S1(config-if)# switchport port-security mac-address aaaa.bbbb. S1(config-if)# switchport port-security maximum 2 *Mar 1 00:12:39.194: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to upĮnter configuration commands, one per line. *Mar 1 00:12:38.179: %LINK-3-UPDOWN: Interface FastEthernet0/1, changed state to up Use the show port-security interface and the show port-security address command to verify the configuration.
The administrator specifies a maximum of 2 MAC addresses, manually configures one secure MAC address, and then configures the port to dynamically learn additional secure MAC addresses up to the 2 secure MAC address maximum. The following example demonstrates a complete port security configuration for FastEthernet 0/1 with a host connected to port Fa0/1. Saving the running configuration will commit the dynamically learned MAC address to NVRAM. The administrator can enable the switch to dynamically learn the MAC address and “stick” them to the running configuration by using the following command: Switch(config-if)# switchport port-security mac-address sticky If the switch is rebooted, the port will have to re-learn the device’s MAC address. When the switchport port-security command is entered, the current source MAC for the device connected to the port is automatically secured but is not added to the startup configuration. The administrator manually configures a static MAC address(es) by using the following command for each secure MAC address on the port: Switch(config-if)# switchport port-security mac-address mac-address
The switch can be configured to learn about MAC addresses on a secure port in one of three ways: S1(config-if)# switchport port-security maximum S1(config-if)# switchport port-security maximum ? BGP EVPN feature address family sends the host MAC, IP, network, VRF. The maximum number of secure MAC addresses that can be configured depends the switch and the IOS. In this chapter, I am going to show how the VXLAN Flood & Learn mac learning. To set the maximum number of MAC addresses allowed on a port, use the following command: Switch(config-if)# switchport port-security maximum value
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