Just through I would mention it in case anyone else comes across this problem with D-Link. I checked the release notes after and there was no mention in the release notes about this being an issue. I ended up doing a firmware update, which fixed the problem permanently. Unplugging the D-Link fixed the problem (DHCP leases given out with the D-Link as the default gateway). There must have been two devices responding to DHCP at the same time - the D-Link and the main router, except that the D-Link was always quicker to give out the leases. configured on the actual DHCP server was the same, only the gateway was changed to the D-Link's IP address. I suspect that when DHCP was turned 'off' in the settings it was actually still turned on, maybe in attempt to be a DHCP relay agent, because all the DNS settings etc. I don't remember which model it was, it was for a client. What I would suggest is you also change the router your going to use as ap lan IP to something that is on your first routers network, outside its dhcp scope of course so that you can then access the now AP and setup its wireless network how you want, ssid, psk, security options, etc. My guess is more that you dlink did not actually turn off its dhcp server, etc.īut you are correct turning off dhcp and just using a lan port is how you use any wireless router as just an accesspoint. There would be no possible way for the dlink to mess with those packets. So your saying that your dlink intercepted this packet, and changed the dhcp option (3 I do believe) in the packet to its IP, and then resent the packet? What about devices that were connected to the routers lan port, or the switch. That broadcast will go out every port on its lan switch, then every port on switch and should go out then every other port on your AP dlink, and the wireless even. Any dhcp server on the network that sees that will send out a dhcp offer, again broadcast to 255.255.255.255, lets assume this is your router. Now your client sends out dhcp discover broadcast. So you have say router 1 with a few lan ports, maybe even another switch hanging off 1st router, then say your dlink being used as AP plugged into either first router lan or switch. And what dlink was that - I really find that hard to believe with the way that dhcp works.
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