Solved routing less hops on an internal network without external

December 24, 2012 at 07:35:40
Specs: Windows 2000

networking multiple home routers

I have 3 routers connected due to the different locations of my computers. 1 of those being from my ISP. I have 2 servers on these networks 2 laptops, and two desktops.

Anyway for some reason, one of my servers (Windows 2000) and my desktop (Windows 7) both on the same router which is just being used as a switch, DHCP disabled have a communication issue. When they both traceroute, they go external of my network through the isp just to come back and find one another.

I don't have this problem with any other machine. I have a laptop and a server (Windows 2003) on my other router which has DHCP enabled. When i traceroute to either one of the other machines I get a direct 1 HOP.

My only issue is when these to machines attempt to connect to one another. This also causes other issues like 'Trusts'.

What could be the problem?


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✔ Best Answer
January 7, 2013 at 18:57:57

Yes when I did a traceroute from one machine to the next it route out of the internal network. I figured it out though. The ipconfig/all, I did that way before I posted this. Guapo I used dhcp on the switch when I was not using the server. The router/switch comes with dhcp on it. It is one of those netgear internet routers. I did configure the sever accordingly and disabled it on the router.


#1
December 24, 2012 at 10:39:33

My guess is that it has something to do with the IP addressing & gateway settings. It almost sounds as if those computer are in the DMZ, which would mean that they can be seen from the outside.

Run ipconfig /all on both of the machines, in question. Post it here if you don't see the solution.

How do you know when a politician is lying? His mouth is moving.


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#2
December 24, 2012 at 11:24:09

I don't think they are in the DMZ. The router thats the gateway translates inside and outside addresses. I did ipconfig on all of them prior. Same network, same subnet. Anything connected to the ISP router would be in the DMZ but I don't have anything plugged into it other than the gateway router which I have chained to the other router being used as a switch.

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#3
December 24, 2012 at 12:04:37

I think I found the issue. DHCP and DNS is on the router being used on the gateway and not the switch, so when the node tries to find the other node it crosses over from the switch to the router to resolve the names. For some reason, it can not find an entry and resorts to going out the gateway.

My only other issue is figuring out how to resolve this.


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#4
December 24, 2012 at 13:13:55

DHCP & DNS aren't supposed to be used on the switch, AFAIK.

How do you know when a politician is lying? His mouth is moving.


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#5
December 25, 2012 at 21:40:29

Your post is not really clear.

have a communication issue. When they both traceroute, they go external of my network through the isp just to come back and find one another.

This makes little or no sense to me. When you traceroute what exactly?

If the two machines are having issues communicating then they cannot "go external of my network through the isp just to come back and find one another

If they're clients within the same network, communication between them should never leave that network and if you're doing traceroute from one of them to the other, I can't see how it could go external of your network and return.

In response #1 Guapo clearly asks you to run ipconfig and post the results here. Instead of guessing at the answer, do as you've been asked and let us help you figure it out.

I would highly recommend doing the ipconfig /all command on both computers that are having issues, and again on a third box that isn't. Lable the output appropriately to which computer it's coming from.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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#6
January 7, 2013 at 18:57:57
✔ Best Answer

Yes when I did a traceroute from one machine to the next it route out of the internal network. I figured it out though. The ipconfig/all, I did that way before I posted this. Guapo I used dhcp on the switch when I was not using the server. The router/switch comes with dhcp on it. It is one of those netgear internet routers. I did configure the sever accordingly and disabled it on the router.

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#7
January 8, 2013 at 07:11:52

So if I'm reading your last response correctly, you had DHCP server running on a SOHO Router and on a server within your LAN and they were conflicting. You disabled DHCP on the router, and now everythying is working correctly.

I'm glad you figured it out and got it fixed and thank you for reporting back here with the fix. You never know, in the future you may just help somebody else who's having the same problem.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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