Windows 7: DHCP problem on 7

kane77 · 24 Feb 2010

Hi,
a friend brought me his laptot HP Pavilion dv6500 (6525em to be precise) with Windows 7 installed. There is one problem, DHCP does not work on ethernet port. When I switch it to DHCP it just does not assign me IP (when I run ipconfig /renew it times out), although on my home computer in Vista it works without any problems.

Also if I set IP manually on the laptop (correct IP for subnet I use) it works OK. Can anyone help me to diagnose and fix it?

brady · 24 Feb 2010

If the machine had been used previously on another home network, you might want to reset the modem and router to refresh it's dhcp before powering the laptop back on.

kane77 · 24 Feb 2010

Quote: Originally Posted by brady

If the machine had been used previously on another home network, you might want to reset the modem and router to refresh it's dhcp before powering the laptop back on.

I just restarted both computer and my router, no dice.. This is not supported model of pavilions, so do you think this could be caused by wrong/incompatible driver? It does not seem so to me, since the networking is working, it's just the DHCP that doesn't. And I checked the Services and the DHCP is listed as running and I also tried restarting it, but still nothing..

zap · 24 Feb 2010

Your Internet Service Provider may be using a static as opposed to dynamic (DHCP) server. Call you ISP and ask.

kane77 · 24 Feb 2010

Quote: Originally Posted by zap

Your Internet Service Provider may be using a static as opposed to dynamic (DHCP) server. Call you ISP and ask.

nope, I configured the router, and it is definitely using DHCP (it works on my computers)..

brady · 24 Feb 2010

router has little or nothing to do with this problem, normally. It's more of a modem issue.

Try this in order:
1: power off your modem completely (power cord = take out of the back of the modem)
2: power off your router (power cord = take it out)
3: power OFF your computer(s) (all of them)
4: plug ethernet cable into your laptop *But keep it powered off for now*
5: Plug the modem back in
5a: wait for modem lights to cycle through completely (give it 4 minutes to be safe)
6: Plug Router power back in
6a: wait for router lights to cycle through and maintain connectivity
7: Power on the problematic laptop *make sure you only have 1 adapter broadcasting for an IP address*
8: check ip address

kane77 · 24 Feb 2010

okay, tried all and still no connection.. tried disabling ipv6 and it did not fix it. I still believe the problem is not within the network (since friend brought it to me because it did not work in his network - also DHCP), but rather driver/windows/laptop issue, any other ideas how to find out what is wrong.

What I noticed, that the ipconfig /renew fails (time out), but the interface has ip address of 169.254.166.27/16 and this is not what my network looks like (mine is 192.168.100.0/24)

brady · 24 Feb 2010

the 169* is apipa, it's the automatic ip that your machine assigns to itself when it has no response from dhcp.

Can you do a ipconfig /all and paste it into a reply?

ickymay · 24 Feb 2010

Quote: Originally Posted by kane77

Hi,
a friend brought me his laptot HP Pavilion dv6500 (6525em to be precise) with Windows 7 installed. There is one problem, DHCP does not work on ethernet port. When I switch it to DHCP it just does not assign me IP (when I run ipconfig /renew it times out), although on my home computer in Vista it works without any problems.

Also if I set IP manually on the laptop (correct IP for subnet I use) it works OK. Can anyone help me to diagnose and fix it?

have you tried looking for updates on NIC drivers or alternatives or rolling back ?

kane77 · 25 Feb 2010

Quote: Originally Posted by brady

the 169* is apipa, it's the automatic ip that your machine assigns to itself when it has no response from dhcp.

Can you do a ipconfig /all and paste it into a reply?

Code:

Microsoft Windows [Version 6.1.7600]
C:\Windows\system32>ipconfig /all
Windows IP Configuration
   Host Name . . . . . . . . . . . . : Tomas-PC
   Primary Dns Suffix  . . . . . . . :
   Node Type . . . . . . . . . . . . : Hybrid
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No
Ethernet adapter Lokálne pripojenie:
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : NVIDIA nForce 10/100 Mbps Ethernet
   Physical Address. . . . . . . . . : 00-00-00-00-00-00
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   Autoconfiguration IPv4 Address. . : 169.254.166.27(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.0.0
   Default Gateway . . . . . . . . . :
   NetBIOS over Tcpip. . . . . . . . : Enabled
Wireless LAN adapter Pripojenie bezdrôtovej siete:
   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Broadcom 802.11g - sieťový adaptér
   Physical Address. . . . . . . . . : 00-1A-73-6D-D5-1C
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
Tunnel adapter isatap.{897DA272-40D0-4DF1-AC4F-2EDEAC522C36}:
   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Microsoft ISATAP Adapter
   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
Tunnel adapter Teredo Tunneling Pseudo-Interface:
   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
Tunnel adapter isatap.{E0BF12EF-277C-4439-AD7C-4DA8206E2E53}:
   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Microsoft ISATAP Adapter #2
   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
C:\Windows\system32>

Windows 7: DHCP problem on 7

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