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TOPIC: two dhcp servers clashing on thesame LAN

Re: two dhcp servers clashing on thesame LAN 10 years 7 months ago #28024

  • sose
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I am trying to see if I can go to the advance routng on the setup page of the linksys to configure static routing too

giving it a LAN IP of say 10.0.0.0

Re: two dhcp servers clashing on thesame LAN 10 years 7 months ago #28030

  • S0lo
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I'm assuming here that the modem does not have a built in wireless AP. Thats why you need the linksys. Right?

what do you mean by the modem having one wireless port.

The modem will accept DHCP traffic through your linksys and at the same time you use the wireless feature of the linksys.


rather I think it is the linksys that will accept dhcp traffic from the modem


I meant using the linksys as a switch not a router.

I cant quite figure out the first config on the router which has an option of static or dhcp which is different from the option of starting the dhcp server .


Static probably means static IPs, it should disable the DHCP server.

Lets simplify it. After putting the linksys on static (disable DHCP). When you wire a PC to one of the linksys ports. And wire the linksys to the modem. Can you browse the net?
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Re: two dhcp servers clashing on thesame LAN 10 years 7 months ago #28094

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when I sellect static IP the router will then demand for a live IP(public IP) , subnet mask and default gateway. unfortunately my ISP has configured NATTINg on the modem so that I can only see a private IP as my default gateway of 192.168.1.1 but the public IP is hidden from me plus I cant even ping my modem . I think I have to contact them

but to save the market of my client I have temporarily cabled his 20 systems discarding the router

Re: two dhcp servers clashing on thesame LAN 10 years 7 months ago #28105

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when I sellect static IP the router will then demand for a live IP(public IP) , subnet mask and default gateway. unfortunately my ISP has configured NATTINg on the modem so that I can only see a private IP as my default gateway of 192.168.1.1 but the public IP is hidden from me plus I cant even ping my modem . I think I have to contact them


I thought that the setting is for the built-in DHCP server on the linksys. But this is obviously the setting for the DHCP client in the linksys were it accepts IPs from the ISP. Thats totally different. What I'm suggesting is making the linksys work as a simple switch (without using it's WAN (adsl) port), in other words, it doesn't need an IP (granted that I'm not mistaken here :roll:).

I wonder, is what you see similar to this:



If so, then select the disabled option. But you can leave "Automatic Configuration - DHCP" as it is. And offcourse, connect the modem to one of the LAN ports of the linksys.

I don't expect it to work easily as this is not a standard procedure or the typical way of operation, you might need to do some further tweaking.
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Re: two dhcp servers clashing on thesame LAN 10 years 7 months ago #28124

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I chose static instead of automatic config(dhcp), I tried using the router as a switch without using the WAN port but still doesnt work

I will keep trying - plannong to contact linksys

hey sose i thnk i get the scope of ur problem..... 10 years 7 months ago #28162

if i understand the problem correctly Sose. from my past experience the modems that come with in built dhcp are the Idirect modems well may be u using a different one. the same problem u facing is wat i tackled last 2 weeks @ the Federal Capital University here in Nigeria. Sorry i am just replying this post i have been following up a conversation BTW Zippy and I.

Well what we did and since ISP will not grant you access to their modem we just configured a server (we installed FreeBSD / i386) then got all 3 ip addresses then configured the new BSD server to now do the distribution and u see why i said i love linux and i will never configure a server with window's OS (sorry to the windows lovers. please don't beef, i still run win vista on my 50gb partition on my laptop).

Since i now have a Linux server which will surely do dhcp then all i did was to get an Access point then plug it to my switch and everything been fine since then. in case ur client (cos i knw there are stubborn clients who are tuned to windows alone) does not want the Linux idea cos they feel is complex. (cumbersome) u might try something crazy by still using ur router then on the settings u use automatic, but it might give u problems (it will).

this tips should work for u man sose. less i forget how's ur work.
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