R2511-HP MSR Router Series Interface Command Reference(V5)

16
Table 6 Causes for the physical state of an interface to be DOWN
Field Description
Not connected
No physical connection exists (possibly because the network cable is
disconnected or faulty).
Administratively
The port was shut down with the shutdown command. To restore the physical
state of the interface, use the undo shutdown command.
Link-Aggregation interface
down
The aggregate interface corresponding to the aggregation group to which the
interface belongs was shut down with the shutdown command.
OAM connection failure
The OAM connection failed (possibly because the connection failed to be
established or the connection is disconnected).
DLDP connection failure
The DLDP connection failed (possibly because the connection failed to be
established or the connection is disconnected).
Loopback detection-protected The interface is shut down because a loop was detected on it.
BPDU-protected The interface is shut down by the BPDU guard function.
Monitor-Link uplink down The uplink of the monitor link group to which the interface belongs is down.
Related commands
interface
duplex
Use duplex to set the duplex mode for an Ethernet interface.
Use undo duplex to restore the default duplex mode of the Ethernet interface.
Syntax
duplex { auto | full | half }
undo duplex
Default
An Ethernet interface operates in auto negotiation mode.
Views
Ethernet interface view
Default command level
2: System level
Parameters
auto: Sets the interface to operate in auto negotiation mode.
full: Sets the interface to operate in full duplex mode.
half: Sets the interface to operate in half-duplex mode. This keyword is not available for the fiber combo
ports.
Examples
# Configure interface Ethernet 1/1 to operate in full duplex mode.
<Sysname> system-view