Generalized MPLS Signaling for Layer-2 LSPs

draft-papadimitriou-ccamp-gmpls-l2sc-lsp-00.txt

D.Papadimitriou (dpapadimitriou@psg.com)

D.Brungard (dbrungard@att.com)

M.Vigoureux (martin.vigoureux@alcatel.fr)

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]

1

2

3

4

5

6

7

8

9

1 3 6 9

2 4 7 8

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 ?