User guide

To configure BERT, you must configure the duration of the test, the bit pattern to send
on the transmit path, and the error rate to monitor when the inbound pattern is received.
To configure the duration of the test, the pattern to send in the bit stream, and the error
rate to include in the bit stream, include the bert-period, bert-algorithm, and bert-error-rate
statements, respectively, at the [edit interfaces interface-name interface-type-options]
hierarchy level:
[edit interfaces interface-name interface-type-options]
bert-algorithm algorithm;
bert-error-rate rate;
bert-period seconds;
By default, the BERT period is 10 seconds. You can configure the BERT period to last
from 1 through 239 seconds on some PICs and from 1 through 240 seconds on other PICs.
rate is the bit error rate. This can be an integer from 0 through 7, which corresponds to a
bit error rate from 10
–0
(1 error per bit) to 10
–7
(1 error per 10 million bits).
algorithm is the pattern to send in the bit stream. For a list of supported algorithms, enter
a ? after the bert-algorithm statement; for example:
[edit interfaces t1-0/0/0 t1-options]
user@host# set bert-algorithm ?
Possible completions:
pseudo-2e11-o152 Pattern is 2^11 -1 (per O.152 standard)
pseudo-2e15-o151 Pattern is 2^15 - 1 (per O.152 standard)
pseudo-2e20-o151 Pattern is 2^20 - 1 (per O.151 standard)
pseudo-2e20-o153 Pattern is 2^20 - 1 (per O.153 standard)
...
For specific hierarchy information, see the individual interface types.
NOTE: The 4-port E1 PIC supports only the following algorithms:
pseudo-2e11-o152 Pattern is 2^11 -1 (per O.152 standard)
pseudo-2e15-o151 Pattern is 2^15 - 1 (per O.151 standard)
pseudo-2e20-o151 Pattern is 2^20 - 1 (per O.151 standard)
pseudo-2e23-o151 Pattern is 2^23 (per O.151 standard)
When you issue the help command from the CLI, all BERT algorithm options
are displayed, regardless of the PIC type, and no commit check is available.
Unsupported patterns for a PIC type can be viewed in system log messages.
Copyright © 2014, Juniper Networks, Inc.88
E1 Interfaces Feature Guide for Routing Devices