Reserved IP causes no internet connection

[boomerang]

Here's the situation.

Three computers behind a router with a DSL connection. Been going along fat dumb and happy for years. I set one of the computers up with a reserved IP and none of the computers can connect to the internet. The network functions normally otherwise.

I restore to DHCP for this machine and all computers can connect. But, only after a five to ten minute delay. I can reset, reboot to my hearts content. I still have to wait it out. Once internet connectivity is established, all is good. Forever, until I try the reserved IP again.

I have not tried reserving an IP for all machines.
Also have not tried turning off DHCP and setting an IP up on each machine.

I see no reason why what I am doing would not work, but I am no expert.

Router is on latest firmware. I'm thinking the router is flakey.

 

[Lordicus]

If by setting a reserved IP you mean that you statically set the machines IP, then have you checked to make sure its on the same subnet as the router.
Does it have a valid default gateway? Valid DNS entries?

If you have local network connectivity try running tracert to a website. That should point you in the right direction.

Hope this helps.

 

[boomerang]

No, in the router configuration you can assign computer "A" an internal IP. It's done using the MAC address.

The rest of the computers, "B", "C", "D" etc., will receive an IP through DHCP and could receive an IP anywhere within the IP range specified in the router.

But when computer "A" boots, the router will always asign it the same internal IP.

I need to connect to computer "A" from the internet and need to be able to find it behind the router.

I did a lot of research last night, and although I can't find anything on this specific problem, I think my next step will be to redetect the connection type after setting up the reserved IP. I think the router is just getting "confused". The key being that none of the computers can connect to the internet.

 

[boomerang]

After much hair pulling a hard reset of the router straightened everything out.

 

[Lordicus]

Doh!

 

[boomerang]

No kidding!