Cisco CCNP Certification BSCI 642-901 Exam Training: The EIGRP Adjacency

Eigrp is an important part of the real world networking as well as a major topic at 642-901 ccnp bsci exam. As is the case for any subject of networking, you try to perfect the intermediate and advanced skills, you must master the basics. It does not get any more fundamental than eigrp Adjacency process - it does not get any more important, because without this proximity, and we have no eigrp publishing!
in ccnp day of the lesson, we will work with Rand and R2, two tracks Cisco contact over the serial interface. Eigrp still seeks to R2 series of interaction, but that was just the rand enabled serial interaction. Eigrp Adjacency begin the process of sending R1 eigrp Hello multicast packet to the address 224.0.0.10 in an attempt to find a potential neighbors.
r2 will receive this packet Hello and welcome to respond with a packet also eigrp update ton. This packet will contain all eigrp ways R2 know, as long as the rule does not violate Split horizon. (Split horizon dictates that the road can not declare himself a link that happened to the declaration that the same road).
oddly including enough, eigrp update packet across R2 will unicast packet, and not multicast. Eigrp update packaging generally 224.0.0.10 multicast, but during the first meeting for the exchange of new ways with the neighbors, and update packet unicast.
in response, Rand will send eigrp recognizes, in order to recognize short. To acknowledge that the R2 know that the Rand received eigrp roads. Rand will also send a packet of unicast updating R2, R2, which will acknowledge.
a big difference between eigrp and ospf adjacencies eigrp is that the speakers do not have to agree on Hello, dead times, where ospf proximity between form and will begin using different paths Hello, dead times. However, eigrp speakers agreed that the system of self-rule (as), as well as the number of metric weight values. We have the proximity between the rand and R2, but what happens if this Adjacency metric weights changed R2?
r2 (composition) path eigrp 100
r2 (Training - track) metric weights 0 1 1 1 1 1
r2 show IP eigrp Neighbor
ip - eigrp neighbors to the process 100
r2 (see anything here!)
the Adjacency is demolished! If others metric weights on the rand or removed reshuffle last R2, will be adjacent. You should have a very good reason to change the weights eigrp metric, in the first place, but if you do change it in one eigrp speaker in the way, I prefer to do so at all the other speakers as well. If you do so, and check them show IP eigrp neighbor!



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