raw:
  Minimum headers for transportation of original L2 payload: ethpayload(1500)	= 1500
  GREv4: gre(4) over ipv4(20) over ethpayload(1500)	= 1476
  GREv6: gre(4) over ipv6(40) over ethpayload(1500)	= 1456
  GIFv4: gifv4(0) over ipv4(20) over ethpayload(1500)	= 1480
  GIFv6: gifv6(0) over ipv6(40) over ethpayload(1500)	= 1460
  EthIPv4: ethhdr(14) over ethip(2) over ipv4(20) over ethpayload(1500)	= 1464
  EthIPv6: ethhdr(14) over ethip(2) over ipv6(40) over ethpayload(1500)	= 1444
  L2TPv2-UDPv4: ppp(2) over l2tpv2(16) over udp(8) over ipv4(20) over ethpayload(1500)	= 1454
  L2TPv2-UDPv6: ppp(2) over l2tpv2(16) over udp(8) over ipv6(40) over ethpayload(1500)	= 1434
  L2TPv3-UDPv4: ppp(2) over l2tpv3(18) over udp(8) over ipv4(20) over ethpayload(1500)	= 1452
  L2TPv3-UDPv6: ppp(2) over l2tpv3(18) over udp(8) over ipv6(40) over ethpayload(1500)	= 1432
  VTUNv4: vtun(2) over udp(8) over ipv4(20) over ethpayload(1500)	= 1470
  VTUNv6: vtun(2) over udp(8) over ipv6(40) over ethpayload(1500)	= 1450

NTT/PPPoE_v4:
  Minimum headers for transportation of original L2 payload: ntt_pppoe4(46) over ethpayload(1500)	= 1454
  GREv4: gre(4) over ipv4(20) over ntt_pppoe4(46) over ethpayload(1500)	= 1430
  GIFv4: gifv4(0) over ipv4(20) over ntt_pppoe4(46) over ethpayload(1500)	= 1434
  EthIPv4: ethhdr(14) over ethip(2) over ipv4(20) over ntt_pppoe4(46) over ethpayload(1500)	= 1418
  L2TPv2-UDPv4: ppp(2) over l2tpv2(16) over udp(8) over ipv4(20) over ntt_pppoe4(46) over ethpayload(1500)	= 1408
  L2TPv3-UDPv4: ppp(2) over l2tpv3(18) over udp(8) over ipv4(20) over ntt_pppoe4(46) over ethpayload(1500)	= 1406
  VTUNv4: vtun(2) over udp(8) over ipv4(20) over ntt_pppoe4(46) over ethpayload(1500)	= 1424

NTT/PPPoE_v4+OCN_v6:
  Minimum headers for transportation of original L2 payload: ppp(2) over l2tpv2(16) over udp(8) over ipv4(20) over ntt_pppoe4(46) over ethpayload(1500)	= 1408
  GREv6: gre(4) over ipv6(40) over ppp(2) over l2tpv2(16) over udp(8) over ipv4(20) over ntt_pppoe4(46) over ethpayload(1500)	= 1364
  GIFv6: gifv6(0) over ipv6(40) over ppp(2) over l2tpv2(16) over udp(8) over ipv4(20) over ntt_pppoe4(46) over ethpayload(1500)	= 1368
  EthIPv6: ethhdr(14) over ethip(2) over ipv6(40) over ppp(2) over l2tpv2(16) over udp(8) over ipv4(20) over ntt_pppoe4(46) over ethpayload(1500)	= 1352
  L2TPv2-UDPv6: ppp(2) over l2tpv2(16) over udp(8) over ipv6(40) over ppp(2) over l2tpv2(16) over udp(8) over ipv4(20) over ntt_pppoe4(46) over ethpayload(1500)	= 1342
  L2TPv3-UDPv6: ppp(2) over l2tpv3(18) over udp(8) over ipv6(40) over ppp(2) over l2tpv2(16) over udp(8) over ipv4(20) over ntt_pppoe4(46) over ethpayload(1500)	= 1340
  VTUNv6: vtun(2) over udp(8) over ipv6(40) over ppp(2) over l2tpv2(16) over udp(8) over ipv4(20) over ntt_pppoe4(46) over ethpayload(1500)	= 1358

