I believe that it is a fairly simple issue. The 1841s have a route to the 2851 and from it to the Internet. The 2851 knows how to reach the 1841s on their serial interface because that is a connected network. But the 2851 has no routing knowledge of the Ethernet on the 1841 side. Either you need to run a dynamic routing protocol so that the 2851 will know these networks or you need a static route on the 2851 for each of the remote LAN networks.
The show ip route is from the 2851 router which has the route to the Internet. The route there appears to be right. The ip route 0.0.0.0 0.0.0.0 192.168.10.1 is on the 1841 router. And this route is correct since it point to the address of the serial on the 2851.
So I believe that the static routing is correct as given but is incomplete. In partucular if you look in the routing table given from the 2851 it is obvious that there are no routes for any of the LANs at the remote 1841s. That is the important issue which must be addressed.
He is doing NAT on the 1841 and hence, he doesn't need a route on the 2851 for the remote LAN subnet. He's natting the traffic to an RFC 1918 address on the 1841 and I'm not sure if the traffic is being natted again to a public address on the 2851. We need to look at the full config on the 2851 and topology info to make the correct determination as to what's causing the lack of the internet connectivity.
I did miss the NAT on the 1841. I saw the routing table on the 2851 had only connected subnets and the default route and thought that I had found the problem. I agree that we need to see the config from the 2851 and additional topology information.
Hi and thanks to everyone who's replied to my help request -
The topology is fairly straight.I have the 2851 w/(3)2prt vwic-2mft handling all the 1841's (5). Please see the 2851 config (shortened for brevity).I need to add that the ATT(ISP)router is the Internet with IP 188.8.131.52 /28
Thanks for the additional information. I believe that the issue is as Sundar suggested. The LAN addresses from the 1841s are translated into 192.168.10.x addresses coming into the 2851. But there is no translation of these addresses as they are forwarded to your next hop of 184.108.40.206. So you are forwarding them out but there is no route for the return traffic. They get to the provider or to the Internet and there is no routing there for 192.168.10.x. The solution would be to provide translation of these private addresses before they are forwarded to your provider.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
Im studying the 100-105 book by Odom and am currently on the topic of Port security. I purchased a used 2960 and I'm trying to follow a...
While deploying a number of 18xx/2802/3802 model access points (APs), which run AP-COS as their operating platform. It can be observed on some occasions that while many of their access points were able to join the fabric WLC withou...
I am going to design and build an LAN network under a tunnel underground with long distance between the switches.
I will have 2 Catalyst switches and 8 Industrial IE3000, and they will be connected with fiber.
For now I am planning on use Layer-2 s...