CLI Guide

tx off Enter the keywords tx off so that flow control frames are
not sent from this port to the connected device when a
higher rate of traffic is received.
pause-threshold Enter the buffer threshold limit for generating PAUSE
frames.
resume-offset Enter the offset value for generating PAUSE frames to
resume traffic.
Defaults
Command Modes INTERFACE
Command History
This guide is platform-specific. For command information about other platforms,
see the relevant Dell Networking OS Command Line Reference Guide.
Version Description
9.8(1.0) Introduced on the Z9100–ON.
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.7(0.0) Introduced on the S6000-ON.
9.2(1.0) Introduced on the Z9500.
9.0.2.0 Introduced on the S6000.
8.3.19.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
8.3.7.0 Introduced on the S4810.
8.1.1.0 Introduced on the E-Series.
6.5.1.9 and 7.4.1.0 Introduced on the E-Series.
7.8.1.0 Introduced on the C-Series and S-Series with the
thresholds option.
Usage Information
The globally assigned 48-bit Multicast address 01-80-C2-00-00-01 is used to send
and receive pause frames. To allow full-duplex flow control, stations implementing
the pause operation instruct the MAC to enable the reception of frames with a
destination address equal to this multicast address.
When a port receives traffic at a higher rate than it can process, the frames are
stored in the port buffer. As a result, buffer usage increases. When the buffer usage
reaches the value specified in the “pause-threshold” argument, the port sends
PAUSE frame to the connected link partner to stop sending the traffic. Eventually
this reduces the buffer usage. When the buffer usage drops by the value specified
in the “resume-threshold”, the port again sends a PAUSE frame with 0 as wait-time.
This results in resume of the paused traffic flow.
Interfaces
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