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SONET/SDH Port Commands
Description
This command enables the suppression of lower order alarms on SONET/SDH port such as MLPPP bundle
alarms, DS1/E1 links alarms and 336 APS channel groups alarms.
The no form of the command disables the suppression of lower order alarms on SONET/SDH port.
tx-dus
Syntax
[no] tx-dus
Context
config>port>ethernet>ssm
config>port>sonet-sdh
Description
This command forces the QL value transmitted from the SSM channel of the SONET/SDH port or the
Synchronous Ethernet port to be set to QL-DUS/QL-DNU. This capability is provided to block the use of
the interface from the SR/ESS for timing purposes.
Default
no tx-dus
threshold
Syntax
threshold {ber-sd | ber-sf} rate threshold-rate
no threshold {ber-sd | ber-sf}
Context
config>port>sonet-sdh
Description
This command configures the line signal degradation bit error rate (BER) and line signal failure thresholds.
Line signal (b2) bit interleaved parity error rates are measured and when they cross either the degradation or
failure thresholds alarms are raised (see the report-alarm line & section command), furthermore if the failure
threshold is crossed the link will be set to operationally down.
Note: For APS configurations, if the ber-sd or ber-sf threshold rates must be modified, the changes must be
performed at the line level on both the working and protect APS port member. See port
The no form of this command reverts to the default value.
Default
threshold ber-sf 6 — Signal degrade BER threshold of 10
threshold ber-sf 3 — Signal failure BER threshold of 10
Parameters
ber-sd — Specifies the BER that specifies signal degradation
ber-sf — Specifies the BER that specifies signal failure
rate — The BER negative exponent (n in 10
Values
Page 264
-3
-9
3 — 9 (10
— 10
)
-6
-3
-n
), expressed as a decimal integer.
7710 SR OS Interface Configuration Guide
aps-id on page
210.
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