R3102-R3103-HP 6600/HSR6600 Routers Interface Configuration Guide
5
You might need to shut down and then bring up an Ethernet interface or subinterface to activate some
configuration changes, for example, the speed or duplex mode changes.
To shut down an Ethernet interface or subinterface:
Ste
p
Command
Remarks
1. Enter system view.
system-view N/A
2. Enter Ethernet interface
or subinterface view, or
port group view.
• Enter Ethernet interface view:
interface interface-type
interface-number
• Enter port group view:
port-group manual
port-group-name
• Enter Ethernet subinterface view:
interface interface-type
interface-number.subnumber
Use one of the commands.
To shut down an Ethernet interface or
subinterface, enter Ethernet interface
or subinterface view. To shut down all
Ethernet interfaces in a port group,
enter port group view.
3. Shut down the Ethernet
interface or subinterface.
shutdown
By default, Ethernet interfaces and
subinterfaces are up.
Configuring physical state change suppression on an Ethernet
interface
The physical link state of an Ethernet interface is either up or down. Each time the physical link of a port
goes up or comes down, the system immediately reports the change to the upper-layer protocol modules
(such as routing and forwarding modules) for packet transmission, and automatically generates traps
and logs, informing the user to take corresponding actions.
To prevent frequent physical link flapping from affecting system performance, configure physical state
change suppression to suppress the reporting of physical link state changes. The system reports physical
layer changes only when the suppression interval expires.
To configure physical state change suppression on an Ethernet interface:
Ste
p
Command
Remarks
1. Enter system view.
system-view N/A
2. Enter Ethernet interface view.
interface interface-type
interface-number
N/A
3. Set a physical state change
suppression interval.
link-delay delay-time
By default, physical state change
suppression is disabled.
Configuring loopback testing on an Ethernet interface
If an Ethernet interface does not work correctly, you can enable loopback testing on it to identify the
problem. An Ethernet interface in a loopback test does not forward data traffic.
Loopback testing has the following types:
• Internal loopback testing—Tests all on-chip functions related to Ethernet interfaces.