ethernet flow-control config

[LimeHat]

public/release/models/interfaces/openconfig-if-ethernet.yang

Lines 368 to 382 in f46ca2c

	leaf enable-flow-control {
	type boolean;
	default false;
	description
	"Enable or disable flow control for this interface.
	Ethernet flow control is a mechanism by which a receiver
	may send PAUSE frames to a sender to stop transmission for
	a specified time.
	This setting should override auto-negotiated flow control
	settings. If left unspecified, and auto-negotiate is TRUE,
	flow control mode is negotiated with the peer interface.";
	reference
	"IEEE 802.3x";
	}

Currently, enable-flow-control leaf does not specify in which direction the config is applied (tx, rx, or both).

It is common for implementations to support rx/tx granularity, e.g.:

• Arista ref

flowcontrol receive STATE
flowcontrol send STATE

• Cisco ref

# flowcontrol send on
# flowcontrol receive on

• Nokia ref

usage: flow-control
  receive*          When this is true PAUSE frames received on this interface are accepted and processed
  transmit*         Enables/disables the sending of PAUSE frames.

cc @dplore

[dplore]

Agreed, there is precedent to have asymmetric flow control. FYI @atmanmehta (who investigating adding additional support for PFC)

[atmanmehta]

Agreed, there is precedent to have asymmetric flow control. FYI @atmanmehta (who investigating adding additional support for PFC)

Ack. Thanks a lot for the confirmation

[iitrgaurav]

• Juniper ref

usage: configured-flow-control
set configured-flow-control rx-buffers (on | off) tx-buffers (on | off)