CME on GNS3 3725 router Basic

    This is very simple and basic setup for soft IP phone (software-based phone installed on PC);

    You need 3725 IOS, MS Loopback, and Cisco IP Communicator (it might work with other software-based phones)


    Assign Cisco IP Communicator phone to MS Loopback and set tftp server to IP of router interface connected to MS Loopback;

    In my case: IP of Fa0/0 is and IP of MS loopback is (no default gateway) all in


    Try it and let me know if you have problems;


    Make sure your router has at least 256 MB RAM !