Guilherme Buonfiglio schrieb: > Hi, > > I have a host running Ubuntu 7.04 and VirtualBox 1.4.0. There are 4 > guests, 2 Ubuntu 7.04, 1 CentOS 3.8 and 1 Windows-XP. > Sometimes one of the guests stops responding to the network. If I > restart the guest the network still does not work, but if I remove the > tap from the bridge, send a down and up to the tap interface and re-add > it to the bridge, the guest comes back to the network, even if I do > nothing inside it or on VirtualBox itself. > > It's happening every day or two randomly and with different guests. > Weird enough I have another host with same setup but 9 guests and I > never had any problems like this. Both hosts have pre-defined tap > interfaces and each guest is attached to a specific individual tap. > > Any idea? I don't know where to look for more information as no error is > logged... :-(
The reason usually is somewhere in the bridge/tap code in the kernel. Which we have no control over. The usual problem is that ARP packets (used to figure out the translation between IP addresses and ethernet addresses) get lost in the bridge. As a consequence no one can communicate with the VM or other member of the bridge. And usually it is not necessary to delete the interface from the bridge to "cure" the problem. ifconfig tapX down; ifconfig tapX up suffices. This is generally not a VirtualBox problem, and thus cannot show up in the logs. -- Dr. Klaus Espenlaub innotek GmbH, http://www.innotek.de _______________________________________________ vbox-users mailing list [email protected] http://vbox.innotek.de/mailman/listinfo/vbox-users
