From my network i cannot connect to other network subnet?

My office network consist of multimple networks.like 192.168.1.0, 192.168.2.0, 192.168.3.0 and also Internet. From last few days some of my netwok computers(win-xp,win-2000 server) are having problem to connetct with computers to other network and Internet. But same computer can connetct with other computers on the same network.


My routers are working fine and no firewall is configure for the effective computers. TCP/IP configation of the affected computers is ok with proper default getway.


My anivirus software avg, escan is updated and fail to find any virus,trojan or malware.


So please help me to solve this problem.





Regards


shourov

From my network i cannot connect to other network subnet?
How are these different networks connected to one another? Are they actual physical subnets connected by routers or are they VLANs within a switch?


This sounds like a classic routing problem. Do the problem computers show that they have the proper default gateway? If so, reboot whatever physical hardware connects these networks, whether it's a layer 3 switch or router.


If you know how to interpret the results, you could run a tracert or pathping. They would tell you where the routing is breaking down.





EDIT: So, when you tracert from the problem computers, what do you get?
Reply:Have you done a tracert from one of the effected pc's to see where the link is broken. If this is going across a vpn maybe the vpn is down. It could be just your router needs to be rebooted, or if you are using automatic routing protocols like ospf or something maybe it has gotten turned off on one of it's neighbors. if you do a tracert that should give you a starting point to see at least where your packets "are" making it.