30. Eigrp protocol for a particular zone. Terminology of protocol eigrp

EIGRP is commonly referred to as a hybrid routing protocol or an advanced distance-vector routing protocol. EIGRP can be used to route IP, IPX, and AppleTalk traffic. EIGRP uses distance-vector properties to determine the best path to a network, but it uses link-state properties when changes occur or when detecting new neighbors. Some of the main features of EIGRP when used to route IP data are as follows:

• The metric is based on a composite that considers delay, bandwidth, and MTU sizes to ensure the best possible path to any destinations containing dual paths.

• Periodic updates are not sent; only network changes are sent.

• EIGRP can load share up to six paths (The default is four paths, as with OSPF.)

• EIGRP includes support for VLSM.

• EIGRP supports authentication of routing updates.

EIGRP was developed by Cisco to provide support for large IP networks and reduce the convergence time for IP routing updates.

Terminology

EIGRP creates three databases, similarly to OSPF:

• Neighbor Table - Lists all neighbors discovered with which it formed adjacency and exchanged routing information.

• Topology Table - Lists all the paths to all destinations learned. However, it shows only metric and the next-hop router and does not illustrate the real topology like OSPF LSDB.

• Routing Table - The best metric routes are going to be used to send the traffic.