l11_feb19 - Lecture 11 Routing in Virtual Circuit Networks...

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1 Lecture 11 Routing in Virtual Circuit Networks Internet Addressing
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2 Projects and midterm Progress report Monday February 25, 8 AM from all individuals or groups. Midterm: Tuesday, February 26, 7-7:30 PM. Material – Chapters 1,2, and 4 up to the last lecture. Open book. 3 questions: 30 minutes
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3 Switch A Switch B inPort = 6 inVC = 9 outPort = 2 outVC = 13 2 Host a 6 Host b 5 1 inPort = 6 inVC = 11 outPort = 2 outVC = 15 inPort = 5 inVC = 4 outPort = 1 outVC = 9 inPort = 1 inVC = 10 outPort = 5 outVC = 5 inPort = 2 inVC = 12 outPort = 6 outVC = 8 inPort = 2 inVC = 14 outPort = 6 outVC = 10 12 13 14 15 8 9 10 11 Updated forwarding table of Switch A . inPort inVC outPort outVC 2 12 6 8 6 9 2 13 2 14 6 10 6 11 2 15 3 4 5 6 Initial forwarding table of Switch B. inPort inVC outPort outVC 1 8 5 3 5 4 1 9 Updated forwarding table of Switch B. inPort inVC outPort outVC 1 8 5 3 5 4 1 9 1 10 5 5 5 6 1 11 Initial forwarding table of Switch A. inPort inVC outPort outVC 2 12 6 8 6 9 2 13 inPort = 5 inVC = 6 outPort = 1 outVC = 11 9 8 11 inPort = 1 inVC = 8 outPort = 5 outVC = 3 2 2
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4 Scalability issues with VCs Assume a router with n input and n output lines of b Gbps average packet size l bytes determine the size of the routing table
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5 Message delivery to processes Host Process Network Network Router Network interface Port IP address = (NetworkId, HostId)
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