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Had a odd problem

post #1 of 3
Thread Starter 
So I had a odd problem the other day. I built up a pc with an asus M4N with a nvidia 630a chipset with onboard gigabit lan, install xp fine as well as the MB drivers. Now the problem.....

When I connected it to my router it tried to get an ip but failed and said limited connectivity, and gave its self private ip (169.254.x.x or something my ip ip 192.168.1.1), then i say ok, i'll manually enter the settings, then it says its connected fine but can't ping anything!! Not even the router, no internet nothing. Do a lot of switching off and on (installing xp again, then trying windows 7), going back and forth between dhcp and manual but still nothing... Now i'm pretty stumped, then I tried another router, and it tries to get an ip and fails but then it assigns the ip after saying its limited connectivity, but once again can't ping anything or connect to anything, and I tired the same stuff as with the other router.

So at this point i'm about to buy a new network card cause this onboard one is just not working, but then for some very very strange reason I change the mac of the onboard nic, and then bang it works!! I know the mac helps decide what address you get from dhcp, so you get same ip most of the time (if its not taken) but i'm really confused to why nothing worked before but by changing it fix'd the problem, and why manual setting's didn't work.
post #2 of 3
That's an Apipa address, basically what you get when windows can't receive a "real" address.
MAC is the underlying foundation of TCP/IP. Even though it looks like you connect to an IP address in your network, on a lower level the PC still "asks around" which MAC address has the IP you are requesting to connect to.
    
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CPUMotherboardGraphicsRAM
Q6600 SLACR @ 3.6 GHz Asus P5E Deluxe MSI 6950 2 GB + 9800GT (PhysX) 4 GB White Lake DDR2-800 
Hard DriveOptical DriveOSMonitor
Hitachi 500 GB Sata iHas 120 Windows 7 Pro x64 u2711 (27", 2560x1440, H-IPS) 
KeyboardPowerCaseMouse
Generic Dell Combat Power 750W Aerotech PGS Bx-500 Logitech Rx300 
Mouse Pad
Desk 
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Reply
post #3 of 3
Thread Starter 
Quote:
Originally Posted by citruspers View Post
That's an Apipa address, basically what you get when windows can't receive a "real" address.
MAC is the underlying foundation of TCP/IP. Even though it looks like you connect to an IP address in your network, on a lower level the PC still "asks around" which MAC address has the IP you are requesting to connect to.
Agreed, but the question is, when the default mac was used it couldn't connect to anything, but when I changed the mac to something else all was great.

I will have a look at the PC again this week and give its real mac. I feel the mac wasn't real (an impossible mac) cause I looked up the first 6 numbers and couldn't find a company which uses that one
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