Chapter 8: Port Parameter Commands

When flow control is activated, a port sends out a PAUSE packet whenever it wants the end node to stop sending packets. Possible values are:

 

disabled

No flow control.

 

enabled

Flow control is activated.

 

auto

The switch sets flow control to match

 

 

flow control on the end node

 

 

connected to the port. If the end node

 

 

is using flow control, the switch port

 

 

also uses flow control. If the end node

 

 

is not using flow control, neither will

 

 

the switch port.

fctrllimit

Specifies the number of cells for flow control. A cell

 

represents 64 bytes. The range is 1 to 57,344 cells.

 

The default is 57,344 cells.

backpressure

Controls backpressure on the port. Backpressure

 

applies only to ports operating in half-duplex mode.

 

Possible values are:

 

 

yes, on, true, enabled

Activates backpressure on

 

 

 

the port. These values are

 

 

 

equivalent.

 

no, off, false, disabled

Deactivates backpressure

 

 

 

on the port. This is the

 

 

 

default. These values are

 

 

 

equivalent.

bplimit

Specifies the number of cells for backpressure. A cell

 

represents 64 bytes. The range is 1 to 57,344 cells.

 

The default is 57,344 cells.

bcastfiltering

Controls the broadcast filter. These parameters are

 

equivalent. Possible values are:

 

yes, on, true, enabled

The port forwards

 

 

 

broadcast frames. These

 

 

 

values are equivalent.

 

no, off, false, disabled

The port discards all

 

 

 

ingress broadcast frames.

 

 

 

These values are

 

 

 

equivalent.

holbplimit

Specifies the threshold at which the switch signals a

 

head of line blocking event on a port. The threshold

is specified in cells. A cell is 64 bytes. The range is 1 to 61,440 cells; the default is 58,000.

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Allied Telesis management software layer 2+ fast ethernet switches Flow control on the end node, Switch port, Fctrllimit