Mavericks favours SMBv2 connections for compatibility with other operating systems, such as Wndows. However, other protocols including SMB1, AFP, FTP, and NFS are still supported and the system should resort to using them if a connection demands it. However, if a device supports both SMB protocols, then OS X may resort to version 2 for the connection, even if there's a conflict. This can be seen as an error or timeout. If you can't connect to a SMB device (like a NAS box) try forcing an SMBv1 connection: cifs://server address.