Rrouting_protocols - Routing Protocols Interior Gateway...

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Routing Protocols Interior Gateway Protocols Exterior Gateway Protocols -- by Dijiang Huang
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2 Routing within Networks 1 7 5 4 3 8 6 2
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3 Routing within Networks Next Hop routing Dest: (1) Next Hop Dest (2) Next hop Dest (3) Next hop Dest (4) Next hop 1 - 1 2-1 1 3-1 1 4-2 2 1-2 2 - 2 3-1 2 4-2 3 1-3 3 2-1 3 - 3 4-6 4 1-2 4 2-4 4 3-6 4 - :
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4 Modified Network 1 7 5 4 3 8 6 2
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5 Modified Routing Modified Next Hop routing Dest: (1) Next Hop Dest (2) Next hop Dest (3) Next hop Dest (4) Next hop 1 - 1 2-1 1 3-1 1 4-2 2 1-2 2 - 2 3-1 2 4-2 3 1-3 3 2-1 3 - 3 4-2 4 1-2 4 2-4 4 3-1 4 - :
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6 Default Routing within Networks Default routing Dest: (1) Next Hop Dest (2) Next hop Dest (3) Next hop Dest (4) Next hop 1 - 1 2-1 1 3-1 1 4-2 2 1-2 2 - 2 3-1 2 4-2 3 1-3 3 2-1 3 - 3 4-6 * 1-2 4 2-4 4 3-6 4 - :
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7 Building Routing Tables Static Tables Used when routing choices are limited or unchanging Often used in small networks. Dynamic tables Entries updated automatically as network status changes. Used in both Interior Gateways and Exterior Gateways
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8 Interior Gateway Protocols Designed to identify “best” paths between routers within a network. May use different metrics to select path Routing Information Protocol (RIP) Older protocol: Smaller networks Open Shortest Path First (OSPF) Protocol scales better for large networks.
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9 Autonomous System A set of routers under a single technical administration,
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This note was uploaded on 10/28/2009 for the course CSE 598 taught by Professor Huang during the Fall '09 term at University of Arizona- Tucson.

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Rrouting_protocols - Routing Protocols Interior Gateway...

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