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CCNA Data Center DCICN 200-150 Official Cert Guide by Ozden Karakok, Cesar Obediente, Chad Hintz

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Slow Drain Device Detection and Congestion Avoidance

This feature provides various enhancements to detect slow drain devices that are causing congestion in the network and also provides a congestion avoidance function. It is focused mainly on the edge ports that are connected to slow drain devices. The goal is to avoid or minimize the frames being stuck in the edge ports due to slow drain devices that are causing ISL blockage. To avoid or minimize the stuck condition, configure a lesser frame timeout for the ports. No-credit timeout drops all packets after the slow drain is detected using the configured thresholds. The lesser frame timeout value helps to alleviate the slow drain condition that affects the fabric by dropping the packets on the ...

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