1draft-oki-pce-vntm-def-00.txt

Definition of Virtual Network Topology Manager (VNTM) for PCE-based Inter-Layer MPLS and

GMPLS Traffic Engineering

draft-oki-pce-vntm-def-00.txt

July 13, 2006

Eiji Oki (NTT)Jean-Louis Le Roux (France Telecom)

Adrian Farrel (Old Dog Consulting)

2draft-oki-pce-vntm-def-00.txt

Background

• Virtual Network Topology (VNT) needs to be controlled and managed in cooperation with inter-layer path computation.

• VNTM appears in a PCE-VNTM cooperation model for inter-layer path control (draft-ietf-pce-inter-layer-frwk-01).– VNTM is considered as a functional element.

• Definition of Virtual Network Topology Manager (VNTM) is required.– for use in the PCE context– but not to provide a full framework and definition for VNT

Manager. (response to Dimitri’ comments on the list.)

3draft-oki-pce-vntm-def-00.txt

Draft overview• Cooperation model between PCE and

VNTM for Inter-Layer Path Control• VNT Management• Functions of VNT Manager

4draft-oki-pce-vntm-def-00.txt

PCE-VNTM cooperation model

• PCE performs inter-layer path computation.

• VNTM controls lower-layer path setup.

7

VNT ManagerPCE

IngressEgress

L1 L2

H1 H2 H3 H4 H5

Lower-layer network

High-layer network

L3

1

2

35

6

4

Mono-layer path: H1-H2-H4-H5

8

5draft-oki-pce-vntm-def-00.txt

PCE-VNTM cooperation model (cont’d)• Extend the basic PCE-VNTM cooperation model to the

case of multiple PCEs.

• PCE-Hi and PCE-Lo have each layer’s TE topology, respectively.

9

VNT Manager

PCE-Hi

IngressEgress

L1 L2

H1 H2 H3 H4 H5

Lower-layer network(GMPLS network)

High-layer network(MPLS network)

L3

1

2

57

8

6

10

PCE-Lo3

4

6draft-oki-pce-vntm-def-00.txt

Functions of VNT Manager• Lower-layer LSP Setup• Advertisement of the VNT to the Higher Layer• Policy Control

7draft-oki-pce-vntm-def-00.txt

Next step…

• Request for feedback– Continue discussion on VNTM functions.

• Can this become a WG document?