Basic HTML version of Foils prepared Dec. 6 98

Foil 9 Transparent Bridging (3)

From Introduction to Network Security Lectures at Xi'an Jaotong University -- Sept 1998. by Roman Markowski
Spanning Tree Algorithm
  • developed by Digital
  • preserves the benefits of loops
  • eliminates "bridging loop problem"
  • IEEE 802.1d (final specification, not compatible with initial Digital solution)
  • there are 5 possible states considered by a bridge
    • disabled; blocking; listening; learning; forwarding
  • terminology
    • unique bridge identifier; port identifier; root bridge; path cost; root port; root path cost; designated bridge and port

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