CCNA - Capitulo 7.2

CCNA - Capitulo 7.2

1. ETHERNET SWITCHING

   • THE MAC ADDRESS TABLE
     • FILTERING FRAMES
       • MAC ADDRESS KNOW
         • UNICAST
       • MAC ADDRESS UNKNOWN
         • THE SWITCH FORWARDS IT OUT ALL PORTS
           • EXCEPT THE INGRESS PORT.
         • BROADCAST ARP
         • ALL HOSTs WILL PROCESS THE FRAME.
     • AUTO-MDIX
       • SWITCH AUTOMATICALLY DETECTS THE TYPE OF CABLE ATTACHED TO THE PORT
         • AND CONFIGURES THE INTERFACES ACCORDINGLY
     • BUILD DYNAMICALLY
     • HOW TO DELETE ARP TABLE ON WINDOWS ?
       • ARP -D*
     • SWITCH LEARNING
       • THE SOURCE MAC ADDRESS EXIST ?
         • SWITCH UPDATES THE REFRESH TIMER
           • DEFAUT SWITCH - TIME
             • 5 MINUTES (300 SECONDS)
       • IF THE SOURCE MAC ADDRESS EXIST A DIFFERENT PORT ?
         • SWITCH A NEW ENTRY
         • THE SWITCH REPLACES USING SAME MAC BUT WITH MORE CURRENT PORT NUMBER
       • IF THE SOURCE MAC ADDRESS DOES NOT EXIST ?
         • 1- THE SOURCE MAC ADDRESS
           • FC:XC:DC:4D:C6:Q6
         • 2 - PORT NUMBER ENTERED THE FRAME
           • GIG 0/4
     • SWITCH FORWARDING
       • FORWARDING DECISIONS
         • 2 - QUERY YOUR MAC ADDRESS TABLE
         • 1 - VIEW DESTINATION MAC ADDRESS
     • NOTE IMPORTANT : SWITCH CAN HAVE MULTIPLE MAC ADDRESS ASSOCIATED WITH A SINGLE PORT
       • HOW IS THIS POSSIBLE ?
         • 1. UPLINK OR TRUNK PORTS CONNECTED TO ANOTHER SWITCH
         • 2. VIRTUALIZED ENVIRONMENTS WHERE MULTIPLE VIRTUAL MACHINES SHARE A SINGLE PHYSICAL NETWORK INTERFACE
         • 3. ACCESS POINTS OR IP PHONES WITH DEVICES CONNECTED BEHIND THEM
         • 4. AND 802.1Q TRUNK LINKS WHERE MAC ADDRESSES ARE LEARNED PER VLAN AND PER PORT.
     • SWITCH FUNDAMENTALS
       • SWITCH COMPLETY UNAWARE OF THE DATE BEING CARRIED
         • THE SWITCH DOESN'T CARE IF IT'S ENCAPSULATED IN A FRAME, IPV4, IPV6, ARP, HTTP, BECAUSE IT'S ALL ENCAPSULATED AS DATA IN THE FRAME.