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Description:
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esrPortFlowControlMode OBJECT-TYPE
SYNTAX INTEGER {
enable(1),
disable(2),
enable-with-aggressive-backoff(3),
enable-send-only(4),
enable-respond-only(5)
}
ACCESS read-write
STATUS mandatory
DESCRIPTION
"Flow control is used to prevent or reduce the dropping of frames due to
the lack of buffer space. Overall, networks are more efficient when a
sending station is asked to pause in its sending process, rather than having
the transmitted frames dropped.
Flow control is not as efficient when used in conjunction with a shared
ports, i.e. when used with a repeater. Therefore, flow control is not
recommended for a port connected to shared topologies.
Flow control is most effective when the port is directly connected to an
end-station, especially when connected to a server. Flow control is
recommended for ports connected directly to end-stations.
When the port is in half-duplex mode, back pressure is used to control
the incoming flow. Back pressure essentially forces collisions for short
periods of time.
When the port is in full-duplex mode, IEEE 802.3 standard pause frames
are used to control the incoming flow.
Note that setting an ether-gigabit(4) port to enable-with-aggressive-backoff(3)
results in an error."
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