EIGRP Individual Learning Notes

" Management on the part of "

1 eigrp main features:

& nbsp;  cisco proprietary protocol ( advanced DV route )

② support VLSM;

③ trigger, incremental update; --------- reduce the bandwidth footprint

a ppll E t a lk , IP and Nove ll n Etware and other protocols;

& nbsp;  ⑤ convergence speed; - ----- ---- with dual algorithm implementation

⑥ Support LAN and the WAN , 100% No loop ;

2 , EIGRP the three- sheet :

Neighbor table	through Hello The package establishes the information of the neighbor relationship
Topology table	Neighbor Router announces reach destination network
Routing table	storage for the destination network Best Routing

3 , EIGRP Related Terms

AD: is the neighbor router to the destination network segment Cost

FD: the router to the destination network segment Cost

successor: to the target network FD the smallest neighbor router , the path is the best;

feasible successor; do backup, sub-optimal path of the next router;

to becomeFSCondition: The next-hop router goes to a specific networkADless than the current best routeFD(This ensures no ring, becauseFSGetADis less than the current router'sFD)

4 , EIGRP of the 5 types of seed packs

① Hello used to discover neighbor relationships, to be sent in multicast, without confirmation;

update after discovering new routing information, send it as multicast; Synchronize the topology table to send as a single advertisement

query fs can by

replay query Span style= "font-family: ' The song body '; color: #000000; font-size:16px;" >, send reliable )

⑤ ACK used to confirm Update,query and the Replay

5 , calculation eigrp Metric

five parameters: BW delay reliability Span style= "font-family: ' The song body '; font-size:16px;" >, loading , mtu

k default k1=k3=1 k2=k4=k5=0 ,

Metric calculation formula for values : that is, the measure value = Bandwidth + Delay

Metric= (107/BW+DELAY/10) *256

bw= delay= update inbound interface delay sum along the way

Note: In the calculation 107/BW if a decimal is to be rounded, for example: 19.9=19 , 19.1=19

Show IP eigrp Neighbors

Show IP Route eigrp

Show IP Protocols

Show IP EIGRP Interfaces

Show IP eigrp topology

Show IP EIGRP Traffic

This article from "Haw Hum" blog, declined reprint!

EIGRP Individual Learning Notes