Using PCE to Support Multicast over a Multi-domain MPLS Transport Network

MPLS 2009, Washington, USA.

This presentation will show how to select domain sequences for P2MP MPLS-TE and MPLS-TP transport services. We will examine the trade-off between branching in an upstream or a downstream domain to achieve an optimal path versus administrative simplicity. The presentation will also show how the use of hierarchical P2MP tunnels to carry traffic across a domain is also a practical solution to an inter-layer network problem; in a packet-optical network it can be beneficial to utilise P2MP server layer trails to achieve the best use of resources across all network layers.

You can view the presentation here.

Selecting Domain Paths in Inter-Domain MPLS-TP and MPLS-TE Networks

MPLS 2009, Washington, USA.

In this presentation we explain the latest mechanisms for the selection of domains that comprise the end-to-end domain sequence. We examine how BRPC could provide the necessary function, but show how it doesn’t scale to large networks. Instead, a new model of hierarchical PCEs is explained. This way of performing PCE cooperation enables rapid and scalable selection of optimal paths and can take advantage of both typical traffic engineering constraints (hop count, bandwidth, SRLG, path cost, etc.) and also more commercially relevant constraints such as policy, SLAs, security, peering preferences, and dollar costs.

You can view the presentation here.

Using PCE to support Multicast over a Multi-domain MPLS Transport Network

MPLS 2009, Washington, USA.

This presentation will show how to select domain sequences for P2MP transport services. We will examine the trade-off between branching in an upstream or a downstream domain to achieve an optimal path versus administrative simplicity. The presentation will also show how the use of hierarchical P2MP tunnels to carry traffic across a domain is also a practical solution to an inter-layer network problem; in a packet-optical network it can be beneficial to utilise P2MP server layer trails to achieve the best use of resources across all network layers

You can view the presentation here.

Selecting Domain Paths in Inter-Domain MPLS-TE and GMPLS

iPOP 2009, Tokyo, Japan.

The presentation demonstrates how a hierarchical PCE architecture can be used to determine end-to-end paths in multi-domain GMPLS and MPLS-TE networks.

You can view the presentation here.

Network Virtualisation for Packet Optical Networks

iPOP 2009, Tokyo, Japan.

This presentation shows how there is a commercial and operational trade-off between connectivity and traffic aggregation, itl discusses how to determine where aggregation should occur as well as how these points can be dynamically moved within the network as traffic demand varies.

You can view the presentation here.

Supporting Multicast over a Multi-domain Optical Network

iPOP 2009, Tokyo, Japan.

This presentation examines how a multi-layer P2MP solution can be built, and looks at the implications for P2MP in multi-domain networks. We examine how multi-domain issues in the packet layer are more prevalent in the transport layer, and show how to combine network planning techniques with new Path Computation Element ideas to achieve optimal delivery of high-capacity multicast services over multidomain optical networks.

You can view the presentation here.