Hi, I've created a bridge using 2 interfaces and have a lot of messages as follows: nov 12 15:30:22 localhost kernel: br0: received packet on enp0s3 with own address as source address nov 12 15:30:22 localhost kernel: br0: received packet on enp0s3 with own address as source address And the operating systems is extremely slow Interfaces files : [root at localhost ~]# cat /etc/sysconfig/network-scripts/ifcfg-* DEVICE=br0 TYPE=Bridge BOOTPROTO=dhcp ONBOOT=yes #STP=on #DELAY=0 NM_CONTROLLED=no DEVICE=enp0s3 #HWADDR=08:00:27:AB:1D:E6 BOOTPROTO=none ONBOOT=yes NM_CONTROLLED=no BRIDGE=br0 DEVICE=enp0s8 HWADDR=08:00:27:A3:98:E6 BOOTPROTO=none ONBOOT=yes NM_CONTROLLED=no BRIDGE=br0 DEVICE=lo TYPE=loopback IPADDR=127.0.0.1 NETMASK=255.0.0.0 NETWORK=127.0.0.0 # If you're having problems with gated making 127.0.0.0/8 a martian, # you can change this to something else (255.255.255.255, for example) BROADCAST=127.255.255.255 ONBOOT=yes NAME=loopback I've disabled NetworkManager, but problem persists. System is: [root at localhost ~]# uname -a Linux localhost 3.10.0-123.el7.x86_64 #1 SMP Mon Jun 30 12:09:22 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux And is virtualized on VirtualBox Please could you help me to fix it? Thanks in advance! -- -- Sergio Belkin LPIC-2 Certified - http://www.lpi.org