3Com 4210G Series, Configuration Manual, Page: 42 / 1133

1-3
To do… Use the command… Remarks
Shut down the
Ethernet interface
shutdown
Optional
By default, an Ethernet interface is in up
state.
To bring up an Ethernet interface, use
the
undo shutdown
command.
z
10GE ports can be displayed only when 10GE interface module expansion cards are available on
the device.
z
10GE ports do not support the
duplex
command or the
speed
command.
Configuring Flow Control on an Ethernet Interface
When flow control is enabled on both sides, if traffic congestion occurs at the ingress interface, it will
send a Pause frame notifying the egress interface to temporarily suspend the sending of packets. The
egress interface is expected to stop sending any new packet when it receives the Pause frame. In this
way, flow control helps to avoid dropping of packets. Note that this will be possible only after flow
control is enabled on both the ingress and egress interfaces.
Follow these steps to enable flow control on an Ethernet interface:
To do… Use the command… Remarks
Enter system view
system-view
—
Enter Ethernet interface view
interface interface-type
interface-number
—
Enable flow control
flow-control
Required
Disabled by default
Configuring the Suppression Time of Physical-Link-State Change on an Ethernet
Interface
An Ethernet interface operates in one of the two physical link states: up or down. During the
suppression time, physical-link-state changes will not be propagated to the system. Only after the
suppression time has elapsed will the system be notified of the physical-link-state changes by the
physical layer. This functionality reduces the extra overhead occurred due to frequent
physical-link-state changes within a short period of time.
Follow these steps to configure the suppression time of physical-link-state changes on an Ethernet
interface:
To do… Use the command… Remarks
Enter system view
system-view
—
Enter Ethernet interface view
interface interface-type
interface-number
—