SPANNING FULL

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Ved Faiz El Mamouni Benyoucef

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Ved Michael Collins

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Ved ABHISHEK KUMAR

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Ved Rodrigo Rojas Moraleda

SPANNING TREE OVERVIEW

TYPES OF STP

MULTIPLE SPANNING-TREE (802.1S)

UPTO 15 INSTANCES SUPPORTED ON EVERY SWITCH

1 INSTANCE OF STP FOR A GROUP OF VLANs

RAPID PER-VLAN SPANNING-TREE(RPVST)

RAPID SPANNING-TREE (802.1W)

PORT TYPES

POINT TO POINT PORT

HALF-DUPLEX ON SHARED MEDIA

DESIGNATED PORT

ROOT PORT

EDGE PORT

NO LONGER EDGE WHEN BPDUs RECIEVED

HOST PORT

DISCARDING

BACKUP

ALTERNATE

PER-VLAN SPANNING-TREE PLUS +

OPERATES OVER BOTH DOT1Q AND ISL

INTEROPERABILITY BETWEEN CST & PVST

PER-VLAN SPANNING-TREE

ISL BASED

1 INSTANCE OF STP PER VLAN

COMMON SPANNING-TREE

DOT1Q BASED (NATIVE VLAN)

1 INSTANCE OF STP

802.1D(TRADITIONAL)

TIMERS

MAX-AGE (20 sec)

FORWADING (15 sec)

HELLO (2 sec)

PORT STATES

FORWARDING

LEARNING

LISTENING

BLOCKED

DISABLED

PORT ROLES

BLOCKING

DESIGNATED

ROOT

SPEED CONVERGENCE

BACKBONE-FAST

FOR INDIRECT FAILOVER

UPLINK-FAST

FOR DIRECT FAILOVER

PORT-FAST

ON ACCESS LAYER CONNECTED TO HOSTS TO REMOVE MAX-AGE TIMER DELAY

STP PROTECTION

LOSS OF BPDUs

UDLD(UNI-DIRECTIONAL LINK DETECTION)

DETECTS BY SENDING KEEPALIVES

1 WAY OR DIRECTIONAL LINK DETECTION

LOOP-GUARD

WITH: PORT BECOME INCONSISTENT

WITHOUT: PORT STARTS FORWARDING

DETECTS LOSS OF BPDUs

BPDU FILTERING

REQIURES PORT-FAST

DISABLES BPDUs ON PORT