414Lecture16

414Lecture16 - Lecture 16 Network Layer IPv6, Broadcast and...

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Lecture 16 Network Layer IPv6, Broadcast and Multicast Routing ECSE 414 – Fall 2010
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ECSE 414, Lecture 16 2 Announcements Homework 4 released Due Thursday, November 11 Midterms returned today Solutions posted on WebCT 2010 Michael Rabbat
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Midterm Results 2010 Michael Rabbat ECSE 414, Lecture 16 3 15 20 25 30 35 40 45 50 55 60 0 5 10 15 20 Score Number of Students Mean = 40.4194 Median = 40.75 Max = 58
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2010 Michael Rabbat ECSE 414, Lecture 16 4 14 16 18 20 22 24 26 28 30 0 5 10 15 20 25 Score Mean = 23.12 Median = 24 Max = 29.5 Question 1 0 2 4 6 8 10 12 14 16 18 20 0 5 10 15 Score Mean = 7.29 Median = 7 Max = 17 Question 2 1 3 5 7 9 11 13 15 0 5 10 15 20 Score Question 3 Mean = 10.01 Median = 10.75 Max = 14.5
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ECSE 414, Lecture 16 5 IPv6 Initial motivation: 32-bit address space soon to be completely allocated. Additional motivation: header format helps speed processing/forwarding header changes to facilitate QoS IPv6 datagram format: fixed-length 40 byte header no fragmentation allowed 2010 Michael Rabbat
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ECSE 414, Lecture 16 6 IPv6 Header (Cont) Priority: identify priority among datagrams in flow Flow Label: identify datagrams in same “flow.” (concept of“flow” not well defined). Next header: identify upper layer protocol for data Checksum : removed entirely to reduce processing time at each hop 2010 Michael Rabbat
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ECSE 414, Lecture 16 7 Transition From IPv4 To IPv6 Not all routers can be upgraded simultaneously no “flag days” How will the network operate with mixed IPv4 and IPv6 routers? Tunneling: IPv6 carried as payload in IPv4 datagram among IPv4 routers 2010 Michael Rabbat
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ECSE 414, Lecture 16 8 Tunneling A B E F IPv6 IPv6 IPv6 IPv6 tunnel Logical view: Physical view: A B E F IPv6 IPv6 IPv6 IPv6 IPv4 IPv4 2010 Michael Rabbat
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ECSE 414, Lecture 16 9 Tunneling A B E F IPv6 IPv6 IPv6 IPv6 tunnel Logical view: Physical view: A B E F IPv6 IPv6 IPv6 IPv6 C D IPv4 IPv4 Flow: X
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414Lecture16 - Lecture 16 Network Layer IPv6, Broadcast and...

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