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STP and link aggregation
What you will learn
Why loops kill networks
Flapping entries
IEEE 802.1D origins
How switches communicate
Fields in the frame
Priority plus MAC
Who becomes the root
Test your knowledge
Measuring distance to root
Best path toward root
Best port on each segment
Breaking the loop
Blocking to forwarding
Waiting for change
Transition phases
Normal operation
Hello, MaxAge, ForwardDelay
Test your knowledge
Reacting to failures
The 50-second problem
IEEE 802.1w benefits
Root, Designated, Alternate, Backup
Simplified model
Fast negotiation
PortFast equivalent
Test your knowledge
Combining multiple links
Bandwidth and redundancy
Manual or negotiated
IEEE 802.3ad protocol
Controlling selection
Distributing traffic
Test your knowledge
Design guidelines
Summary of concepts
