CMe3000 is a gateway that translates wired mbus or mbus IR to mbus over TCP/IP. You can instruct your CMe3100 to read meters via the IP address that you have provided to your CMe3000.
Information about how to administrate the CMe3000 could be read here.
In the CMe3100 enter meters ->mbus settings
Now add a new interface to search.
Press Add New, and enter your CMe3000 IP and port. Normally the port is set to 10001.
Now, enter meters -> search for meters. -> Change to advanced search mode.
Chose your method of search (addressingmode, baudrate etc) Then mark your interfaces to search, then press search.
Now meters connected to your CMe3000 will be added to your meterlist.