Generalized MPLS Signaling for Layer-2 LSPs
description
Transcript of Generalized MPLS Signaling for Layer-2 LSPs
Generalized MPLS Signaling for Layer-2 LSPs
draft-papadimitriou-ccamp-gmpls-l2sc-lsp-00.txt
D.Papadimitriou ([email protected])
D.Brungard ([email protected])
M.Vigoureux ([email protected])
Why ?
• Goal: RFC 3473 support of L2SC LSPs– L2 switching architecture: [X,L2SC],…,
[L2SC,L2SC],…,[L2SC,X] where X = Any (in particular, PSC)
– Layered switching architectures (FA LSP’s): [L2SC,Y],…,[Y,L2SC] where Y = Any (in particular, TDM or LSC)
• Non-Goal: PW architecture (~ provisioned overlays over PSN)
L2SC LSP and Setup Methods
• L2SC LSP => “tunnel” for Ethernet payload transport w/o necessarily using MPLS PW’s and other extended p2p LDP signaling
• Methods for e2e LSP Setup– direct e2e LSP setup– LSP nesting (FA-LSP in network)– LSP stitching (LSP Segment in network)– LSP shuffling (~ GMPLS VPN)
LSP Nesting & Stitching/Shuffling
Ethernet LSP
FA-LSP (ex: TDM LSP)
I/fEthernet
Ethernet LSP
Ethernet LSP Ethernet LSP
Ethernet LSP
Stitching
Shuffling
Nesting (FA)[L2SC,X][X,L2SC] [Y,L2SC][L2SC,Y] [Y,Y]
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What do we need ?
• Not that much … since max re-use of existing GMPLS RFC’s
• Get agreement on GPID’s e.g. GFP, X.86• Get agreement on label semantic(s) e.g. Port, Flow,
VLAN • Get agreement on bandwidth encoding (any
enhancement from current TSPEC ?)
=> Support from the working group to refine GMPLS procedures for L2SC LSPs ?