NOT to automatically get DNS address from the server but to use the router or your ISP's DNS (as well as your server).

What is the DHCP server?


DS





24 posts

Geek


Reply # 102509 1-Jan-2008 20:39
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Thank you very much signzCool


What you are saying is absolutely true and am gonna do it.

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