EIGRP: Graceful Shutdown

When an EIGRP router goes offline for instance when the power goes out, other EIGRP neighbors must wait for the holddown timer to begin any sort of convergence on the network event.

EIGRP routers configured for graceful shutdown however, when they’re shutdown will send a Goodbye message to let other neighbors know it’s going down so they don’t have to wait on the holddown timer.

A Goodbye message is simply a standard Hello message with all K values set to 255

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