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You are here: Home / ICND2 / Day 36 – EIGRP / Day 36 Tasks / Split Horizon in EIGRP Networks

Split Horizon in EIGRP Networks

Previously, you learned that split horizon is a Distance Vector protocol feature mandating that routing information cannot be sent back out of the same interface through which it was received. This prevents the re-advertising of information back to the source from which it was learned. While this characteristic is a great loop prevention mechanism, it is also a significant drawback, especially in hub-and-spoke networks. To better understand the drawbacks of this feature, refer to the EIGRP hub-and-spoke network in Figure 36.14 below:

 

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