Following directions from: lxc for Slackware 14.2. I haven’t tested on Slackware 15 yet. You will have to set this up while running as root.

1. Create the file '/etc/default/lxc-net' and add the line USE_LXC_BRIDGE="true" to it.

2. Create the directory '/var/lib/misc'

3. Start the service: # /usr/libexec/lxc/lxc-net start

4. Create a config file:

# cat >slac-xlc.con «“EOF” lxc.network.type = veth lxc.network.flags = up lxc.network.link = lxcbr0 EOF