HP J3178A Hardware Installation Manual page 104

Spanning Tree Operation
Spanning Tree Protocol (STP)
Figure D-1. Example of Logical and Redundant Paths Between Two Nodes
D-2
• Active path from node A to node B: 1—> 3
• Backup (redundant) path from node A to node B: 4 —> 2 —> 3
switch A
1
path cost:
100
switch B switch C
4
path cost: 200
node
A
3
path cost: 100
2
path cost: 100
switch D
node
B