Routing table query

PCDave

PCDave

PCDave

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10 Nov 2007
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809
Location
Southampton
Below is my routing table. I am having issues in that i can ping from the contoso dc to the router server and i can ping from the toys server to the router but I cannot ping from contoso to toys. Can anyone see where Im going wrong? all firewalls are turned off so this is not a factor

setup are all on virtual machines

3 machines all server 08

1 dc on the contoso domain (10.0.1.30) gateway 10.0.1.29

1 dc on the toys domain (10.0.0.111) gateway 10.0.0.110

1 server acting as a router with routing and remote access (lan routing) role installed. (have to do it this way due to lack of equipment) two network cards (10.0.1.29) & 10.0.0.110) Both domains are in seperate forests.

Unfortantly my routing skills are not brilliant. Can anyone see what static routes I need to add to get the contoso dc to ping the toys dc?

routing.png
 
Last edited:
What are the submet masks?! the default for a 10.0.0.0 network is 255.0.0.0. To be able to route betwene these networks the subnet masks must first be set to 255.255.255.0 on each network.

next either static routes need to be set up between those networks or use a dynamic routing protocol such as rip to discover the routes.
 
Static or dynamic routes should not need to be set up as a router (or in this case a server acting as a router) will know the directly connected networks, it is only if they are remote networks that a routing protocol would be needed.

The subnet mask is a likely issue as Gaz1988 mentioned. If you are using the default subnet mask for a 10. which is 255.0.0.0 then any communication from one device to another will think the destination is on the same network and thus should not need to use the default gateway. If you set up the subnet mask to 255.255.255.0 then the devices will see the destination as a different network and so send the packets via the default gateway.

If this is the case then its not an issue with the routing table but a configuration error of the IP/subnet mask on possibly all the interfaces.

So can you please confirm what you have set as the subnet masks on each interface on the devices.
 
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