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

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-t timeout: Sets the timeout time for receiving looped-back test packets, in the range of 0 to 65535
milliseconds. The default timeout time is 2000 milliseconds.
interface type number: Specifies an interface.
Usage guidelines
Use looptest to detect loops on interfaces. The system returns the following line quality information:
• Information about each test packet. If a test packet is looped back, the number of bytes, sequence
number, and delay are displayed for the test packet. If a test packet is not looped back before the
timeout timer expires, the system displays " Wait time out."
• Statistics for all test packets, including the numbers of sent, received, lost, and error packets,
percentages for error and lost packets, and the conclusion.
If the line speed is slow, increase the timeout time.
Examples
# Perform a loop test on Serial 1/0/0.
<Sysname> looptest interface serial 1/0/0
LOOPTEST Serial1/0/0: 52 data bytes, press CTRL_C to break
Receive from Serial1/0/0: bytes=52 sequence=1 time=1 ms
Receive from Serial1/0/0: bytes=52 sequence=2 time=1 ms
Receive from Serial1/0/0: bytes=52 sequence=3 time=1 ms
Receive from Serial1/0/0: bytes=52 sequence=4 time=1 ms
Receive from Serial1/0/0: bytes=52 sequence=5 time=1 ms
--- Serial1/0/0 looptest statistics ---
5 packet(s) transmitted
5 packet(s) received
0 packet(s) lost
0 packet(s) error
0.00% packet lost
0.00% packet error
round-trip min/avg/max = 1/1/1 ms
conclusion: loopback
Related commands
• fe1 loopback
• ft1 loopback
• loopback
pri-set (CT1/PRI interface)
Use pri-set to bundle timeslots into a PRI set on the CT1/PRI interface.
Use undo pri-set to remove the timeslot bundle.
Syntax
pri-set [ timeslot-list list ]
undo pri-set