“TACACS+ is an Authentication, Authorization, and Accounting (AAA) protocol originally developed for the U.S. Department of Defense for authentication to network devices such as routers, switches, and firewalls. Unlike RADIUS, it separates the Authentication and Authorization functionalities, which makes it more flexible for administrative access. The current version of the protocol standard was developed by […]
Tag: Cisco
Cisco MAC Address Flapping Causing High CPU Utilization
A MAC flap is caused when a switch receives packets from two different physical/logical interfaces with the same source MAC address. The switch then learns where the MAC address is and puts in to a table. This table has the physical/logical interface and the MAC address. When flapping occurs it causes this table to be […]
SNMP v3 + Cisco IOS Crash Course
SNMPv3 allows for authentication and encryption (AES, DES, 3-DES) for managing core routers and switches. CiscoWorks LAN Manager Solution (LMS) requires SNMPv3 to be enabled and setup correctly for doing port VLAN tagging and a various other features through the LMS web interface. Here is a simple crash course on setting up SNMPv3 on an […]