Ethernet Port Configuration 149
For detailed information about Combo ports and the corresponding physical ports,
refer to the installation manual.
Enabling Flow Control
on an Ethernet Port
When flow control is enabled on both sides, if traffic congestion occurs on one
side, the side will send a Pause frame notifying the peer side to temporarily
suspend the sending of packets. The peer side is expected to stop sending packets
when it receives the Pause frame. In this way, flow controls helps to avoid the
dropping of packets. Note that flow control can take effect only when it is enabled
on both sides.
Follow these steps to enable flow control on an Ethernet port:
Configuring the
Suppression Time of
Physical-Link-State
Change on an Ethernet
Port
An Ethernet port 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 port:
Enabling Loopback Test
on an Ethernet Port
You can enable loopback testing to check whether the Ethernet port functions
properly. Note that no data packets can be forwarded during the testing.
Loopback testing falls into the following two categories:
Enable a specified
double Combo port
undo shutdown Optional
By default, out of the two ports in a
Combo port, the one with a smaller
port ID is enabled.
To do… Use the command… Remarks
To do… Use the command… Remarks
Enter system view system-view -
Enter Ethernet port view interface interface-type interface-number -
Enable flow control flow-control Required
Turned off by default
To do… Use the command… Remarks
Enter system view system-view -
Enter Ethernet port view interface interface-type
interface-number
-
Configure the up/down
suppression time of
physical-link-state changes
link-delay delay-time Required
The default suppression time
is 0 seconds, indicating that
the physical layer reports the
change of the port state to
the system right after the port
state changes.
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