Is my network set up is correct?

[Jalvin]

Im not good at computer LAN networking so i need help!

my problem is when i start my router and modem sometimes i cannot connect to the internet.
so i need to restart it, or wait for 15 min then restart then it will connect and it will all goes fine.

my LAN setting is 80-90% manual setup, i use static IP's on my computers (because if I use DHCP i've always got a problem on windows homegroup)
Please kindly check if I set my IP incorrect:

So this is my IPv4 set up on my 3 computers:
IP: 192.169.0.102 to 104
Subnet: 255.255.255.0
def. gateway: 192.168.0.1
I use google DNS which is: 8.8.0.0 with alternate: 8.8.8.8

This is my Router Network Setting:
IP address: 192.168.0.1
subnet: 255.255.255.0
wan mode: dhcp
MTU: 1500
DHCP pool address:192.168.0.100 to 254 lease time: 1day
DNS is always vary from time to time but the current is: 121.1.3.88
then alternate is I set it on: 8.8.8.8

My Modem Network Setting: (i didnt change any settings)
IP address: 192.168.15.1
DHCP Mode: Server
Start IP: 192.168.15.2 to 192.168.15.254 lease time: 1440 min
DNS: Auto

I notice if my problem occur (in second paragraph) I cant ping my modem,
or I cant browse the configuration setting of my modem.

Do i have mistake on IP configuration?

Please Help!

All my computers is running Windows 7 Ultimate
my router model: http://

 

[Guest]

Your subnet mask of 255.255.255.0 means that only the final number in an IP address can be different- the 192.168.0 part must be the same on *all* devices.

Changing all of your IPs to start 192.168.0 should be a quick win.

However, given your current understanding of networking I'd recommend switching everything to DHCP and resolving any issues with Windows.

 

[BuddhaSkoota]

So this is my IPv4 set up on my 3 computers:
IP: 192.169.0.102 to 104
I use google DNS which is: 8.8.0.0 with alternate: 8.8.8.8

This is my Router Network Setting:
IP address: 192.168.0.1
DHCP pool address:192.168.0.100 to 254 lease time: 1day
DNS is always vary from time to time but the current is: 121.1.3.88
then alternate is I set it on: 8.8.8.8

My Modem Network Setting: (i didnt change any settings)
IP address: 192.168.15.1
DHCP Mode: Server
Start IP: 192.168.15.2 to 192.168.15.254 lease time: 1440 min
DNS: Auto

The first problem I see is that you have the static IPs on your computers within the DHCP scope of your router. You must set them outside of 192.168.0.100-254 (i.e. 192.168.0.1-99).

I believe Google DNS is actually 8.8.4.4 and 8.8.8.8. I haven't seen the 8.8.0.0 address before, but I could be mistaken. Your PCs may not be seeing the primary DNS server.

You modem actually appears to be a modem/router device since it assigns private IPs. This may cause NAT problems. You may want to find if this device can be placed in bridge mode (public IP gets assigned to your router only device).

 

[Jalvin]

You can check the link http://www.tomshardware.com/forum/41067-42-setting-static-addresses which is a similar scenario.

nice, thanks!

 

[Jalvin]

So this is my IPv4 set up on my 3 computers:
IP: 192.169.0.102 to 104
I use google DNS which is: 8.8.0.0 with alternate: 8.8.8.8

This is my Router Network Setting:
IP address: 192.168.0.1
DHCP pool address:192.168.0.100 to 254 lease time: 1day
DNS is always vary from time to time but the current is: 121.1.3.88
then alternate is I set it on: 8.8.8.8

My Modem Network Setting: (i didnt change any settings)
IP address: 192.168.15.1
DHCP Mode: Server
Start IP: 192.168.15.2 to 192.168.15.254 lease time: 1440 min
DNS: Auto

The first problem I see is that you have the static IPs on your computers within the DHCP scope of your router. You must set them outside of 192.168.0.100-254 (i.e. 192.168.0.1-99).

I believe Google DNS is actually 8.8.4.4 and 8.8.8.8. I haven't seen the 8.8.0.0 address before, but I could be mistaken. Your PCs may not be seeing the primary DNS server.

You modem actually appears to be a modem/router device since it assigns private IPs. This may cause NAT problems. You may want to find if this device can be placed in bridge mode (public IP gets assigned to your router only device).

ok thanks,