* Critical (Red): events that impair overlay network function
* Major (Yellow): events that might impair performance of network
* Medium (Blue): events that affect operation of network function
* Minor (Green): events that might diminish performance of network
* Critical (Red): These are the highest severity alarms indicating events that can cause significant impairment to the overlay network's functionality. Immediate attention is required to prevent major network issues.
* Major (Yellow): These alarms indicate events that could potentially impair network performance. They are serious but not as critical as red alarms. They need prompt attention to prevent degradation in network performance.
* Medium (Blue): These alarms are of medium severity and indicate events that affect the operation of the network function. They are important but do not require immediate action.
* Minor (Green): These are the lowest severity alarms and indicate events that might diminish network performance. They are more informational and do not typically require urgent action.

Cisco TrustSec (CTS) is a technology that enables secure access and dynamic role-based access control in the network. The Security Group Tag (SGT) Exchange Protocol (SXP) is used to propagate SGTs across network devices. To ensure the secure exchange of these tags, Cisco uses encryption algorithms.
* AES (Advanced Encryption Standard): AES is widely used in many security protocols and standards because of its strong encryption capabilities. In the context of Cisco TrustSec, AES is the encryption algorithm used to secure binding exchanges between SXP peers. It provides robust encryption, ensuring the integrity and confidentiality of the data being exchanged.
* Implementation: When configuring SXP peers, the AES encryption ensures that the SGT information transmitted is secure and cannot be intercepted or tampered with by unauthorized entities.