EIGRP Split Horizon
The objective of this lab exercise is for you to learn and understand the effects of Split Horizon in a typical hub and spoke topology.
Configuring and troubleshooting Split Horizon is a fundamental skill. EIGRP is an advanced Distance Vector protocol, and as such uses Split Horizon to prevent routing loops. Split Horizon mandates that EIGRP will not send updates back out of the interface on which they were received. While this default feature is generally a good thing, it can have a disastrous effect on traditional hub and spoke topologies . . .
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