1 / 14

Self-learning, forwarding: example

Source: A. Dest: A’. A’ A. MAC addr interface TTL. 60. 60. 1. 4. A. A’. A A’. A A’. A A’. A A’. A A’. A A’. Self-learning, forwarding: example. A. frame destination unknown:. C’. B. 1. 2. 3. flood. 6. 4. 5. destination A location known:. C. selective send. B’. A’.

ova
Download Presentation

Self-learning, forwarding: example

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Source: A Dest: A’ A’ A MAC addr interface TTL 60 60 1 4 A A’ A A’ A A’ A A’ A A’ A A’ A A’ Self-learning, forwarding: example A • frame destination unknown: C’ B 1 2 3 flood 6 4 5 • destination A location known: C selective send B’ A’ Switch table (initially empty) Data Link Layer

  2. B 2 2 A , 1 A , 1 2 2 1 1 A What will happen with loops?Incorrect learning Lecture 3

  3. What will happen with loops?Frame looping C 2 2 C,?? C,?? 1 1 A Lecture 3

  4. What will happen with loops?Frame looping B 2 2 B,2 B,1 1 1 A Lecture 3

  5. Loop-free: tree C B A message from Awill mark A’s location A Lecture 3

  6. Loop-free: tree C B A:  A message from Awill mark A’s location A Lecture 3

  7. Loop-free: tree A:  C B A:  A message from Awill mark A’s location A Lecture 3

  8. Loop-free: tree A:  A:  A:  C B A:  A:  A message from Awill mark A’s location A Lecture 3

  9. Loop-free: tree A:  A:  A:  C B A:  A:  A message from Awill mark A’s location A Lecture 3

  10. Loop-free: tree A:  A:  A:  C B A:  A:  A message from Awill mark A’s location So a message toA will go by marks… A Lecture 3

  11. A B B3 C B5 D B7 K B2 E F B1 G H B6 B4 I J Designated port / Root Port And What are these And these And this one

  12. STP Run – Find Root B3 sends BPDU A B2 sends BPDU B 1 2 3 B3 B1 sends BPDU 5 3 1 C B5 1 7 B4, B2 sends BPDU D 2 1 2 2 B7 K B2 B8 sends BPDU E F 1 9 B9 1 B1 L G H 6 1 1 8 1 4 B6 B4 B8 I M J

  13. STP Run – Block Ports B5: 5, 0, 1 B2: 2, 0, 1 A B B3 B3: BLOCK C B5 B7: 7, 0, 1 B5: 5, 0, 1 D B7 K B2 B7: BLOCK E F B9 B1 L G H B6 B4 B8 I M J

  14. Data Laptop B A B Message A to B Message B to A B3 C B5 D B7 K B2 E F B9 B1 L G H B6 B4 B8 I M J Laptop A

More Related