IP6_ADDR_7
SYS(fail, "ip -n %s -6 a add %s/128 dev veth7", ns2, IP6_ADDR_7);
SYS(fail, "ip -6 route add %s/128 dev veth5 via %s %s", IP6_ADDR_7, IP6_ADDR_6, vrf);
SYS(fail, "ip -6 route add %s/128 dev veth8", IP6_ADDR_7);
SYS(fail, "ip -6 route add %s/128 dev veth8 via %s", IP6_ADDR_5, IP6_ADDR_7);
SYS(fail, "ip -6 route add %s/128 dev veth8 via %s", IP6_ADDR_6, IP6_ADDR_7);