prbs-test-start
Syntax
test interfaces ifd-name prbs-test-start pattern-type type direction 0/1 flip 0/1
Description
You can check the physical link connectivity by issuing this command that starts collecting the Pseudo Random Binary Sequence (PRBS) statistics. The PRBS pattern generation and verification validates the physical link connectivity in a routers. If the PRBS test passes with PRBS31 pattern type consistently, it indicates that the quality of signal received is good.
This command provides the PRBS test statistics while test is
in progress. Use the clear interfaces statistics command
to clear the collected statistics.
Use the show interfaces interface-name prbs-stats command to view the collected statistics.
While running PRBS statistics, the link will be down.
The interface link status goes down when PRBS is enabled and the interface state is back to the original state when PRBS is disabled.
On MX10003 routers, the PRBS58 pattern is supported only on JNP-MIC1-MACSEC MIC.
Issue the prbs-test-stop command to stop collecting the PRBS statistics .
For the step-by-step procedure on how to collect and view the PRBS statistics, refer Verifying Link and Transceivers using Pseudo Random Binary Sequence (PRBS) Test.
Options
ifd-name—Name
of the interface.
type—Specifies the pattern
type, that is in the range from 7 to 58.
Following pattern types are supported:
Pattern Type |
Pattern Name |
|---|---|
7 |
PRBS7 |
9 |
PRBS9 |
11 |
PRBS11 |
15 |
PRBS15 |
23 |
PRBS23 |
31 |
PRBS31 Note:
Recommended pattern to check the quality of the received link. |
58 |
PRBS58 |
direction—Specifies to configure transmit or
receive PRBS pattern.
flip—Specifies if the
pattern bits needs to be flipped or not.
Required Privilege Level
view
Release Information
Command introduced in Junos OS Release 19.2R1.