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bert-algorithm

 

Syntax

Hierarchy Level

Release Information

Statement introduced before Junos OS Release 7.4.

Description

Configure the pattern to send in the bit stream during a bit error rate test (BERT). Applies to T1, E3, T3, and multichannel DS3 interfaces, the channelized interfaces (DS3, OC12, STM1), and channelized IQ and IQE interfaces (E1, E3 and DS3).

Note

When configuring CE1 or CT1 interfaces on 10-port Channelized E1/T1 IQE PICs, the bert-algorithm statement must be included at the [edit interfaces ce1-fpc/pic/port] or [edit interfaces ct1-fpc/pic/port] hierarchy level as appropriate.

Options

algorithm—Pattern to send in the bit stream. There are two categories of test patterns: pseudorandom and repetitive. Both patterns conform to CCITT/ITU O.151, O.152, O.153, and O.161 standards. The algorithm can be one of the following patterns:

  • all-ones-repeating—Pattern is all ones.

  • all-zeros-repeating—Pattern is all zeros.

  • alternating-double-ones-zeros—Pattern is alternating pairs of ones and zeros.

  • alternating-ones-zeros—Pattern is alternating ones and zeros.

  • pseudo-2e3—Pattern is 23 – 1.

  • pseudo-2e4—Pattern is 24 – 1.

  • pseudo-2e5—Pattern is 25 – 1.

  • pseudo-2e6—Pattern is 26 – 1.

  • pseudo-2e7—Pattern is 27 – 1.

  • pseudo-2e9-o153—Pattern is 29 – 1, as defined in the O153 standard.

  • pseudo-2e10—Pattern is 210 – 1.

  • pseudo-2e11-o152—Pattern is 211 – 1, as defined in the O152 standard.

  • pseudo-2e15-o151—Pattern is 215 – 1, as defined in the O151 standard.

  • pseudo-2e17—Pattern is 217 – 1.

  • pseudo-2e18—Pattern is 218 – 1.

  • pseudo-2e20-o151—Pattern is 220 – 1, as defined in the O151 standard.

  • pseudo-2e20-o153—Pattern is 220 – 1, as defined in the O153 standard.

  • pseudo-2e21—Pattern is 221 – 1.

  • pseudo-2e22—Pattern is 222 – 1.

  • pseudo-2e23-o151—Pattern is 223 – 1, as defined in the O151 standard.

  • pseudo-2e25—Pattern is 225 – 1.

  • pseudo-2e28—Pattern is 228 – 1.

  • pseudo-2e29—Pattern is 229 – 1.

  • pseudo-2e31—Pattern is 231 – 1.

  • pseudo-2e32—Pattern is 232 – 1.

  • repeating-1-in-4—One bit in four is set to 1; the others are set to 0.

  • repeating-1-in-8—One bit in eight is set to 1; the others are set to 0.

  • repeating-3-in-24—Three bits in twenty four are set to 1; the others are set to 0.

Default: pseudo-2e3

Required Privilege Level

interface—To view this statement in the configuration.

interface-control—To add this statement to the configuration.