Hi, i need this one v urgently.
ok, heres my question,
I have 8 computers (pc1 to pc8), all with windows xp pro sp2 installed, connecting to the internet through a prolink adsl/router modem. they are all connected to a 10mb hub, all comps having assigned dynamic ips through dhcp in the range 10.0.x.x
recently i upgraded my hub to a dlink des-1016d switch, and now only 2 of my computers can assign ips automatically throug dhcp. the other computers are having 169.254.x.x ip range. when i change this manually to the dhcp range it doesnt work. any suggestions?
axrial
ps. i need answer asap
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C:\>ipconfig /all
Windows IP Configuration
Host Name . . . . . . . . . . . . : SERVER
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Unknown
IP Routing Enabled. . . . . . . . : Yes
WINS Proxy Enabled. . . . . . . . : Yes
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : 3Com 3C920 Integrated Fast Ethernet
Controller (3C905C-TX Compatible)
Physical Address. . . . . . . . . : 00-06-5B-7E-95-6A
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 10.0.0.12
Subnet Mask . . . . . . . . . . . : 255.0.0.0
Default Gateway . . . . . . . . . : 10.0.0.2
DHCP Server . . . . . . . . . . . : 10.0.0.2
DNS Servers . . . . . . . . . . . : 10.0.0.2
Lease Obtained. . . . . . . . . . : Wednesday, September 28, 2005 7:37:3
2 AM
Lease Expires . . . . . . . . . . : Friday, September 30, 2005 7:37:32 A
M
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i changed as u have said, no response .... the pcs that wont work cant even ping another computer .... thats strange, is it not?
ylandrum,
"make sure the NICs on all the machines are set to auto detect speed and duplex." <<=== how do i do that?
Device Manager, NIC, Properties, Advanced. Some NICs have a single entry called "Speed & Duplex", others have them listed separately; it just depends on the driver. Since the des-1016d is an unmanaged switch, all the ports are auto-negotiate so the NICs need to match.
You can also get there by opening the properties of the network connection and clicking the Configure... button on the General tab.
axrial -- try the following:
(1) On one of your computers that is working correctly (with a 10.0.x.y IP), do an "ipconfig /all" and note the DHCP Server value and the value(s) for DNS Servers.
Post those values here.
(2) On one of your computers that is NOT working correctly, go into the TCP/IP properties (Control Panel, Network Connections, right-click on Local Area Connection, select Properties, select the "General Tab", highlight TCP/IP, click on "Properties") and choose "Use the following IP Address".
Set an IP in the same subnet as your "good" computer, but well out of the range of likely IPs likely to be assigned (we do not want a conflict here). For example, if your "good" computer is 10.0.0.12, then set your "bad" computer's IP to 10.0.0.101.
(3) At the SAME screen you just used to set the IP address, select "Use the following DNS Server(s)".
Set the DNS Server addresses to the same values that were shown for the "good" computer. (If there are more than 2, just use 2 for now -- you can add the rest later on the Advanced tab/DNS)
Reboot the "bad" computer, and see if it is now working okay.
Post the results.
OK; let's see if we can narrow this down. Do you have link lights on all the NICs and all the switch ports? Did anything else change besides the switch? On one of the "bad" pcs, can you ping the loopback address ("ping localhost" or "ping 127.0.0.1")?
Try moving one of the "bad" computers into place of one of the "good" ones and plug it in. Does it still not connect? If it connects, then you have a cabling problem, or perhaps a switch port problem. If it does not, then the problem is somewhere in the PC.
Yes, first check the LED of your NIC and switch. Bad cable shouldn't flash the lights.
Try to plug the computers which can't get IP addresses on another interfaces on the switch.
Then try a "arp -a" command but you shouldn't see that much if there is no communication between the devices.
Is there any filter configured on your router/modem? (Is it a Hurricane 9000?)
When you try again with your old hub, is it working?
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by: Alf92130Posted on 2005-09-28 at 08:21:00ID: 14975648
I use a DES-1016D every day at work, the DHCP works great on it and there is no reason a switch causes problems to DHCP.
Which devices is your prolink adsl/router?
Why is your DHCP scope 10.0.X.X instead of a regular 192.168.X.X ?
Did you try getting the IP addressing disabling the Windows XP firewall? (ipconfig /renew)