3Com 3032 Configuration Manual page 113

Display and Debug
Interface
If a firewall is to be established on this interface, please configure parameters
about related message filtering or address conversion.
There are lots of parameters to be configured in the interface view. So, this part
will mainly introduce configurations of some parameters specific to the physical
interface, and briefly introduce the logical interface definition. Configurations
about the link layer protocol, network layer protocol, parameter and some special
functions (such as dial, standby center, and firewall) will be introduced specifically
in other parts of this manual and no further details are provided here.
Please use the following commands in all views.
Table 83 Display and debug interface
Operation
Display current running state and statistic
information of the interface (in all views)
Clear interface statistic information (in system
view)
Shut down interface (in interface view)
Restart interface (in interface view)
When the physical or protocol state of the interface changes, the system will
automatically output related prompt information of the interface (e.g., Serial0) as
shown in following table.
Table 84 Interface state information
Interface state information
% Interface Serial0 is down
% Interface Serial0 is reset
%01:10:34: Interface Serial0 changed state to
DOWN
%01:11:03: Interface Serial0 changed state to UP The physical state of the interface is
%01:12:02: Line protocol ip on interface Serial0,
changed state to DOWN
%01:11:34: Line protocol ip on interface Serial0,
changed state to UP
If a physical interface on the router is idle and not connected with cable, use the
command to disable the interface in case that the interface goes
shutdown
abnormal due to some interference.
Display and Debug Interface
Command
display interfaces [type number
]
display interfaces brief
reset counters interface [ type
number ]
shutdown
undo shutdown
Meaning
The interface is shut down by the user.
The interface is restarted by the user.
The physical state of the interface is
changed to DOWN
changed to UP
The protocol state of the interface is
changed to DOWN
The protocol state of the interface is
changed to UP
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