Hardware the MAC address of the host with the corresponding IP address. Syntax may vary between platforms, but in general to clear a given address youd run clear mac address-table dynamic address. Notification Clear MAC notification Global CountersĪs there's no dynamic entries on that interface the mac addresses remain on the f0/19 interface. Each time an entry is used, the age will be reset back to zero.
As a practice, try issuing command ipconfig /all on Windows CLI and show mac address-table on Cisco switch CLI to get warmed up for later examples. The table is built dynamically from the source address of received frames, and can also be populated with static entries by the user. In this way, a switch dynamically builds an address table by using the source MAC address of the frames received. The mac-address-table is used by the switch for layer 2 forwarding. Depending on what your issue is and what you are attempting to accomplish it may be advisable to clear one or the other, or even perhaps both. I was searching to clear the mac address table on that interface but the IOS version didn't give me the static option The switch and mux of the Cisco Nexus 3550-F Fusion (formerly ExaLINK Fusion) makes use of a MAC address table. The mac-address-table and the arp cache are quite separate and distinct. With a Polycom SoundPoint IP 330 connected on vlan 80 When I issue the 'show spanning-tree vlan 12' on SW1, I get the following output My confusion comes from the fact that the MAC address shown (0009.e828.2300) is the MAC address for the SVI for vlan 15 on SW2. Sw02#show mac address-table interface f0/19 To clear the dynamic (learned) MAC entries from the MAC address table, the specific interface, or the specific VLAN, use the command clear mac address-table. Enable all trunk ports on the root bridge and note the new STP election results. Use the mac address-table static command to create a static entry.
Let’s turn this into a static entry: SW1 (config)mac address-table static 001d.a18b.36d0 vlan 1 interface fastEthernet 0/1. Although I was figuring out what's wrong and seems that the mac address is kept for some reason in the first port. Here’s the MAC address of R1, learned dynamically. When I connect a laptop on that port, the mac address is learned by the switch and keep the mac address even if I disconnect the ethernet cable from that port and if I try to connect the same laptop on other port on the same switch I've got errdisable error in the last connected port.
I'm facing a problem, and i've also tried to workaround but not sucessfully.