Configuring SONET/SDH Alarms

To configure the bit error rates that determine signal degradation and signal failure on the working interface:

Select the protect interface.host1(config)#controller sonet 4/1
Specify the bit error rate at which the router should generate an alarm indicating signal degradation.host1(config-controller)#threshold sd-ber 6
Specify the bit error rate at which the router should generate an alarm indicating signal failure and switch from the working interface to the protect interface.host1(config-controller)#threshold sf-ber 5

threshold

Use to set thresholds for the bit error rates associated with APS/MSP alarms.
You can issue this command only for the protect interface. It does not apply to the working interface.
Specify one of the following keywords to indicate the alarm level:
- sd-ber—Bit error rate that specifies signal degradation
- sf-ber—Bit error rate that specifies signal failure
Specify an integer n in one of the following ranges, where n corresponds to a rate of 10-n (10e-n) errors per second.
- For sd-ber, an integer in the range 5–9; the default value is 5
- For sf-ber, an integer in the range 3–5; the default value is 3
Example host1(config-controll)#threshold sf-ber 4
Use the no version to restore the default, 5 (for sd-ber) or 3 (for sf-ber), for the specified alarm.
See threshold.