Package: xen-utils-common Version: 4.0.0-1 Severity: important Tags: patch --- Please enter the report below this line. ---
when you use "hardware" virtual machine (with qemu) with xen configured for bridging the network script treates a tap interface and then /etc/xen/scripts/qemu-ifup adds it to the bridge. That would be ok but tap interfaces have a random mac address and the bridge always gets tha lowest mac address. considered dom0 uses this bridge, this can lead to a loss of network connection. The probability of getting this problem changes with the real mac address of the main interface. (No chance mine starts with "BC" ) A nice solution is to change the mac address of the tap interface to some very high and unlikely value before it is added to the bridge. Here is my version of /etc/xen/scripts/qemu-ifup It has some logs inside that can be removed but I feel it useful for checking. #!/bin/sh echo -c 'config qemu network with xen bridge for ' echo $* ####MY PATCH #echo "Current config of $1 " #ip link show $1 echo "Changing mac address of $1 to fe:ff:ff:ff:ff:ff" ip link set $1 addr fe:ff:ff:ff:ff:ff #echo "checking new config of $1 " #ip link show $1 ####END OF MYPATCH ifconfig $1 0.0.0.0 up brctl addif $2 $1 --- System information. --- Architecture: amd64 Kernel: Linux 2.6.32-5-xen-amd64 Debian Release: 6.0.4 500 stable security.debian.org 500 stable ftp.fr.debian.org 500 squeeze-backports mozilla.debian.net 100 squeeze-backports backports.debian.org --- Package information. --- Package's Depends field is empty. Package's Recommends field is empty. Package's Suggests field is empty. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
