Dell EMC SmartFabric OS10 User Guide Release 10.5.1

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Deep Buffer mode

NOTE: This feature is supported only on the S4200-ON series.

OS10 provides the flexibility to configure the buffer mode based on your system requirements.

The S4200-ON series switch comes with a default deep buffer size of 4.63 GB. You can use the hardware deep-buffer-mode command to enhance the deep buffer size to 6.24 GB. For information about how to configure deep buffer mode, see Configure Deep Buffer mode. The following lists the total buffer availability in the different modes:

Table 1. Buffer availability in different modesBuffer availability in different modes
Platform	Default deep buffer	Enhanced deep buffer
S4200–ON series	4.63 GB	6.24 GB

Deep Buffer mode takes effect only after saving it in the startup configuration and reloading the switch.

NOTE: Disabling the Deep Buffer mode configuration during runtime is not supported.

Configuration notes

When the switch is in Deep Buffer mode, the PFC and LLFC features are not available. The following commands are not supported:
- priority-flow-control mode on—Configure Priority Flow Control mode on an interface.
- service-policy input type network-qos policy-name—Apply a network service policy on an interface.
- flowcontrol transmit on—Configure flow control transmit.
- pfc-max-buffer-size size—Configure maximum buffer size for PFC.
- pfc-shared-buffer-size size—Configure shared buffer size for PFC.
NOTE: To view the PFC, LLFC, or service policy configured on the interfaces, use show running-configuration command. Use interface range command to disable network QoS-related configurations before enabling Deep Buffer mode.
The other QoS features such as traffic classification, policing, marking, shaping, priority queuing, and scheduling are supported in Deep Buffer mode.