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Configuring, Modifying, and Monitoring the Unit
29
Setting the flow control
Ports are compliant to flow control specifications 802.3x or back-pressure.
You can set a port to perform flow control only if this port is in full duplex mode otherwise back-
pressure is applied to control the incoming flow of data.
When the port is configured to do 802.3z flow control the switching engine sends a continuous
flow of idle frames to avoid dead locks.
If the port applies back-pressure the mechanism is slightly different in the sense that instead of
sending idle frames the switching engine sends a collision signal.
get-fctrl
The get-fctrl command displays the status of the flow control function.
get-fctrl <database> <port-number>
opt.[arg #0] database type - either {run|nvram|all}; default : run
opt.[arg #1] port index in format <dport>;default: all
get-fctrl nvram
SYS_console>get-fctrl ?
Example
get-fctrl gets the port flow control request: enable or disable
opt.[arg #0] database type - either {run|nvram|all}; default : run
opt.[arg #1] port number - 1..25; default : all
SYS_console>
set-fctrl
The set-fctrl command sets a port’s flow control mode.
SYS_console>set-fctrl ?
set-fctrl sets the port flow control: enable or disable
[arg #0] database type - either {run|nvram|all}
[arg #1] port number - 1..25
opt.[arg #2] enter either {enable|disable}; default : enable