User guide

bert-algorithm
Syntax bert-algorithm algorithm;
Hierarchy Level [edit interfaces ce1-fpc/pic/port],
[edit interfaces ct1-fpc/pic/port],
[edit interfaces interface-name ds0-options],
[edit interfaces interface-name e1-options],
[edit interfaces interface-name e3-options],
[edit interfaces interface-name t1-options],
[edit interfaces interface-name t3-options]
Release Information Statement introduced before Junos OS Release 7.4.
Statement introduced in Junos OS Release 12.2 for the ACX Series Universal Access
Routers.
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 2
3
– 1.
• pseudo-2e4—Pattern is 2
4
– 1.
• pseudo-2e5—Pattern is 2
5
– 1.
• pseudo-2e6—Pattern is 2
6
– 1.
• pseudo-2e7—Pattern is 2
7
– 1.
• pseudo-2e9-o153—Pattern is 2
9
– 1, as defined in the O153 standard.
• pseudo-2e10—Pattern is 2
10
– 1.
• pseudo-2e11-o152—Pattern is 2
11
– 1, as defined in the O152 standard.
Copyright © 2014, Juniper Networks, Inc.38
E1 Interfaces Feature Guide for Routing Devices