![]() ![]() You can use port security with dynamically learned and static MAC addresses to restrict a port’s ingress traffic by limiting the MAC addresses that are allowed to send traffic into the port. Port Security with Dynamically Learned and Static MAC Addresses: Alternatively, you can use port security to filter traffic that is destined to or received from a specific host that is based on the host MAC address. You can use port security to block input to an Ethernet, Fast Ethernet, or Gigabit Ethernet port when the MAC address of the station attempting to access the port is different from any of the MAC addresses that are specified for that port. Get my ICND1 and ICND2 courses for $10 here: (you will get ICND2 as a free bonus when you buy the ICND1 course).įor lots more content, visit – learn about GNS3, CCNA, Packet Tracer, Python, Ansible and much, much more. NOTE From Cisco NX-OS Release 7.1(4)N1(1), if the port security feature is disabled on one of the vPC peers of a vPC port, the sticky or dynamic secure MAC addresses are deleted on both the vPC peers configured for the vPC port.Get the Packet Tracer course for only $10 by clicking here: You configure the interface to act as a Layer 3 interface. ![]() From Cisco NX-OS Release 7.1(4)N1(1), if the port security feature is disabled on an interface, then all the sticky secured MAC addresses on it are removed.You explicitly remove the sticky MAC address configuration from the interface.A sticky secure MAC address entry remains secured on an interface until one of the following events occurs: If you disable sticky learning, the device resumes dynamic learning. When you enable sticky learning on an interface, the device stops dynamic learning and performs sticky learning instead. Dynamic and sticky address learning are mutually exclusive. Sticky secure MAC addresses do not appear in the running configuration of an interface. As a result, addresses learned by the sticky method persist through a device restart. If you enable the sticky method, the device secures MAC addresses in the same manner as dynamic address learning, but the device stores addresses learned by this method in nonvolatile RAM (NVRAM). ![]()
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