Chapter 10 Maintenance
Confidential and Proprietary Information of ZTE CORPORATION 297
TABLE 444 SET LOOP DETECT SEND COMMAND
Format Mode Function
set loopdetect
sendpktinterval
<5-60>
global config This sets interval
time of sending
loop test packet
Result: This sets interval time of sending loop test packet.
Note: Loop test function send test packet in an interval time,
and judging whether there is a self-loop by judging whether
the packet is received in the interval time. Command is
used to set the interval time, by second.
9. To display port loop test configuration and port detection
status, use command show loopdetect in global config
mode. This is shown in
Table 445.
TABLE 445 SHOW LOOP DETECT COMMAND
Format Mode Function
show loopdetect global config This displays port
loop test
configuration and
port detection
status
Result: This displays port loop test configuration and port
detection status.
Note: When the port cannot work normally, configure show
loopdetect to observe whether a port loop exists. If no
loop is detected and the spanning tree of the port is enabled,
eliminate fault according to status of spanning status.
E
ND OF STEPS
Single-Port loop test has been configured.
Virtual Circuit Test
Virtual circuit test (VCT) uses time domain reflectometer (TDR)
to diagnose circuit. This test enables to diagnose circuit error
status, such as Open, Short, Impedance Mismatch and Good
termination, and to obtain the distance of the error circuit with
the fitted empirical formula.
Use show vct port command on switch to query the VCT result
of the specified port.
For interface modules in extended slots, this switch only
supports VCT of gigabit electrical interface. For other interface
modules, VCT is not supported.
Result
VCT Function