[libvirt-users] Graphical framebuffers confuse, XML format about spice

Hello, i want to start a guest OS in the server, and use spice to achieve graphical interaction with the guest OS. But when i config the XML file, i was confuse by spice . The graphic node is : <graphics type='spice' port='5990' ><listen type='address' address='127.0.0.1'/></graphics> but is has such error as below : libvir: QEMU error : internal error process exited while connecting to monitor: qemu-spice: -spice port=5990,addr=127.0.0.1,disable-ticketing: Invalid parameter 'addr' parse error: port=5990,addr=127.0.0.1,disable-ticketing What is the meaning of <listen type='address' address='*****'/>, If the localhost IP is A and the spice-server IP is B. what should i set the listen type ? to start the Domain and to achieve graphical interaction with the guest OS.