Guidelines and limitations for link level flow control
LLFC includes specific configuration guidelines and limitations:
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Ethernet interfaces do not auto detect the LLFC capability. LLFC must be configured explicitly.
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Enabling LLFC requires a part of the buffer to be reserved. This reservation reduces the available shared buffer space.
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Configuration time quanta of the pause frames is not supported.
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On each Ethernet interface, the switch can enable either Priority Flow Control (PFC) or LLFC, but not both. For more information , see PFC.
Note
When both PFC and LLFC are enabled, LLFC is selected.