how to show mac address table on cisco switch

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History Index 0, Entry Timestamp 348747, Despatch Timestamp 348747 show mac address-table address

would work, or if you dont know the exact mac address, just show mac address-table inc .

Maximum Number of entries configured in History Table : 1 Interval between Notification Traps : 1 secs MAC Notification Feature is Enabled on the switch Rack1SW2#show mac-address-table notification Rack1SW2#clear mac-address-table dynamic interface fa0/24 Verify SNMP MAC Address logging configuration: These traps are then forwarded to an NMS station located at 187.1.3.100 using the community string CISCOTRAP. Then, these traps are selectively enabled on a per-interface basis by issuing the snmp trap mac-notifications interface level command. To enable SNMP trapping when a MAC address is added or removed from the CAM table, issue the global configuration commands mac-address-table notification and snmp-server enable traps MAC-Notification. Snmp-server host 187.1.3.100 CISCOTRAP MAC-Notification Snmp-server enable traps MAC-Notification The network management server will be expecting community-string to be CISCOTRAP.You could then decide, based on your network, if said ports are connected to a switch or end device. It shows all the dynamically learned MACs and the ports they were learned on.

• In order to help track down this device in the future configure SW2 to notify the network management station at 187.X.3.100 whenever a new MAC address is learned in VLAN 28. You can get some intel on it with the command show mac-address-table vlan . how to show mac address table on cisco switch

After checking the MAC address tables of SW1 and SW2 you have determined that the notebook computer is not currently plugged into the network. The switch sees the MAC address of PC-D in the incoming frame on port 4. In Figure 7-17, PC-D is replying to PC-A.

A recent security breach which involved the compromising of the company’s future business plans was tracked down to a notebook computer that was located in VLAN 28 with a MAC address of 0001.02ac.9ab2. When the MAC address table of the switch contains the destination MAC address, the switch is able to filter the frame and forward out a single port.

Logging MAC addresses Augat 11:44 am | Posted in IOS services | 4 Comments

How to show mac address table on cisco switch