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Leaf discovery mechanism for mLDP based P2MP/MP2MP LSP. draft-jin-mpls-mldp-leaf-discovery-01 Lizhong Jin, ZTE Kebo Liu, Nokia Siemens Networks. Version 00 vs 01. Thank for additional comments from Rahul Aggarwal, Dimitri Papadimitriou, Frederic Jounay and Simon DeLord

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leaf discovery mechanism for mldp based p2mp mp2mp lsp

Leaf discovery mechanism for mLDP based P2MP/MP2MP LSP

draft-jin-mpls-mldp-leaf-discovery-01

Lizhong Jin, ZTE

Kebo Liu, Nokia Siemens Networks

version 00 vs 01
Version 00 vs 01
  • Thank for additional comments from
    • Rahul Aggarwal, Dimitri Papadimitriou, Frederic Jounay and Simon DeLord
  • Add a new leaf discovery mechanism based on MP-BGP.
mp bgp leaf discovery mldp leaf nlri
MP-BGP leaf discovery - mLDP leaf NLRI

+-------------------------------------------+

| mLDP MP FEC Element Length (1 octet) |

+-------------------------------------------+

| mLDP MP FEC Element (Variable) |

+-------------------------------------------+

| Leaf Node Address Length (1 octet) |

+-------------------------------------------+

| Leaf Node Address (Variable) |

+-------------------------------------------+

  • Defines a new BGP NLRI, called mLDP leaf NLRI.
  • The mLDP leaf NLRI is advertised in BGP UPDATE messages.
  • The [AFI, SAFI] value pair used to identify this NLRI
    • AFI for MPLS Multicast, pending, IANA allocation
    • SAFI for mLDP leaf discovery, pending IANA allocation
mp bgp leaf discovery node operation
MP-BGP leaf discovery - Node operation
  • When the leaf node is triggered to join one P2MP/MP2MP LSP
    • The leaf node sends BGP UPDATE messages with MP_REACH_NLRI to its root node
  • When the leaf node is triggered to leave one P2MP/MP2MP LSP
    • The leaf node sends BGP UPDATE messages with MP_UNREACH_NLRI to its root node
leaf discovery application
Leaf discovery & application
  • Leaf discovery depends on application.
  • Generally,
    • Application with LDP signaling, may use leaf discovery mechanism based on T-LDP.
    • Application with MP-BGP signaling, may use leaf discovery mechanism based on MP-BGP.
next steps
Next steps
  • Need comments from work group

Thank you