![]() MacSec is an L2 encryption technology described in IEEE 802.1AE standard. MACsec secures the data on physical media, and makes it impossible for data to be compromised at higher layers. Some of the common breaches at Layer 2 are sniffing, packet eavesdropping, tampering, injection, MAC address spoofing, ARP spoofing, Denial of Service (DoS) attacks against a DHCP server, and VLAN hopping. Background InformationĬlear text data communication is susceptible to security threats. Security breaches can occur at any layer of the OSI model. Note: Consult the appropriate configuration guide for the commands that are used in order to enable these features on other Cisco platforms. If your network is live, ensure that you understand the potential impact of any command. ![]() All of the devices used in this document started with a cleared (default) configuration. The information in this document was created from the devices in a specific lab environment. There are no specific requirements for this document. This document describes the MACsec feature, its use cases, and how to troubleshoot the feature on Catalyst 9000 switches. Scope of this document is MACsec on LAN, between two switches/routers.
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