Before installing MPLS, we in the branch office used to rely on ASA site-to-site VPN to access HQ network file resources. The branch has its own LAN 192.168.1.x while the HQ 10.10.10.x. The ASA's IP 192.168.1.14 used to be the only default gateway. Now just this morning we installed the MPLS router and its IP 192.168.1.3 becomes the new default gateway with the following routing:
All traffic to 10.10.10.x will be routed via 192.168.1.3
All others (internet) will be routed to ASA 192.168.1.14
Now since I was not able to change the default gateway in time for all clients in the Branch from .14 to .3 and as the result the clients who still used .14 as the default gateway became not able to access the HQ's network resources -- they cannot open network shared file folders even they can ping the server without problem.
This is so confusing... why we can ping the server but cannot open its folder? Just because using the different gateway. Don't forget the site-to-site VPN via the ASA is still functional. Why not working? Please help me understand? Did I miss anything? Thanks.