HI all Centos 7, 3.10.0-123.6.3.el7.x86_64 libvirt 1.27, libvirt 1.2.8 builded from source with ./configure --prefix=/usr make && make install LXC with direct network failed to start: Sep 16 19:19:38 node01 kernel: device br502 entered promiscuous mode Sep 16 19:19:39 node01 kernel: device br502 left promiscuous mode Sep 16 19:19:39 node01 avahi-daemon[1532]: Withdrawing workstation service for macvlan0. Sep 16 19:19:39 node01 kernel: XFS (dm-16): Mounting Filesystem Sep 16 19:19:39 node01 kernel: XFS (dm-16): Ending clean mount Sep 16 19:19:39 node01 kernel: libvirt_lxc[4904]: segfault at 0 ip 00007ffe3cbf0df6 sp 00007ffe3fa03c98 error 4 in libc-2.17.so[7ffe3cabf000+1b6000] Sep 16 19:19:39 node01 abrt-hook-ccpp: Saved core dump of pid 1 (/usr/lib/systemd/systemd) to /var/tmp/abrt/ccpp-2014-09-16-19:19:39-1 (716800 bytes) Sep 16 19:19:39 node01 journal: Cannot recv data: Connection reset by peer Sep 16 19:19:39 node01 journal: internal error: guest failed to start: In libvirt-1.2.6 work fine. LXC config: <domain type='lxc' id='5933'> <name>ce7-t1</name> <uuid>f80ad54d-6560-4bd0-aa6d-df3e29888914</uuid> <memory unit='KiB'>2097152</memory> <currentMemory unit='KiB'>2097152</currentMemory> <memtune> <hard_limit unit='KiB'>2097152</hard_limit> <soft_limit unit='KiB'>2097152</soft_limit> <swap_hard_limit unit='KiB'>3145728</swap_hard_limit> </memtune> <vcpu placement='static'>2</vcpu> <resource> <partition>/machine</partition> </resource> <os> <type arch='x86_64'>exe</type> <init>/sbin/init</init> </os> <features> <privnet/> </features> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/libexec/libvirt_lxc</emulator> <filesystem type='block' accessmode='passthrough'> <source dev='/dev/data/ce7-t1'/> <target dir='/'/> </filesystem> <filesystem type='ram' accessmode='passthrough'> <source usage='524288' units='KiB'/> <target dir='/dev/shm'/> </filesystem> <interface type='direct'> <mac address='02:00:00:58:d8:15'/> <source dev='br502' mode='bridge'/> </interface> <console type='pty' tty='/dev/pts/2'> <source path='/dev/pts/2'/> <target type='lxc' port='0'/> <alias name='console0'/> </console> </devices> <seclabel type='none'/> </domain> Where br502 attached to vlan interface : #brctl show br502 bridge name bridge id STP enabled interfaces br502 8000.002590e2da34 no eno1.502 In 1.2.7 and 1.2.8 lxc with nat network work fine. b.r. Maxim Kozin