• We’re currently investigating an issue related to the forum theme and styling that is impacting page layout and visual formatting. The problem has been identified, and we are actively working on a resolution. There is no impact to user data or functionality, this is strictly a front-end display issue. We’ll post an update once the fix has been deployed. Thanks for your patience while we get this sorted.

Win7 can't connect to dhcp

R

Ranulf

Platinum Member
So, I have two machines connected to my modem via a switch. The XP machine can connect fine and get an IP from my ISP, my win7 box however cannot this morning. It shows a "public network" but can't identify it and seems to timeout when trying to connect to the dhcp server for an IP when I try to ipconfig /release and /renew it.

The machine was running fine late last night... only issue was I didn't log in immediately to the system on boot up this morning. Any ideas?

I've tried both Nic's on my mobo (Gigabyte EP45 UD3P), no go either way. The modem sees both computers in its setup. I can access the modem's stats/diagnostic's page via the win7 machine and the XP machine.


TIA
 
Win7 when configured on peer-to-peer Network has three types of Sharing configurations.

HomeGroup Network = Works only between Win 7 computers. This type of configuration makes it very easy to Entry Level Users to start Network sharing.

Work Network = Basically similar to the previous methods of sharing that let you control what, how, and to whom folders would be shared with.

Public Sharing = Public Network (like Internet cafe) to reduce security risks.

For best results log to each computer's System Screen and set all the computers to be on a Network with the same name while each computer has its own unique name.

http://www.ezlan.net/Win7/net_name.jpg

Make sure that the Software Firewall on each computer allows free local traffic. If you use 3rd party Firewall On, Vista/XP Native Firewall should be Off, and the active Firewall has to adjusted to your Network IP numbers on what is some time called the Trusted Zone (consult your 3rd Party Firewall instructions

General example, http://www.ezlan.net/faq#trusted

Please Note that some 3rd party Software Firewalls keep blocking aspects of Local Traffic even it they are turned Off (disabled). If possible configure the Firewall correctly, or totally uninstall it to allow clean flow of local network traffic. If the 3rd party software is uninstalled or disables, make sure that Windows native Firewall is On .
Since you have a Network with Win 7 and other version of Windows you need to configure Win 7 as Work Network.
In the Network Center, clicking on the Network type opens the window to the right.
Choose your type of Network. Notice the check mark at the bottom, and check/uncheck it according to your needs.
http://www.ezlan.net/Win7/net_type.jpg
Win 7 - http://windows.microsoft.com/en-us/...mputers-running-different-versions-of-Windows

Win 7 Work Network specific folder sharing - http://www.onecomputerguy.com/windows7/windows7_sharing.htm

Vista File and Printer Sharing- http://technet.microsoft.com/en-us/library/bb727037.aspx

Windows XP File Sharing - http://support.microsoft.com/default.aspx?scid=kb;en-us;304040

Printer Sharing XP - http://www.microsoft.com/windowsxp/using/networking/expert/honeycutt_july2.mspx

Windows Native Firewall setting for Sharing XP - http://support.microsoft.com/kb/875357

Windows XP patch for Sharing with Vista (Not need for XP-SP3) - http://support.microsoft.com/kb/922120

When finished with the setting of the system it is advisable to Reboot all the hardware including the Router and all computers involved.

*Note. Some of the processes described above are done Not for Windows sake but to compensate for different Routers and the way their firmware works and stores the info about the computers that are Networked.



😎
 
Sorry, I don't want to share data between the two computers. I have a router, I just dont use it unless I want wireless active and to network the machines together.

The Win7 machine cannot get an IP from my comcast modem. It just says it is an "unidentified network" and gives me an auto IP in the 169.xxx.xxx.xx range and a non ISP subnet mask. Whereas my XP machine can get to the internet just fine.

Thanks for the quick reply though.
 
You need a router as specified above. Your ISP is more than likely remembering the MAC address of your XP box and considering that one authorized to use the internet.

Buy a router, it is safer and even with a default setup better than plugging directly in to the router.
 
Nah, I get two IPs from my ISP. I "powercycled" the modem first thing to reset the two computers it remembers. The XP system was offline and has been for 2-3 days till I fired it up to test the ISP connection.
 
So, yeah win7 gets cranky with networking... still no idea why it can't talk to the modem/dhcp server directly but it works when behind my router. Modem doesn't remember the MAC that much because I had to power cycle it to get the router to be detected.
 
Comcast modems have an integrated DHCP server and will serve 30ish IPs. Getting the modem to serve more than one IP can be a little bit of a hassle, there's a sequence that has to be strictly followed to get the modem to recognize new mac addresses. I believe you'll need to disconnect the ethernet cables and power off all devices, reboot the modem, connect the modem to the switch then power on the switch, plug in the computers to the switch then power on the computers. This "should" work, but I've rarely had everything come up the first try, most often I have to reboot everything a couple times.
 
You must log in or register to reply here.

TRENDING THREADS

Back
Top