Configuring Link-Down Event Suppression On An Ethernet Interface; Configuring Loopback Testing On An Ethernet Interface - HP A5830 Configuration Manual

Step...
2. Enter Ethernet
interface view or
port group view.
3. Shut down the
Ethernet interface
or interfaces.
Configuring link-down event suppression on an Ethernet
interface
An Ethernet interface has two physical link states: up and down. Each time the physical link of an
interface goes up or comes down, the physical layer reports the change to the upper layers, and the
upper layers handle the change, resulting in increased overhead.
To enable an Ethernet interface to suppress link-down events:
Step...
1. Enter system view.
2. Enter Ethernet interface
view.
3. Set a link-down event
suppression interval.

Configuring loopback testing on an Ethernet interface

When an Ethernet interface does not work normally,
problem. Loopback testing has the following types:
 Internal loopback testing—Tests all on-chip functions related to Ethernet interfaces.
External loopback testing—Tests hardware of Ethernet interfaces. To perform external loopback

testing on an Ethernet interface, connect a loopback plug to the Ethernet interface. The switch sends
test packets out the interface, which are expected to loop over the plug and back to the interface. If
the interface fails to receive any test packet, the hardware of the interface is faulty.
An Ethernet interface in a loopback test does not forward data traffic.
To enable loopback testing on an Ethernet interface:
Step...
1. Enter system view.
2. Enter Ethernet interface view.
3. Enable loopback testing.
Command...

Enter Ethernet interface view:
interface interface-type interface-number

Enter port group view:
port-group manual port-group-name
shutdown
Command...
system-view
interface interface-type
interface-number
link-delay delay-time
Command...
system-view
interface interface-type interface-
number
loopback { external | internal }
4
Remarks
Use any command
To shut down an Ethernet interface,
enter Ethernet interface
To shut down all Ethernet interfaces in
a port group, enter port group view
Required
By default, Ethernet interfaces are up
Remarks
—
—
Required
Link-down event suppression is disabled by
default
enable loopback testing on it to identify the
Remarks
—
—
Optional
Disabled by default