Specifying bit error rate thresholds, Specifying bit error rate, Thresholds – Cabletron Systems SMARTSWITCH ROUTER 9032578-05 User Manual
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SmartSwitch Router User Reference Manual
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Chapter 6: Packet-over-SONET Configuration Guide
To manage the working and protecting PoS interfaces, enter the following commands in
Configure mode:
Note:
You can only specify one option, lockoutprot, forced or manual, for a port. Also,
an option can be applied to either the working port or the protecting port, but not
both working and protecting ports at the same time.
To return the circuit to the working interface after the working interface becomes
available, enter the following commands in Configure mode:
Specifying Bit Error Rate Thresholds
If the bit error rate (BER) on the working line exceeds one of the configured thresholds, the
receiver automatically switches over to the protecting line.
BER is calculated with the following:
BER = errored bits received/total bits received
The default BER thresholds are:
•
Signal degrade BER threshold of 10
-6
(1 out of 1,000,000 bits transmitted is in error).
Signal degrade is associated with a “soft” failure. Signal degrade is determined when
the BER exceeds the configured rate.
Prevent a working interface from switching to a
protecting port. This command can only be applied
to a port configured as a protecting port.
sonet set
lockoutprot
Force a switch to the specified port. This command
can be applied to either the working or protecting
port.
sonet set
forced
Manually switch the line to the specified port. This
command can be applied to either the working or
protecting port.
sonet set
manual
Enable automatic switchover from the protecting
interface to the working interface after the working
interface becomes available. This command can only
be applied to a protecting port.
sonet set
revertive|nonrevertive
Sets the number of minutes after the working
interface becomes available that automatic
switchover from the protecting interface to the
working interface takes place. The default value is 5
minutes.
sonet set