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Internet access between two subnets

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by johnmaambo

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Hi All,
I have this connection problem which i would to be happy to resolve.I have been asked to provide internet access for my mates whose computers are on the other subnet.Our network has two subnets,192.168.1.0 and 192.168.2.0.We have a 4 port Broadband modem Router that connects to the internet.Our pcs are all connected to a hub which is connected to one of the ports on the Broadband Router.The IP address of the router is 192.168.1.1.The Router is DHCP enabled.All clients on the 192.168.1.0 subnet recieve thier IP addresses from this Router.There is a second router,a Linksys WRT54G wireless Router which is connected to one of the ethernet Ports on Broadband Router.This Linksys is configured with a static LAN IP address of 192.168.2.1 for the subnet(192.168.2.0)network.Users on the 192.168.2.0 are connected to a hub which is connected to this Router.User can access resources on the 192.168.1.0 subnet but not able to connect to the internet.I can ping the Broadband router from any Pc in the 192.168.2.0 subnet but can not access the internet facility.Can someone please help me sort this configuration nightmare without changing the Subnets.
Thanks.
Jm.

3 replies

by rophitvarun2000

hi
the router is dhcp enabled so the router must be throwing ip add to computers in both the networks. Now u say that you have configured the network (192.168.2.0) with static ip and now this combination will not work bcoz for this network to work with router the network id of the router and any network should be the same.After u congigure the ip add oF the computers in second network on automatic mode the things will work fine.hope u got watever i wanna say!!!!!

by johnmaambo

Hi,
Iam not quite sure i understand what you are saying,but this is what i think you mean to say;I let the Broadband Router Issue IP addresses to my 192.168.2.0 subnet.To start with,i have two routers,one that manages subnet 192.168.1.0 and also connects to the internet.The second Router which manages the 192.168.2.0 subnet.I have not configured the second router to DHCP.I guess i could,but it would still be the same.I tried to increase the DHCP range of for The Broadband router to include the 192.168.2.0 subnet but it did not accept this,hence got stuck here.I hope you understand what i have done.
Jm.

by jrhem

So, it sounds like (and correct me if I get this wrong since it is pertinent to me giving a correct answer) the WRT54G (I have one of these btw) has a subnet of 192.168.2.0 on the LAN side and on the WAN side of the WRT54G it is DHCP and getting that IP from the Broadband Router making the WAN subnet for it 192.168.1.0. Since the 2 subnets talk fine, this tells us that your WRT45G is routing fine locally, but not routing Internet IP traffic. I think you should check your DNS servers (the primary and secondary used by your ISP) Not sure what they are? Check your Broadband Router's WAN IP settings (provided by the ISP). The 2 DNS servers should be listed. Make sure that both the BBRouter and the WRT54G's internal DHCP server has these DNS server IPs added and is pushing them out to it's clients. Check a client on the 192.168.2.0 subnet to see if they are getting the DNS server IPs. Can they ping them? Can they even ping your BBRouter (the WAN IP or ISP side)?
If it were me, I would make the WAN IP of the WRT54G static (low number like 192.168.1.10) and set the BBRouter's DHCP Pool to start higher than that number. Let me know if this helps any. Just rememberr the basics of troubleshooting. Eliminate one issue at a time and the answer will come.

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