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I'm trying to network two computers (via ethernet) so they can share a DSL internet connection. I have a router/switch that both computers are connected to. One computer connects to the DSL just fine. The other can't contact the switch's DHCP server and defaults to a 169.254.*.* IP address. We swapped the cables and NICs between the two computers and the problem persists no matter what NIC or cables are used on the problem computer. Both computers are running Windows XP Home Edition. Reseting the TCP/IP stack yields no results on the problem computer. Pings to 127.0.0.1 or the computer's self-assigned IP address are successful, but pings to the router (192.168.1.1) or the other computer on the network result in "Destination host unreachable." Manually setting the IP address has no effect and the computer still can't access the network, but when the router is pinged with a manual IP set, the result is "Request timed out." instead. The problem computer was able to connect to the internet for about three days before this problem came up. I've reinstalled the NIC drivers twice. Link lights on the NIC and router are doing what they're supposed to. I've disabled the firewalls with no success. Any help is very deeply appreciated!
If you only boot this one pc [other is connected] you still don't get a ip address?
Sounds like a nic card failure to me.
Especially when you do a manual assignment in the expected ip range of the router and get distination unreachable.
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I've swapped the NICs and that computer still can't contact the router and the NIC worked in the computer that doesn't have the problem, so I'm sure the NIC works. And if DHCP scope refers to the range of IP addresses the switch can assign, anything in the 192.168.1.* range is available (besides the switch's address - 192.168.1.1).
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Set the manual IP for both PC's as 192.168.1.2 and 192.168.1.3 ,
now try to ping each other. from 192.*.*.2 to 192.*.*.3 and so on from 2nd to first one.
what is the result.
?admin@paklight.net
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I manually set the IP addresses to the ones specified, but both computers' attempts to ping each other result in "Request timed out."
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On the computer that does not work have you checked to see that the TCP/IP is set to "Obtain an IP address automatically".
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Yes, and the computer can't communicate with the switch, so it assigns its own IP address as 169.254.*.*.
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