|OK - here goes|
Two subnets 192.168.0.0 and 192.168.20.0
The .0.0 subnet is based in one building and the 20.0 in another. They're connected by a dedicated 10mb line. Routing is done (for now at least) using RRAS on a 2003 server located in the building with the 20.0 subnet. All was working fine until about 10:15 yesterday when the RRAS server suddenly stopped letting workstations on the 20.0 subnet talk to the email server on 0.0. Tracert stops everything at the RRAS server on its 20.0 IP.
The RRAS server itself can ping everything on both subnets. The only thing on the 0.0 subnet that can be pinged from a 20.0 address is the second lan card on the RRAS server which is on the 0.0 subnet.
Hope that's not too much to take in.
No idea why it stopped working as no changes were being made at the time.
What I have done to resolve this:
Restarted the RRAS service
Restarted the server running the RRAS service
Rebooted an affected workstation - all to no avail
My knowledge of routing stops there and the person who knows is on holiday and not contactable.
I know the link is up because the RRAS server can ping across it plus I have an IP phone that goes over the link and that still works (bizzarely the phone is on the 20.0 subnet so I may be wrong about what link it is using).
I know the email server on the 0.0 subnet is working because we can access it over OWA
So - any ideas where I go from here?
Treat me as a routing novice (although I've been working with PCs for twenty years)
Thanks in advance