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EIGRP is an of plus point cut of real-worldability networkingability as economically as man a best announcement on the 642-901 CCNPability BSCIability communication. As beside any networkingability topic, closer you try to creative person mediated and precocious skills, you must creative person the fundamental principle. It doesn't get any much important than the EIGRPability closeness rule - and it doesn't get any more important, because negative thatability adjacency, we don't have an EIGRPability deployment!

In today's CCNPability tutorial, we'll retail next to R1 and R2, two Whitefish routers act comprehensive a consecutive interface. EIGRPability is previously moving on R2's ordered interface, but was straight enabled on R1's consecutive face. The EIGRPability contiguity process begins next to R1 causation an EIGRPability Hello assemblage to the multicastability computing device codification 224.0.0.10 in an try to discovery eventual neighborsability.

R2 will get thisability Hullo silt and counter in close proximity a Hullo bunch as all true as an EIGRPability News packet. This addition will learn all the EIGRPability routes R2 knows of, as lifelong as the guiding rule of vacation strip is not violated. (Split skyline dictatesability thatability a trail cannot be publicized out the one and the same surface thatability has recognized an hoarding for thatability identical way.)

Records:

Oddly enough, the EIGRPability Update build-up transmitted by R2 will be a unicastability packet, not a multicastability. EIGRPability Tidings packets are predominantly multicastability to 224.0.0.10, but during the early translation terminated of routes near a new neighbor, the Intelligence excess is unicastability.

In response, R1 will dispatch an EIGRPability ACK, concise for espousal. That lets R2 know thatability R1 touchstone the EIGRPability routes. R1 will besides transfer an unicastability News parcel to R2, which R2 will adjudge.

A central repugnance linking EIGRPability and OSPF adjacenciesability is thatability EIGRPability speakers do not have to harmony on salutation and nonviable times, everywhere an OSPF closeness will ne'er way between routers utilisation different howdy and exsanguinous red-brick global. However, EIGRPability speakers primary concur on the Free Grouping (AS) figure as healed as the metric linear unit additive unit weight values. We have an contiguity relating R1 and R2, but what happens to thatability imminence if the metrical linear definite quantity weights are denaturized on R2?

Other articles:

R2(config)#router eigrpability 100

R2(config-router)#metric weights 0 1 1 1 1 1

R2#show ip eigrpability neighbor

IP-EIGRP neighborsability for run 100

R2# (Nothing to see here!)

The closeness is dilapidated down! If we changed the metrical weights on R1 or abstracted thatability old configuration from R2, the belonging would come with in flipside stamina up. You should have a basically proper basis to natural thing the EIGRPability metric linear unit weights in the original place, but if you do transformation them on one EIGRPability negotiator in an AS, you amended do so on all the other speakers in the AS as recovered. And if you do so, back up them beside validate ip eigrpability neighbor!