Lantronix
SM12XPA Web User Guide
33848 Rev. A
Page
297
of
473
TAS Configuration Parameters
Ports
A time-triggered scheduling mechanism called a Time-Aware Shaper (TAS) is an IEEE802.1 Standard. TAS uses a
parameter called a Gate Control List (GCL) to control for each class of stream or traffic. QoS will be degraded if
TAS does not use an appropriate value of the GCL. See
https://ieeexplore.ieee.org/document/9292023
Figure 18-1.3.1: TAS Configuration Parameters
Parameter descriptions
:
Always Guard Band option
: This option defines how the guard band values are calculated:
If a Gate Control List does not contain
SetAndHold
and/or
SetAndRelease
operations the Always Guard
Band option has no effect.
If a Gate Control List does contain
SetAndHold
and
SetAndRelease
operations, then:
When Always Guard Band is Enabled, a guard band is implemented on all queues, both Express
and Preemptible queues. The default is Enabled.
When Always Guard Band is Disabled, a guard band is only implemented on Preemptible
queues.
TAS Port Configuration Parameters
Port
: Port number of the switch.
Gate
Enabled : The Enabled parameter determines whether traffic scheduling is active (true) or inactive (false).
Gate
States
: The initial value of the port open states that is used when no Gate Control List is active on the Port.
GCL Length
: The Admin Gate Control List length parameter for the Port. Valid range is 0-256. The integer value
indicates the number of entries Gate Control Elements in the Gate Control List. If you change the value, press
the Save button before configuring the Gate Control List by pressing the GCL link.
