def METHOD_NAME(mod):
    tgen = Topogen(build_topo, mod.__name__)
    tgen.start_topology()
    pe1 = tgen.gears["pe1"]
    rr1 = tgen.gears["rr1"]
    pe1.run("ip link add Customer type vrf table 1001")
    pe1.run("ip link set up dev Customer")
    pe1.run("ip link set pe1-eth0 master Customer")
    pe1.run("ip link add Service type vrf table 1002")
    pe1.run("ip link set up dev Service")
    pe1.run("ip link set pe1-eth1 master Service")
    pe1.run("ip link set pe1-eth3 master Customer")
    pe1.run("sysctl -w net.mpls.conf.pe1-eth2.input=1")
    rr1.run("sysctl -w net.mpls.conf.rr1-eth0.input=1")
    router_list = tgen.routers()
    for i, (rname, router) in enumerate(router_list.items(), 1):
        router.load_config(
            TopoRouter.RD_ZEBRA, os.path.join(CWD, "{}/zebra.conf".format(rname))
        )
        router.load_config(
            TopoRouter.RD_BGP, os.path.join(CWD, "{}/bgpd.conf".format(rname))
        )
        router.load_config(
            TopoRouter.RD_OSPF, os.path.join(CWD, "{}/ospfd.conf".format(rname))
        )
        router.load_config(
            TopoRouter.RD_LDP, os.path.join(CWD, "{}/ldpd.conf".format(rname))
        )
    tgen.start_router()