Hello, I need your help please! Excuse my bad English. Since we installed Xen have experiencing random network disconnections in our guests with any reason, the ping dont response. I solve this issue, I connect to VNC Server in the host, open the virt-manager, all VMs is running, next I open the disconnected guest and then click in the black window, after that the guest response ping, it''s like the VMs enter Standby mode or hybernation. Details: Hardware: HP G7, 2 CPUs AMD Opetron 6136 de 64 bits y 8 nucleos RAM: 32 GB Host: Centos 5.7 (xen-3.0.3-132.el5_7.2 - 2.6.18-274.18.1.el5xen). VMs: 4 HVM debian 6.01, 2 CPUs and 4 Gb Ram. I really appreciate your help. Thanks. Julio