Spanning Tree Protocol

STP

STP and
PVSTP

RSTP and
Rapid PVSTP

States

Blocking

Listening

Learning

Forwarding

Disabled

Roles

Roles

Root

Designated

Alternate

Backup

Disabled

IEEE 802.1D

IEEE 802.1w

MSTP

IEEE 802.1s

Root

States

Discarding

Learning

Forwarding

Designated

Non Designated

Other

Portfast

BPDU Guard

Instances

IST

MSTI

Roles

Root

Designated

Alternate

Backup

Roles

Root

Designated

Master

Alternate

Backup

Default MSTP

General Facts

Priority Lower is Better

Default Priority 32768

Priority multiples of 4096

Converged is when all Switches are Sync