MAC Address learning process

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3















Does a switch learns hosts mac address in these following scenarios:



  • Switch port configured as access and frames received tagged on different VLAN

  • Switch port configured as trunk and frames received tagged on non authorized trunk VLAN

  • Switch port configured as trunk without native VLAN and frames received not tagged

  • Switch port not configured (default), and frames received

And more global question, are these generals rules or does it depends of the vendors ?










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    3















    Does a switch learns hosts mac address in these following scenarios:



    • Switch port configured as access and frames received tagged on different VLAN

    • Switch port configured as trunk and frames received tagged on non authorized trunk VLAN

    • Switch port configured as trunk without native VLAN and frames received not tagged

    • Switch port not configured (default), and frames received

    And more global question, are these generals rules or does it depends of the vendors ?










    share|improve this question


























      3












      3








      3








      Does a switch learns hosts mac address in these following scenarios:



      • Switch port configured as access and frames received tagged on different VLAN

      • Switch port configured as trunk and frames received tagged on non authorized trunk VLAN

      • Switch port configured as trunk without native VLAN and frames received not tagged

      • Switch port not configured (default), and frames received

      And more global question, are these generals rules or does it depends of the vendors ?










      share|improve this question
















      Does a switch learns hosts mac address in these following scenarios:



      • Switch port configured as access and frames received tagged on different VLAN

      • Switch port configured as trunk and frames received tagged on non authorized trunk VLAN

      • Switch port configured as trunk without native VLAN and frames received not tagged

      • Switch port not configured (default), and frames received

      And more global question, are these generals rules or does it depends of the vendors ?







      cisco switch vlan switching switchport






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Feb 28 at 15:28









      Cown

      6,65331031




      6,65331031










      asked Feb 28 at 14:39









      bdes31bdes31

      54019




      54019




















          1 Answer
          1






          active

          oldest

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          9














          It depends on the manufacturer. For Cisco switches:




          Switch port configured as access and frames received tagged on
          different VLAN




          Frame is dropped




          Switch port configured as trunk and frames received
          tagged on non authorized trunk VLAN




          Frame is dropped




          Switch port configured as trunk
          without native VLAN and frames received not tagged




          Frame is dropped




          Switch port not
          configured (default), and frames received




          The default configuration is access port on VLAN 1, so frame will be accepted and the switch will learn the MAC address.






          share|improve this answer























          • Thanks. You confirm there are systematically no mac address learning in case of frames dropping ?

            – bdes31
            Feb 28 at 14:59











          • @bdes31 When ingress frames are dropped due to an unauthorized VLAN ID, no MAC address is learned from them. Since the port isn't part of the VLAN anyway it wouldn't make sense to learn the MAC but not forward frames there.

            – Zac67
            Feb 28 at 15:35











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          1 Answer
          1






          active

          oldest

          votes








          1 Answer
          1






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes









          9














          It depends on the manufacturer. For Cisco switches:




          Switch port configured as access and frames received tagged on
          different VLAN




          Frame is dropped




          Switch port configured as trunk and frames received
          tagged on non authorized trunk VLAN




          Frame is dropped




          Switch port configured as trunk
          without native VLAN and frames received not tagged




          Frame is dropped




          Switch port not
          configured (default), and frames received




          The default configuration is access port on VLAN 1, so frame will be accepted and the switch will learn the MAC address.






          share|improve this answer























          • Thanks. You confirm there are systematically no mac address learning in case of frames dropping ?

            – bdes31
            Feb 28 at 14:59











          • @bdes31 When ingress frames are dropped due to an unauthorized VLAN ID, no MAC address is learned from them. Since the port isn't part of the VLAN anyway it wouldn't make sense to learn the MAC but not forward frames there.

            – Zac67
            Feb 28 at 15:35
















          9














          It depends on the manufacturer. For Cisco switches:




          Switch port configured as access and frames received tagged on
          different VLAN




          Frame is dropped




          Switch port configured as trunk and frames received
          tagged on non authorized trunk VLAN




          Frame is dropped




          Switch port configured as trunk
          without native VLAN and frames received not tagged




          Frame is dropped




          Switch port not
          configured (default), and frames received




          The default configuration is access port on VLAN 1, so frame will be accepted and the switch will learn the MAC address.






          share|improve this answer























          • Thanks. You confirm there are systematically no mac address learning in case of frames dropping ?

            – bdes31
            Feb 28 at 14:59











          • @bdes31 When ingress frames are dropped due to an unauthorized VLAN ID, no MAC address is learned from them. Since the port isn't part of the VLAN anyway it wouldn't make sense to learn the MAC but not forward frames there.

            – Zac67
            Feb 28 at 15:35














          9












          9








          9







          It depends on the manufacturer. For Cisco switches:




          Switch port configured as access and frames received tagged on
          different VLAN




          Frame is dropped




          Switch port configured as trunk and frames received
          tagged on non authorized trunk VLAN




          Frame is dropped




          Switch port configured as trunk
          without native VLAN and frames received not tagged




          Frame is dropped




          Switch port not
          configured (default), and frames received




          The default configuration is access port on VLAN 1, so frame will be accepted and the switch will learn the MAC address.






          share|improve this answer













          It depends on the manufacturer. For Cisco switches:




          Switch port configured as access and frames received tagged on
          different VLAN




          Frame is dropped




          Switch port configured as trunk and frames received
          tagged on non authorized trunk VLAN




          Frame is dropped




          Switch port configured as trunk
          without native VLAN and frames received not tagged




          Frame is dropped




          Switch port not
          configured (default), and frames received




          The default configuration is access port on VLAN 1, so frame will be accepted and the switch will learn the MAC address.







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Feb 28 at 14:45









          Ron TrunkRon Trunk

          39.2k33780




          39.2k33780












          • Thanks. You confirm there are systematically no mac address learning in case of frames dropping ?

            – bdes31
            Feb 28 at 14:59











          • @bdes31 When ingress frames are dropped due to an unauthorized VLAN ID, no MAC address is learned from them. Since the port isn't part of the VLAN anyway it wouldn't make sense to learn the MAC but not forward frames there.

            – Zac67
            Feb 28 at 15:35


















          • Thanks. You confirm there are systematically no mac address learning in case of frames dropping ?

            – bdes31
            Feb 28 at 14:59











          • @bdes31 When ingress frames are dropped due to an unauthorized VLAN ID, no MAC address is learned from them. Since the port isn't part of the VLAN anyway it wouldn't make sense to learn the MAC but not forward frames there.

            – Zac67
            Feb 28 at 15:35

















          Thanks. You confirm there are systematically no mac address learning in case of frames dropping ?

          – bdes31
          Feb 28 at 14:59





          Thanks. You confirm there are systematically no mac address learning in case of frames dropping ?

          – bdes31
          Feb 28 at 14:59













          @bdes31 When ingress frames are dropped due to an unauthorized VLAN ID, no MAC address is learned from them. Since the port isn't part of the VLAN anyway it wouldn't make sense to learn the MAC but not forward frames there.

          – Zac67
          Feb 28 at 15:35






          @bdes31 When ingress frames are dropped due to an unauthorized VLAN ID, no MAC address is learned from them. Since the port isn't part of the VLAN anyway it wouldn't make sense to learn the MAC but not forward frames there.

          – Zac67
          Feb 28 at 15:35


















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