Multicasting Overview

Benefits of Multicasting

•Scalability

•Differentiate offering

•Improve quality of broadcast

•Economic

•Build barriers to entry

•Reduced turnover/ “Stickier” sale

•Access to exclusive content

The Yahoo! broadcast Network

MULTICAST

Spri

nt

MCI

GTE

UUN

et

UNICAST

Content Out

Satellite FeedVideo

FeedAudio Feed

Analog

Content In

Yahoo! broadcast

AT&

T

Private Frame Relayand T-1 AggregationNetwork

Digital

Infrastructure with Peering & Multicasting

Satellite Feed

VideoFeed

Audio Feed

AnalogDigital

Yahoo! broadcast

Internet

MulticastAffiliates

MulticastAffiliates

SprintGTEAT&T

Cable and Wireless

WorldCom/UUNet

Level 3

Satellite Link Direct Peering Partners

CLECSILECSBroadband Providers/Affiliates

ISPs

Multicast StreamsEvents

Clients, End Users,

Enterprises

Enterprise Connection

Unicast

The Yahoo! broadcast Network

Combination of Centralized content aggregation and distribution and distributed server network

• Multi-homed– Control– Greatest reach possible– Highest quality

experience

Typical Unicast Model

Multicasting Via Tunnels

Multicasting Via Peering

Typical ISP Network

The ISP NetworkThe Terminal Server

The terminal server is the point of entry for the dial access client

• Most typically Deployed Terminal Servers:– Cisco AS 5000 Series– Ascend Max Series 2000,

4000, 6000, TNT– 3Com USR Total Control

Series with HiperArc Processor Cards

– Lucent Portmaster Series

The ISP Network: The Switch

The switch is the base point of distribution within a LAN environment

Common Switch Vendors:

• Cisco• 3 Com• Nortel

The ISP Network: The Border Router

The border Router is the point of access for content delivery

• Common Routers:– Cisco– Nortel– Ascend TNT

The ISP Network:Radius

Radius is the typical platform used for authentication & accounts is dial access networks

• Common Radius Implementations– Livingston– Radius (USA)– 3rd party

• Funk steel belted• Emerald

Multicasting Overview

October 28, 1999