draft-li-mpls-proxy-te-lsp-00IETF 87 MPLS 1

Proxy MPLS Traffic Engineering Label Switched Path(LSP)

draft-li-mpls-proxy-te-lsp-00

Zhenbin Li, Xinzong ZengHuawei Technologies

IETF 87, Berlin, Germany

draft-li-mpls-proxy-te-lsp-00IETF 87 MPLS 2

Introduction• [I-D. draft-li-mpls-seamless-mpls-mbb-00 ]

introduced the framework and requirement of Seamless MPLS for mobile backhaul networks.

• The draft is to provide a method, Proxy TE , to setup proxy egress MPLS TE LSP with RSVP-TE which could stitch with BGP LSP to form an end-to-end LSP.

Define a new RSVP-TE object: Proxy Destination Object Procedures of Setup Proxy TE LSP

draft-li-mpls-proxy-te-lsp-00IETF 87 MPLS 3

Requirement on Proxy Egress MPLS TE LSPProxy egress MPLS TE LSP has to be setup in mobile backhaul

networks to stitch BGP LSP for Seamless MPLS.

Transport Layer

MPLS TE LSPBGP LSP

Hierarchical BGP LSP

Service Layer

L2/L3 Services

Next-Hop self

Last Mile Access Aggregation Core

RSG

RSG

CSG

BTS

eNB

NodeB

BSC

ASG

ASG

RNC

S-GW/MME

CSG

CSG

CSG

CSG

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RSVP-TE Extension• IPv4 Proxy Destination Object

Class-Num = TBD ((of form 0bbbbbbb)

0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Length | Class-Num | C-Type (1) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | IPv4 Proxy Destination Address | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

• IPv6 Proxy Destination Object

0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Length | Class-Num | C-Type (2) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | | IPv6 Proxy Destination Address | | | | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

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Procedures

• Ingress: Use the proxy destination address to calculate path and the setup procedure is the same as current process.

• Egress: Identify itself as the proxy node, stitch the proxy RSVP-TE with the other LSP, return RESV message with the same proxy destination object.

AN P AGN Remote AN

LSPPath messageResv messagePATH message

Session Object : tunnel end point address

= Remote ANProxy Destination Object : proxy destination

address = AGN

PATH message Session Object : tunnel end point address

= Remote ANProxy Destination Object : proxy destination

address = AGN

RESV messageProxy Destination Object : proxy destination

address = AGN

RESV messageProxy Destination Object : proxy destination

address = AGN

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Next Steps• Solicit more Get comments on mailing list• More scenarios will be taken into account.