Selecting or Choosing Appropriate Routing Protocol
EIGRP—Enhanced Interior Gateway Routing Protocol
Convergence: Very fast
Protocol Type: Hybrid distance vector
Update Timers: Only when Change occurs
Metric: Delay, bandwidth, reliability, and load, using the Diffusing Update Algorithm (DUAL)
Updates : Only Changes
Classless: Yes
VLSM Support: Yes
Working: Sends hello packets every five seconds to neighbors (can interoperate with IGRP) to see if the neighbors are still available; updates other routers by notifying them only when routes change
Algorithm:DUAL
Update Address: 244.0.0.10
Protocol and Port: IP Protocol and 88
Origin: Based only on Cisco’s implementation, not an Internet RFC
Where to Use: Any network, small to very large; all routers must be Cisco
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