EIGRP

EIGRP (Enhanced Interior Gateway Routing Protocol) is a network protocol that lets routers exchange information over a network.

protocol number - 88 , Multicast Address 224.0.0.10

Multicast Mac Address -  01-00-5E-00-00-0A

What is Distance vector?
You should read my previous post to know what it is.

Why EIGRP is called Distance vector Hybrid?

EIGRP Distance-vector properties include :

·     An EIGRP router only advertises its best route to its neighbour , not every route that is aware of .

Like OSPF has info of the whole topology that’s why Cisco recommends that you not have an OSPF area with more than 90-100 routers.

·      An EIGRP router does not have a complete map of the topology , it is only aware of what its neighbours have told it ( routing by rumour ) Good for organization with large amount of network.

EIGRP Link-state properties :

·         An EIGRP router does form neighbor relationships

·         Triggered updates. An update is only sent when a change in the topology occurs

EIGRP is a classless routing protocol meaning that it will forward it neighbors subnetmask to other neighbors

This bad boy provides load balancing. Could be manipulated in two ways either by changing the metrics or by using Variance.

will talk more about eigrp in the next post.