Dell MX9116n EMC SmartFabric OS10 User Guide Release 10.5.1 - Page 1337

After you configure Deep Buffer mode, the system displays a warning stating that the configuration takes effect only after saving it in the startup configuration and reloading the switch. NOTE: To disable Deep Buffer mode, use the no form of the command. Disabling Deep Buffer mode takes effect only after saving it in the startup configuration and reloading the switch. 2. Save Deep Buffer mode in the startup configuration in EXEC mode. write memory 3. Reload the switch in EXEC mode. reload Configure Deep Buffer mode The configuration shows how to enable Deep Buffer mode in a switch. OS10# configure terminal OS10(config)# hardware deep-buffer-mode % Warning: Deep buffer mode configuration will be applied only after a save and reload. OS10(config)# exit OS10# write memory OS10# reload Proceed to reboot the system? [confirm yes/no]: Y To view Deep Buffer mode status, use the show hardware deep-buffer-mode command. The show command output displays the status of Deep Buffer mode in the current boot and the next boot. The following is Deep Buffer mode status before enabling it, the default setting: OS10# show hardware deep-buffer-mode Deep Buffer Mode Configuration Status Current-boot Settings : Disabled Next-boot Settings : Disabled The following is Deep Buffer mode status after saving the configuration in the startup configuration: OS10# show hardware deep-buffer-mode Deep Buffer Mode Configuration Status Current-boot Settings : Disabled Next-boot Settings : Enabled The following is Deep Buffer mode status after the switch reloads: OS10# show hardware deep-buffer-mode Deep Buffer Mode Configuration Status Current-boot Settings : Enabled Next-boot Settings : Enabled Congestion avoidance Congestion avoidance anticipates and takes necessary actions to avoid congestion. The following mechanisms avoid congestion: ● Tail drop-Packets are buffered at traffic queues. When the buffers are exhausted or reach the configured threshold, excess packets drop. By default, OS10 uses tail drop for congestion avoidance. ● Random early detection (RED)-In tail drop, different flows are not considered in buffer utilization. When multiple hosts start retransmission, tail drop causes TCP global re-synchronization. Instead of waiting for the queue to get filled up completely, RED starts dropping excess packets with a certain drop-probability when the average queue length exceeds the Quality of service 1337