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prbs-test-start

 

Syntax

Release Information

Command introduced in Junos OS Release 19.2R1 for MX10003 and MX204 router.

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.

Note
  • 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