If you're interested in finding out which MAC address belongs to which device, you can look up the OUI of MAC addresses in your output. MAC addresses will be learned on every layer 2 device between the source and destination devices. To two other switches), why are there two, and not one, mac addressesīecause it's a Layer 2 network. You can use port security to define which MAC addresses should be seen on specific ports.ĭynamic mac addresses (interface 1 and 24, which I have connected out Static mac addresses configured by port security feature? Orange highlighted part of the textbook passage, what is meant by Tree (PVST, each instance has its ' own mac address)). On the 4/5/6x00 devices, there are 1024 mac addressesĪssigned to the upervisor (1 or more for the switch, 1000 for spanning Manufactures switches, they use 1 mac address for all functions, Ciscoĭoes not. Switch) and spanning tree (to form the bridge ID). Yes, the first four MAC addresses belong to the switch itself.įor L2 switches, there are mac addresses for different functions (toīe able to communicate (when we want to telnet, ping or do snmp to the This is the case when a hub or switch with manyĪm I correct in thinking that static MAC address are the mac addresses You can have frames from many different hosts (MAC addresses) come.Only allowing traffic destined to a MAC address through a manuallyĬonfigured port will help prevent ARP spoofing problems.The switch will automtically have static entries for itself. The table is dynamic and when a frame with a source MACĪddress comes into a switch the table is updated to reflect that theĭevice with that MAC address is out that port. The dynamic entries in the MAC address table will time out afterĪ while. Static MAC addresses in the MAC address table were manuallyĬonfigured.The MAC addresses are from hosts connected to the ports. To which port it should send frames with that destination MACĪddress. Which have come into a port with the port. A shorter aging time makes the switch more sensitive to network changes and is applicable to networks where network topology changes frequently. The MAC address table relates the source MAC addresses for frames Therefore, the aging time needs to be set properly for dynamic MAC address entries so that the switch can delete unneeded MAC address entries to prevent a sharp increase of MAC address entries.
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