Windows doesnt work With different IPv4 Gateway

Hi i have Windows 7 ultimate 64bit and XP Pro 32bit, and here is my issue: i have a huge network and i have to set my IPs
IPv4:
IP Adress 10.100.150.200
Subnet M: 255.255.128.0
Gateway: 10.100.20.1

DNS: 10.100.0.3

This settings work on all XP OS but doesnt work with all Windows 7. It works for 5-10 min then it says no connection. After set IP it works then doesnt work. If i ping 10.100.20.1 -t it pings as much as i want until i stop and if i restart ping it doesnt work, while first ping i can access to internet after stopping the ping no internet also, That win 7s works with normal ip configurations like: ip:192.168.0.10 gateway: 192.168.0.1

So any1 have any idea what it could be? Does windows 7 have problem with different gateway problem? or is it a bug?

Thanks for any reply..

emiks said:

Hi i have Windows 7 ultimate 64bit and XP Pro 32bit, and here is my issue: i have a huge network and i have to set my IPs
IPv4:
IP Adress 10.100.150.200
Subnet M: 255.255.128.0
Gateway: 10.100.20.1

DNS: 10.100.0.3

This settings work on all XP OS but doesnt work with all Windows 7. It works for 5-10 min then it says no connection. After set IP it works then doesnt work. If i ping 10.100.20.1 -t it pings as much as i want until i stop and if i restart ping it doesnt work, while first ping i can access to internet after stopping the ping no internet also, That win 7s works with normal ip configurations like: ip:192.168.0.10 gateway: 192.168.0.1

So any1 have any idea what it could be? Does windows 7 have problem with different gateway problem? or is it a bug?

Thanks for any reply..

You haven't mentioned the type of router you are using for this connection but it may help to update the router's firmware to the newest version if possible.

First thanks for your reply,
If it is problem with Routers why then XP and all other devices (Ubuntu, Linux, Smart phones, Samsung Tabs) work perfectly instead of Windows 7? Aren't they using same network packaging system?
and about updating firmware is kinda hard for me because i have about 30-40 routers switches.. and i dont think its about firmware problem because all devices work perfectly according to Windows 7.

emiks said:

First thanks for your reply,
If it is problem with Routers why then XP and all other devices (Ubuntu, Linux, Smart phones, Samsung Tabs) work perfectly instead of Windows 7? Aren't they using same network packaging system?
and about updating firmware is kinda hard for me because i have about 30-40 routers switches.. and i dont think its about firmware problem because all devices work perfectly according to Windows 7.

You should only have one router for one network, the number of switches does not matter.

If you can post a screen shot of your ipconfig/all from the Windows 7 machine it would be most helpful.