NTT/pre_isp_v4+OCN_v6:
  Minimum headers for transportation of original L2 payload: ppp(2) over l2tpv2(16) over udp(8) over ipv4(20) over nttw_p4(62) over ethpayload(1500)	= 1392
  GREv6: gre(4) over ipv6(40) over ppp(2) over l2tpv2(16) over udp(8) over ipv4(20) over nttw_p4(62) over ethpayload(1500)	= 1348
  GIFv6: gifv6(0) over ipv6(40) over ppp(2) over l2tpv2(16) over udp(8) over ipv4(20) over nttw_p4(62) over ethpayload(1500)	= 1352
  EthIPv6: ethhdr(14) over ethip(2) over ipv6(40) over ppp(2) over l2tpv2(16) over udp(8) over ipv4(20) over nttw_p4(62) over ethpayload(1500)	= 1336
  L2TPv2-UDPv6: ppp(2) over l2tpv2(16) over udp(8) over ipv6(40) over ppp(2) over l2tpv2(16) over udp(8) over ipv4(20) over nttw_p4(62) over ethpayload(1500)	= 1326
  L2TPv3-UDPv6: ppp(2) over l2tpv3(18) over udp(8) over ipv6(40) over ppp(2) over l2tpv2(16) over udp(8) over ipv4(20) over nttw_p4(62) over ethpayload(1500)	= 1324
  VTUNv6: vtun(2) over udp(8) over ipv6(40) over ppp(2) over l2tpv2(16) over udp(8) over ipv4(20) over nttw_p4(62) over ethpayload(1500)	= 1342

NTTe/dnet_v6:

NTTw/pre_isp_v4:
  Minimum headers for transportation of original L2 payload: nttw_p4(62) over ethpayload(1500)	= 1438
  GREv4: gre(4) over ipv4(20) over nttw_p4(62) over ethpayload(1500)	= 1414
  GIFv4: gifv4(0) over ipv4(20) over nttw_p4(62) over ethpayload(1500)	= 1418
  EthIPv4: ethhdr(14) over ethip(2) over ipv4(20) over nttw_p4(62) over ethpayload(1500)	= 1402
  L2TPv2-UDPv4: ppp(2) over l2tpv2(16) over udp(8) over ipv4(20) over nttw_p4(62) over ethpayload(1500)	= 1392
  L2TPv3-UDPv4: ppp(2) over l2tpv3(18) over udp(8) over ipv4(20) over nttw_p4(62) over ethpayload(1500)	= 1390
  VTUNv4: vtun(2) over udp(8) over ipv4(20) over nttw_p4(62) over ethpayload(1500)	= 1408

NTTw/pre_square_v6:

OCN_v6:
  Minimum headers for transportation of original L2 payload: ppp(2) over l2tpv2(16) over udp(8) over ipv4(20) over ethpayload(1500)	= 1454
  GREv6: gre(4) over ipv6(40) over ppp(2) over l2tpv2(16) over udp(8) over ipv4(20) over ethpayload(1500)	= 1410
  GIFv6: gifv6(0) over ipv6(40) over ppp(2) over l2tpv2(16) over udp(8) over ipv4(20) over ethpayload(1500)	= 1414
  EthIPv6: ethhdr(14) over ethip(2) over ipv6(40) over ppp(2) over l2tpv2(16) over udp(8) over ipv4(20) over ethpayload(1500)	= 1398
  L2TPv2-UDPv6: ppp(2) over l2tpv2(16) over udp(8) over ipv6(40) over ppp(2) over l2tpv2(16) over udp(8) over ipv4(20) over ethpayload(1500)	= 1388
  L2TPv3-UDPv6: ppp(2) over l2tpv3(18) over udp(8) over ipv6(40) over ppp(2) over l2tpv2(16) over udp(8) over ipv4(20) over ethpayload(1500)	= 1386
  VTUNv6: vtun(2) over udp(8) over ipv6(40) over ppp(2) over l2tpv2(16) over udp(8) over ipv4(20) over ethpayload(1500)	= 1404