setup_net_namespace.sh

#!/bin/sh

ns=my-namespace
in_ns="ip netns exec $ns"

# set up namespace
ip netns add $ns
$in_ns ip link set dev lo up

# add veth interfaces and move one to the namespace
ip link add veth0 type veth peer name veth1
ip link set veth1 netns $ns

# add ip addresses to the interfaces
ip addr add 10.0.0.1/24 dev veth0
$in_ns ip addr add 10.0.0.2/24 dev veth1

# bring up interfaces
ip link set dev veth0 up
$in_ns ip link set dev veth1 up

# add a bridge for the lxc container in the namespace
$in_ns brctl addbr br-lxc
$in_ns brctl addif br-lxc veth1