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Windows 7: Win7 Won't Take Assigned DHCP IP


01 May 2010   #1

Windows 7 Pro
 
 
Win7 Won't Take Assigned DHCP IP

On my router, I have DHCP assign IPs to the various computers/devices on my network. For example, a laptop is 192.168.1.103, and my server is 192.168.1.102.

I've tried assigning 192.168.1.101 to my Windows 7 box, but it keeps coming back with 192.168.1.20. I recently reinstalled Windows7 (for a separate issue), and I'm still getting x.x.x.20.

The router assigns this IP via the NIC's MAC ADDRESS. When I check to see what devices are attatched to my router, my router shows the Windows 7 PC with the .20 IP.

All other nodes (Game consoles, Linux, Mac, WinXP) seem to accept the IP assigned by the router. Why won't my Windows 7 box?

I have a Netgear WNDR3700, and the Windows 7 box is hooked directly to the router.


My System SpecsSystem Spec
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01 May 2010   #2

 
 

I dont understand why you are trying to manually assign an IP using DHCP?
My System SpecsSystem Spec
01 May 2010   #3

Windows7 Ultimate 64bit
 
 

Remove the IP reservation. Once you done that, make sure that Windows 7 box gets an IP from your DHCP server, then you can redo the reservation progess. You said that the .20 is reserved to Windows 7's box MAC address, you need to delete this reservation before doing everything else...

zzz2496
My System SpecsSystem Spec
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01 May 2010   #4

Windows7 Ultimate 64bit
 
 

Quote   Quote: Originally Posted by Pusspa View Post
I dont understand why you are trying to manually assign an IP using DHCP?
It's a "static" DHCP assignment, you set your computer to auto obtain IP address, and set your router to always give a static IP address to certain computers. So for example, you set so that "laptop" will always receive 192.168.1.99 in the router, and let the "laptop" automatically ask for IP address. This will simplify people that moves from network to network (DHCP enabled), but needs the certainty of having a "static" IP address.

zzz2496
My System SpecsSystem Spec
01 May 2010   #5

Windows 7 Ultimate x64
 
 

ZZZ2496>>
Just your opinion.

I am fully aware of both static and dynamic IP relationships but what is the main purpose of "Static" DHCP assignment?
My System SpecsSystem Spec
01 May 2010   #6

Windows 7 Enterprise (x64); Windows Server 2008 R2 (x64)
 
 

Quote   Quote: Originally Posted by acurasd View Post
ZZZ2496>>
Just your opinion.

I am fully aware of both static and dynamic IP relationships but what is the main purpose of "Static" DHCP assignment?

Assigned addresses by DHCP are great for printers, because they need to be the same (static) address all the time.

Edit: Security is another good reason. You can have DHCP on but only give addresses to known MAC addresses.
My System SpecsSystem Spec
01 May 2010   #7

Windows7 Ultimate 64bit
 
 

Quote   Quote: Originally Posted by acurasd View Post
ZZZ2496>>
Just your opinion.

I am fully aware of both static and dynamic IP relationships but what is the main purpose of "Static" DHCP assignment?
Let's say I have a laptop that's also a mobile workstation. When I'm at home, I need to be able to access my laptop's web server from, say a development workstation. I need that laptop to have a static IP address at home, but use DHCP while I'm out at a cafe or at the office or at my client's. The simple thing will be to set a Static DHCP assignment to my laptop on my DHCP server, so that I can always enable auto obtain IP address, yet still have a static IP address at home (and dynamic at everywhere else).

zzz2496
My System SpecsSystem Spec
02 May 2010   #8

Windows 7 Ultimate x64
 
 

I am a little tipsy here. People in wilmington, nc can mix some good drinks... but the only good thing for static dhcps are for mobile laptops that move around alot, Not so much for printers because those usually keep a static ip cause those usually stay stationary.

so i guess that makes sense... wasn't thinking that at the time.

I read alot of people take their laptops to like 20 different sites and they are complaining becuase they have to change their IPs 20 different times, the static dynamic ips would fix that, becuase it would be based on their MAC addresses
My System SpecsSystem Spec
02 May 2010   #9

Windows 7 Enterprise (x64); Windows Server 2008 R2 (x64)
 
 

Quote   Quote: Originally Posted by acurasd View Post
I am a little tipsy here. People in wilmington, nc can mix some good drinks... but the only good thing for static dhcps are for mobile laptops that move around alot, Not so much for printers because those usually keep a static ip cause those usually stay stationary.
Ahh, but you are only thinking of a home user, coffee shop, or maybe a small business. Let's think about printers on a large scale or enterprise. Static DHCP for a printer make more sense. If someone on another subnet takes a printer to their office and tries to use it, it will not work because the printer will never get an address. They are forced to call the help desk. Now you know a printer had been removed without authorization. Plus maybe you have a network where you don't want someone bringing in their home laptop and using your network Static DHCP will not assign them an address so the network does not work for them. (Note: I know there are ways to get around this but for the average user this stops them).
My System SpecsSystem Spec
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 Win7 Won't Take Assigned DHCP IP




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