In this lesson, we will explain what is a Multicast MAC Address with an example.
For one MAC address, only the last 23 bits of that MAC address is used to produce this Multicast MAC.The first 25 is fixed. When Host A needs to communicate to Host B at the IP layer, it broadcasts an ARP request for the MAC address associated with IP address IB. Multicast MACs starts with a fised part as 0100:5e. Once G8/2 receives the 11 different MAC address, Interface G8/2 will start ignoring any NEW MAC addresses for 5 minutes while allowing the current MAC addresses to continue passing data frames to/from the switch.Īlso the switch will send a trap to the SNMP server to warn of the issue. Their IP and MAC addresses are shown in parentheses for example, Host A uses IP address IA and MAC address MA. Also the switch will send a trap to the SNMP server to warn of the issue. I am hoping this config on interface G8/2 will accept up to 10 different MAC addresses. Once G8/2 receives the 11 different MAC address, Interface G8/2 will start ignoring any NEW MAC addresses for 5 minutes while allowing the current MAC addresses to continue passing data frames to/from the switch. A (layer2) switch will never actively try to detect the switch port behind which a specific MAC address can be found.
it will forward the frame to each forwarding port in that VLAN except the port from which the frame was received).
I need to VERIFY if the IOS code really performs properly BEFORE I add this setup into my production environment. If the switch does not find the destination MAC address in its MAC address table in the VLAN to which the Frame belongs, it will 'flood' the frame (i.e.