3Com 3031 Command Reference Manual page 329

ATM Configuration Commands 329
debugging atm packet Syntax
debugging atm packet [ interface { interface-name | interface-type interface-num }
[ pvc { pvc-name [ vpi/vci ] | vpi/vci } ] ]
undo debugging atm packet [ interface { interface-name | interface-type
interface-num } [ pvc { pvc-name [ vpi/vci ] | vpi/vci } ] ]
View
User view
Parameter
interface-name: ATM interface name, optional. For detailed naming rules, please
refer to "Interface Configuration" part of this manual. If it is not specified, all the
packet debugging of ATM are enabled by default (including global debugging,
interface-level debugging and PVC-level debugging).
interface-type: Interface type, which can determine an ATM interface together
with interface-num.
interface-num: Interface number, which can determine an ATM interface together
with interface-type.
pvc-name: PVC name, optional. If no PVC name and no VPI/VCI pair are specified,
all the packet debugging of PVC will be enabled.
vpi/vci: VPI/VCI pair, optional. For more details, please refer to "Parameter
Description" in the pvc command.
Description
Using the debugging atm packet command, you can enable the packet debugging
of ATM. Using the undo debugging atm packet command, you can disable the
debugging.
By default, all the debugging of ATM packet is disabled.
The interface-name parameter is actually composed of interface-type and
interface-num. The difference of using them only lies in the space. In the
command line, there are spaces in interface-type and interface-num, but there is
no space in interface-name.
After the packet switch is enabled, the detailed information about
receiving/sending packets at the ATM interface or PVC will be displayed. This will
be very helpful for system troubleshooting.
The received packets will display all the information about received frames , which
can indicate whether the sending side correctly encapsulates these frames. This
will be greatly helpful for the network device detection.
Packet debug information displays the PDU byte information in hex, through
which technical support personnel or engineers can locate some system errors.