Transparent Bridging (3)
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