Allied Telesis AT-S39 - Manual (Page 71)

AT-S39 Command Line Interface User’s Guide
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priority Specifies the port’s priority. Entering a value of 0 to 3
directs all ingress frames received on the port to the
low priority queue on the egress port. Entering a
value of 4 to 7 directs all ingress frames to the high
priority queue on the egress port. For background
information, refer to the description of Class of
Service in the AT-S39 Management Software
User’s Guide.
overridepriority Selecting Yes for this parameter causes the port to
ignore the tagged header in tagged frames. Tagged
frames will be directed to the low or high priority
queue on the egress port, depending on the port’s
priority, set with the PRIORITY option. Specifying No
causes the port to determine a frame’s priority from
its tagged header. The default is No.
Description
This command sets a port’s operating parameters.
You should note the following concerning the operation of Auto-
Negotiation on a switch port:
❑ In order for a switch port to successfully Auto-Negotiate its duplex
mode with an end node, the end node should also be using Auto-
Negotiation. Otherwise, a duplex mode mismatch can occur. A
switch port using Auto-Negotiation will default to half-duplex if it
detects that the end node is not using Auto-Negotiation. This will
result in a duplex mismatch if the end node is operating at a fixed
duplex mode of full-duplex.
To avoid this problem, when connecting an end node with a fixed
duplex mode of full-duplex to a switch port, you should disable
Auto-Negotiation on the port and set the port’s speed and duplex
mode manually.
❑ The auto-MDI/MDI-X setting is available only when a port’s speed
and duplex mode are set by Auto-Negotiation. If a port’s speed or
duplex mode is set manually, the port’s wiring configuration
defaults to MDI-X. Disabling Auto-Negotiation and setting a port’s
speed and duplex mode manually might require setting the port’s
MDI/MDI-X setting as well.