We have a Dell Poweredge SBS 2003 server, which is our DC, file, print and DNS server (not exchange).
Recently, logins have been pretty slow. I know that this is down to DNS.
This server has two adapters. One is 192.168.0.100 and one 192.168.0.101. We use 0.100 for everything and 0.101 is not reachable (can't browse/ping) and seems to be useless however everything stops working when we disable it!
On DNS Management, I see a folder for the server, where there are two A records - one being 0.100 and one 0.101. I constantly delete 0.101 and then logins are quick but the server readds it at least every hour.
I don't want to sort out the adapter mess because the server will be replaced soon, but we need to make the logins quicker.
I also can't have the DNS Server stop updating (because client PCs are on DHCP) and don't want to use the HOSTS file (not convenient, machines wiped often etc)