Starting this morning, our file server was giving very slow response time when the user tries to open a folder on the server. it takes anywhere from 45s to 65s to open the shared folder. But once the shared folder is opened, moving around within the shared folder is very fast (less than 2 sec).
When we ping, the DNS replies with an unknow IP address as the server i.e. server IP should be 10.0.0.2 but ping <server name> says it is 10.0.0.7. We do not know where the IP of 10.0.0.7 comes from. We have tried shutting down all routers, switches, servers in case the 10.0.0.7 was cached somewhere but apparently it did not help.
Any suggestions anyone?