AAA functionality in Cisco switch can be used as a centralized solution to secure and control user access to switches. Cisco switches are capable of implementing AAA functionality with either TACACS+ protocol (Cisco proprietary) or RADIUS protocol. To use AAA you need to enable it and then connect it to an AAA service hosted in a server. [Read more…]
VRRP or virtual router redundancy protocol provides router or switch interfaces failover and failback facility for seamless operation of a network. VRRP almost similar to HSRP in terms of operations and functions, but with a few added features such as VRRP supports up to 255 groups.
Just like HSRP, VRRP also support a number of routers to form a virtual group which acts like a single router. Every access request send to the virtual IP is responded regardless of the fact which router is in active mode. In VRRP only one router will remain active to forward all the traffic send to its Virtual IP address, and there will be one standby router and several candidate routers. In case of the active router failure or its interface failure, the role of active router will be shifted to the sandy router. And when the active router will be back in operation it will resume its responsibility as an active router. [Read more…]