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3.7.8 flowcontrol
The flowcontrol interface configuration command configures the Flow Control on a given interface. To restore the default,
use the no form of this command.
Syntax
flowcontrol {auto | on | off | rx | tx}
no flowcontrol
§
auto—Enables auto-negotiation of Flow Control.
§
on—Enables Flow Control.
§
off—Disables Flow Control.
§
rx—Enables receiving pause frames only.
§
tx—Enables transmitting pause frames only
Default Configuration
Flow Control is off.
Command Mode
Interface configuration (Ethernet, port-channel) mode
User Guidelines
Flow Control will operate only if duplex mode is set to FULL. Back Pressure will operate only if duplex mode is set to HALF.
When Flow Control is ON, the head-of-line-blocking mechanism of this port is disabled.
If a link is set to NOT use auto-negotiation, the other side of the link must also be configured to not use auto-negotiation.
To select auto, ensure negotiation for Flow Control is enabled.
Example
In the following example, Flow Control is enabled on g5.
Console(config)# interface ethernet g5
Console(config-if)# flowcontrol on
3.7.9 mdix
The mdix interface configuration command enables automatic crossover on a given interface. To disable automatic
crossover, use the no form of this command.
Syntax
mdix {on | auto}
no mdix
§
on—Manual mdix
§
auto—Auto mdi/mdix
Default Configuration
Automatic crossover is enabled
Command Mode
Interface Configuration (Ethernet) mode
User Guidelines
Mdix Auto : All possibilities to connect a PC with cross OR normal cables are supported and are automatically detected.
Mdix ON: It is possible to connect to a PC only with a normal cable and to connect to another switch ONLY with a cross
cable.
If MDIX is set to "no mdix", the device works oppostie from the "MDIX On" behavior. It is possible to connect to PC only with
cross cable, and to connect to another switch ONLY with Normal cable
Example
In the following example, automatic crossover is enabled on g5.
Console(config)# interface ethernet g5
Console(config-if)# mdix auto
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