On 2011-09-02 15:59, Liang Guo wrote: > Hi, > > When I run kvm with following option: > > -net nic -net vde,sock=/var/run/vde2/vde3.ctl > > the guest OS's network work as expected, I can ping/ssh from/to host OS, > but when I run kvm with: > > -net nic -net user -net nic -net vde,sock=/var/run/vde2/vde3.ctl That's probably the classic mistake: You create one virtual LAN inside QEMU this way. Attached to this LAN are all four peers (two NICs, slirp and VDE). What you likely want are two backend/frontend pairs: -net nic,netdev=net1 -net user,id=net1 \ -net nic,netdev=net2 -net vde,sock=/var/run/vde2/vde3.ctl,id=net2 Jan -- Siemens AG, Corporate Technology, CT T DE IT 1 Corporate Competence Center Embedded Linux -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html