Netwok Troubleshooting

  DoctorButcher 00:23 27 Jan 2006
Locked

I'm troubleshooting a network...

Friend of mine on BY broadband...

Cable modem is allocated IP address and forwarded to router (DNS, WINS, DHCP all set to 192.168.1.25-254) - router IP 192.168.1.1

Devices on network are PC1 (XP Pro 192.168.1.10), PC2 (XP Pro 192.168.1.11), XBox (DHCP Enabled), 2nd Router for VoIP (192.168.1.2) which allocates secondary IP to PC3 (W2KPro 192.168.2.10)

All devices can see out to the Internet but cannot see each other... any idea why?

Ta!

  Press Man 01:10 27 Jan 2006

Check that all devices IP addresses are in the "trusted zone" in your firewall. Also try "pinging" each device.

  mgmcc 09:46 27 Jan 2006

PCs 1 & 2 should "see" each other because they are in the same 192.168.1.x subnet. PC3 is in the separate 192.168.2.x subnet and won't see, or be seen by, PCs 1 & 2 because the Subnet Mask of 255.255.255.0 "masks" the two subnets to keep them separate.

You *MIGHT* get the two subnets to communicate if you are able to change the Subnet Mask *throughout* the network to 255.255.0.0

This will be dependent on the routers allowing this change in their LAN Subnet Mask in addition to using fixed IP addressing for all network adapters.

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