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Printed in USA. scr 155 or 622 Mb/s ATM 1 Gb/s Ethernet 74 37 State of the Internet POP 5000 2 x OC48 4000 City-Pair Bandwidth Requirements 3000 Mbps OC48 Tier 1 ISP 2000 2 x OC12 1000 OC12 Tier 2 ISP 500 0 Jan ’96 1503 0925_04F9_c1 Jan ’97 Jan ’98 © 1999, Cisco Systems, Inc. Jan ’99 75 Example ISP/IXC Backbones 1503 0925_04F9_c1 © 1999, Cisco Systems, Inc. Copyright © 1998, Cisco Systems, Inc. All rights reserved. Printed in USA. scr 76 38 WorldCom/UUnet Backbone Source: WorldCom/UUnet 1503 0925_04F9_c1 © 1999, Cisco Systems, Inc.

All rights reserved. Printed in USA. scr 98 49 Deployment of New Services • Is more of a business decision • The technical aspect is to ensure continued network performance— scalability and stability • Remember that services which might cross AS boundaries are statistically less probable of being successful 1503 0925_04F9_c1 © 1999, Cisco Systems, Inc. 99 Deploying New Services • Don’t feed the hype fire • By all means—deploy new services as they are developed—but do so rationally and with consideration to the impact of existing connectivity • Don’t deploy new technologies and services just for the sake of it; have valid business and technical reasons 1503 0925_04F9_c1 © 1999, Cisco Systems, Inc.

Do not allow new services to oversubscribe the network capacity more than it may have already been over-subscribed prior to deployment of said services 1503 0925_04F9_c1 © 1999, Cisco Systems, Inc. Copyright © 1998, Cisco Systems, Inc. All rights reserved. Printed in USA. scr 98 49 Deployment of New Services • Is more of a business decision • The technical aspect is to ensure continued network performance— scalability and stability • Remember that services which might cross AS boundaries are statistically less probable of being successful 1503 0925_04F9_c1 © 1999, Cisco Systems, Inc.

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Cisco - IXC Architecture 1503


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