CCNA 2 - Capitulo 5.2

CCNA 2 - Capitulo 5.2

1. STP - SPANNING TREE PROTOCOL (802.1D)

   • TIMERS
     • HELLO TIMER
       • INTERVAL BETWEEN BPDUs
         • DEFAULT IS 2 SECONDS
       • MODIFIED TO BETWEEN
         • 1 AND 10 SECONDS
     • FORWARD DELAY TIMER
       • DELAY IN THE STATE
         • LISTENING AND LEARNING
       • DEFAULT 15 SECONDS
       • MODIFIED TO BETWEEN
         • 4 AND 30 SECONDS
     • MAX AGE TIMER
       • MAX AGE AND MAXIMUM LENGHT OF TIME
         • BEFORE ATTEMPTING TO CHANGE THE TOPOLOGY
       • DEFAULT 20 SECONDS
       • MODIFIED TO BETWEEN
         • 4 AND 30 SECONDS
     • OBS : NOTE: THE DEFAULT TIMES CAN BE CHANGED ON THE ROOT BRIDGE, WHICH DICTATES THE VALUE OF THESE TIMERS FOR THE STP DOMAIN.
   • PORT STATE
     • 1) BLOCKING (ALTERNATE )
       • DOES NOT PARTICIPATE IN FRAME FORWARDING
       • BPDU RECEIVE ONLY
       • MAC TABLE NO UPDATE
       • SWITCHPORT NOT RECEIVED BPDU FROM NEIGHBOR IN 20 SECONDS ?
         • INTO THE BLOCKING STATE
     • 2) LISTENING
       • RECEIVES BPDUs TO DETERMINE THE PATH TO THE ROOT
       • INFORMS ADJASCENT SWITCHS
         • PREPARING PARTICIPATE TOPOLOGY
       • BPDU RECEIVE AND SEND
       • NO UPDATE MAC TABLE
       • AFTER THE BLOCKING STATE
       • PORT RECEIVES BPDUs TO DETERMINE THE PATH TO THE ROOT
     • 3) LEARNING
       • RECEIVES AND PROCESSES BPDUs
       • PREPARES TO PARTICIPATE FRAME FORWARDING
       • POPULATE MAC ADDRESS TABLE
       • USER FRAME NOT FORWARDED
       • BPDU RECEIVE AND SEND
     • 4) FORWARDING
       • SWITCHPORT IS CONSIDERED PART ACTIVE TOPOLOGY
       • USER FRAME
         • TRAFFIC SEND AND RECEIVES BPDU FRAMES
       • BPDU RECEIVE AND SEND
       • MAC TABLE
         • UPDATE TABLE
       • ONLY THIS FORWARDING DATE FRAMES
     • 5) DISABLE
       • NOT FORWARD FRAMES
         • NOT PARTRICIPATE STP
       • BPDU NONE SENT OR RECEIVE
       • MAC TABLE NO UPDATE

2. ALL PORTS SWITCHS ARE MEMBER VLAN 1

   • ONLY ONE STP INTANCE