Routing Proximity.pdf

Routing Proximity

Stefano Previdi - sprevidi@cisco.com

ALTO - Proximity

Agenda

 Introduction and motivation

 Proximity

 Standardization & Research

ALTO - Proximity

Introduction and Motivation

Contexts

 Caching, replication, positioning and find the location of

content and services are vital for optimization of network

resources

Need to locate the nearest copy of a movie or the closest instance

of a service among several available resources

 In different contexts:

Managed Content/Application Network

Service Routing (Service Node / Service Gateway)

Traditional CDNs

Peer to Peer Overlay

BitTorrent, eMule, ...

ALTO - Proximity

Introduction and Motivation

 Application Networking assumes no constraint in location

of elements

Servers, caches, peers, hosts, ...

 Peer to peer applications are often observed to move a

single piece of content back and forth across an inter-

provider link multiple times, because the peer selection

algorithm does not take account of the network layer

topology.

According to surveys, up to ~75% of currently used BW is

consumed by p2p traffic

Provisioning is dictated by low-revenue traffic

ALTO - Proximity

Introduction - Localization Example

Server

Client

 Movie “Spiderman 42” is available from different servers. Which one to

select ? Based on which criteria ?

 Application layer goal: minimize delay, maximize user experience

 Network layer: reduce resources utilization while maintain best performance

experience

 In this context: localization is intended as the ability to find/compute the

exact location of an object

ALTO - Proximity

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