def METHOD_NAME():
    tgen = get_topogen()
    cmds_list = [
        'ip link add vrf1 type vrf table 10',
        'echo 10 > /proc/sys/net/mpls/platform_labels',
        'ip link set dev vrf1 up',
        'ip link set dev {0}-eth1 master vrf1',
        'echo 1 > /proc/sys/net/mpls/conf/{0}-eth0/input',
        'ip tunnel add {0}-gre0 mode gre ttl 64 dev {0}-eth0 local 10.125.0.{1} remote 10.125.0.{2}',
        'ip link set dev {0}-gre0 up',
        'echo 1 > /proc/sys/net/mpls/conf/{0}-gre0/input',
    ]
    for cmd in cmds_list:
        input = cmd.format('r1', '1', '2')
        logger.info('input: ' + cmd)
        output = tgen.net['r1'].cmd(cmd.format('r1', '1', '2'))
        logger.info('output: ' + output)
    for cmd in cmds_list:
        input = cmd.format('r2', '2', '1')
        logger.info('input: ' + cmd)
        output = tgen.net['r2'].cmd(cmd.format('r2', '2', '1'))
        logger.info('output: ' + output)