Allied Telesis AT-S63 - Manual (Page 42)

Chapter 2: Port Parameters
42 Section I: Basic Operations
Back Pressure Use this parameter to set backpressure
on a port. This option only appears for
ports operating in half-duplex mode. A
port uses backpressure to control the flow
of ingress packets. Possible settings are:
Enabled - Backpressure is enabled.
Disabled - Backpressure is disabled. This
is the default.
Flow Control/Back
Pressure Limit Use this parameter to specify the
threshold for flow control or backpressure.
The threshold is specified in cells. A cell
equals 128 bytes. The range is 1 to 7935.
The default is 7935 cells.
HOL Blocking HOL blocking sets a threshold on the
utilization of a port’s egress queue. When
the threshold for a port is exceeded, the
switch signals other ports to discard
packets to the oversubscribed port. The
threshold is specified in number of cells. A
cell is 128 bytes. The range is 1 to 8191.
The default is 682.
Broadcast Rate Limiting Use this parameter to enable or disable
ingress broadcast packet limits. Possible
settings are:
Enabled - Broadcast packet ingress rate
limiting is enabled. To set the rate limit,
use the Broadcast Rate parameter.
Disabled - Broadcast packet ingress rate
limiting is disabled. This is the default.
Broadcast Rate Use this parameter to set the broadcast
rate limit in packets per second. The
range is 0 to 262143. The default is
262143.
Table 5. Port Configuration Window
Parameter Definition