Lantronix
SM12XPA Web User Guide
33848 Rev. A
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299
of
473
TAS SDU Configuration
This page lets you view and set current TAS SDU parameters. An SDU (Service Data Unit) is a unit of data that has
been passed down from an OSI layer to a lower layer.
A time-triggered scheduling mechanism called Time-Aware Shaper (TAS) is one of IEEE802.1 Standards and has a
parameter called Gate Control List (GCL), to control for each class of stream or traffic.
Figure 18-1.3.2: TAS SDU Configuration
Parameter descriptions
:
Port
: Port number of the switch.
Max SDU Size
: The value of the Maximum SDU size parameter for the traffic class supported by the port.
This value is represented as an unsigned integer in the range 0-10240. A value of 0 is interpreted as the
Maximum SDU size supported by the underlying MAC: 10240. The default value of the Maximum SDU
parameter is 1536.
The Max SDU Size parameter is used to calculate the guard band time = Maximum SDU * 8 / LINK_SPEED (sec).
If frame preemption is enabled and a gate operation is
SetAndHold
, the guard band time in preemptable queues
is automatically selected as the frame preemption minimum fragment size plus 64 bytes.
A queue is said to be preemptible if frame preemption is enabled and if this queue is not opened in a
SetAndHold
gate operation.
Buttons
Apply
: Click to save changes.
Reset
: Click to undo any changes made locally and revert to previously saved values.
