D-Link Forums
The Graveyard - Products No Longer Supported => Routers / COVR => DIR-655 => Topic started by: lawrencehare on March 08, 2010, 08:47:46 AM
-
I wonder if anyone can help me debug this problem that started last night and has me totally bamboozled.
I have a 25 IP device network all switched through an HP Procurve or running wirelessly. I have a SONOS 5-zone system that all runs wifi, a bunch of fixed and mobile computers, NAS, printer, VoIP telephony and so on.
Until recently all devices used DHCP. We get a lot of power failures however and I found that confusion would often arise amongst the wifi devices as IP address conflictions arose. To fix this I defined a set of IP address ranges for the wifi stuff based on Mac address and set this up in the DIR-655. This seems to have worked perfectly.
Over the weekend I extended this concept to most of the other equipment. Laptops continued to rely on DHCP to get whatever address was next, but all fixed devices received a fixed IP based on MAC addresses. All this worked too.
Only, last night, when I stuck my laptop on-line to sync it with the desktop, it would not get an IP. The thing would default to its fixed default IP after failing to get a local network DHCP IP address. Never had this happen before.
I forced it to a known IP and mask that was free and it worked fine. I ran the sync. I undid this and used DHCP again and got the fixed IP once more. I set the laptop's MAC address into the router with an IP that fit the pattern I had been implementing and did a renew and it got the new IP I had defined. So it is working fine. But when I try to simply get a straight IP from DHCP using whatever address is next in line, it fails.
Does anyone have any idea why this might be happening? It was fine before I added the final bunch of MAC->IP address mappings. We have two laptops in regular use and the kids all bring in a bunch more, I have not tried this with any other laptop yet, but I do need to ensure it works with my laptop, which it does not!
How can I figure out what is going on? No IP is assigned in the router IP table for my laptop when this fails so it is as if the DHCP broadcast, selection or ACK is not taking place, yet when I use a fixed IP or the MAC/IP mapping it works flawlessly. There is no MAC duplication. I do not think there is a communication problem. Most of the computers are OS X 10.6.3 or Windows 7 or XP. The laptop is OS X.
Any ideas?
Thanks - Lawrence