cisco ccna 200-301 cbt nuggets

cisco ccna 200-301 cbt nuggets.EIGRP is a Cisco-specific routing protocol that builds on top of IGRP. Improvements made to EIGRP include: fast convergence, loop-free topology, route summarization, multicast and incremental updates, and support for IP, IPX, and AppleTalk. to establish and maintain adjacencies, a Hello message is sent as a multicast every 5 seconds. EIGRP uses metrics that include components such as bandwidth, latency, reliability, load, and MTU.The DUAL algorithm is used to provide a loop-free topology. This algorithm stores neighbor routing information in a local topology table, making convergence very fast. The best path is called a successor route and the valid alternative path is called a feasible successor route. The notification distance is the metric from the neighbor to the destination network, while the feasible distance is the metric from the current router to the destination network. There are five types of EIGRP messages: hello. update. query. answer. and acknowledge.Enabling EIGRP is easy: just specify the AS number with the command router and the directly connected network number with the command network. The command showipeigrpneighbors displays the neighbors and the problems encountered when establishing adjacencies with other EIGRP routers. The command showip eigrptopology displays the topology table used by the DUAL algorithm to create the routing table. In the IP routing table, use D for EIGRP routes.Chapter 20 EIGRP Routing 54320.6 Two-Minute SprintsOverview of EIGRP .. EIGRP is based on IGRP,a hybrid protocol with many of the features of link-state protocols: fast convergence; provides a loop-free topology; supports route summarization and VLSM; and uses multicast and incremental updates.. EIGRP uses bandwidth and delay to calculate metrics by default, but can also use reliability, load, and MTUo. EIGRP sends a Hello multicast ( 224.0.0.10) message outbound every 5 seconds on the interface. To establish an adjacency, both EIGRP routers must have the same AS number and K value.. EIGRP uses the DUAL algorithm to maintain the topology table and to update the routing table. A successor route is the best path to the destination network; a feasible successor route is a valid alternate route (not part of a routing loop). Notification distance is the distance to the target network from a neighbor; feasible distance is the distance to the target network from the current router.