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Printed in USA. scr 66 33 Policy Architecture— Core Functions • High speed transport • Congestion management • QoS/CoS administration (queuing/dropping) • Traffic management 1503 0925_04F9_c1 67 © 1999, Cisco Systems, Inc. Policy Architecture Implementation POP POP Edge Backbone POP POP Policy Implementations Require Cooperative Edge and Backbone Functions 1503 0925_04F9_c1 © 1999, Cisco Systems, Inc. Copyright © 1998, Cisco Systems, Inc. All rights reserved. Printed in USA. scr 68 34 An ISP—The Big Picture Content Services Domestic Peering Security Services Directory Services Global Internet xDSL HFC Direct Network 1503 0925_04F9_c1 Non-Direct Individual Dial-Up Network Satellite and Wireless 69 © 1999, Cisco Systems, Inc.

All rights reserved. Printed in USA. scr 84 42 ISP/IXC Interconnection Points NAP ISP Z CIX ISP D ISP C ISP B MAE West ISP A NAP MAE West Source: WorldCom MAE Services 1503 0925_04F9_c1 85 © 1999, Cisco Systems, Inc. Exchange Points Generally… • Do not include peering agreements with any of the ISP’s who are connected Peering • Do not include transit with any of the ISP’s who are connected Transit • Do not guarantee that there will be specific major ISP’s present • Do not provide IP addresses or AS (Autonomous System) numbers 1503 0925_04F9_c1 © 1999, Cisco Systems, Inc.

87 Exchange Points Generally… • Climate-controlled collocation space • Physical security for equipment • A place to interconnect with other IXC’s/ISP’s • Various connection options • Provide only “layer 2” connectivity— prefers to remain politically agnostic 1503 0925_04F9_c1 © 1999, Cisco Systems, Inc. Copyright © 1998, Cisco Systems, Inc. All rights reserved. Printed in USA. scr 88 44 Exchange Point Examples 1503 0925_04F9_c1 89 © 1999, Cisco Systems, Inc. Pacific Bell NAP Source: Pacific Bell 1503 0925_04F9_c1 © 1999, Cisco Systems, Inc.

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Cisco - IXC Architecture 1503


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