#!/bin/sh ip netns del cs_client >/dev/null 2>&1 ip link del veth0 >/dev/null 2>&1 ip netns add cs_client ip link add type veth ip link set veth1 name eth1 netns cs_client export cs_client_if1=eth1 export cs_server_if1=veth0 export cs_client_ip1=2001:db8:ffff::1 export cs_server_ip1=2001:db8:ffff::2 ip netns exec cs_client ip link set $cs_client_if1 up ip link set $cs_server_if1 up ip netns exec cs_client ip -6 addr add $cs_client_ip1/64 dev $cs_client_if1 ip -6 addr add $cs_server_ip1/64 dev $cs_server_if1 ip netns exec cs_client ifconfig lo up ifconfig lo up