IP4_ADDR_7
SYS(fail, "ip -n %s a add %s/24 dev veth7", ns2, IP4_ADDR_7);
SYS(fail, "ip route add %s/32 dev veth5 via %s %s", IP4_ADDR_7, IP4_ADDR_6, vrf);
SYS(fail, "ip route add %s/32 dev veth8", IP4_ADDR_7);
SYS(fail, "ip route add %s/32 dev veth8 via %s", IP4_ADDR_5, IP4_ADDR_7);
SYS(fail, "ip route add %s/32 dev veth8 via %s", IP4_ADDR_6, IP4_ADDR_7);