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Layer 3 Switching Software Feature and Configuration Guide
78-6235-04, Cisco IOS Release 12.0(10)W5(18)
Chapter 4 Configuring Interfaces
Configuring the POS OC-12c Uplink Interface (Catalyst 8540)
Configuring SONET Alarms
The OC-12c POS uplink interface supports SONET alarm monitoring. To configure alarm monitoring,
perform the following steps, beginning in global configuration mode:
To determine which alarms are reported on the POS interface, and to display the BER thresholds, use
the show controllers pos command, as described in the next section, “Verifying the POS
Configuration” section on page 4-22. For a detailed description of the pos report and pos threshold
commands, refer to the Cisco IOS Interface Command Reference publication.
Command Purpose
Step 1
Router(config)# interface pos
slot/subslot/interface
Router(config-if)#
Enters interface configuration mode and specifies the POS
interface to configure.
Step 2
Router(config-if)# pos report
{b1-tca | b2-tca | b3-tca | lais |
lrdi | pais | plop | prdi | plm-p |
sd-ber | sf-ber | slof | slos |
uneq-p}
Permits console logging of selected SONET alarms.
The alarms are as follows:
• b1-tca (B1 bit error rate [BER] threshold crossing alarm)
• b2-tca (B2 BER threshold crossing alarm)
• b3-tca (B3 BER threshold crossing alarm)
• lais (line alarm indication signal)
• lrdi (line remote defect indication)
• pais (path alarm indication signal)
• plop (path loss of pointer)
• prdi (path remote defect indication)
• plm-p (payload label, C2 mismatch alarm)
• sd-ber (LBIP BER in excess of threshold)
• sf-ber (signal failure BER)
• slof (section loss of frame)
• slos (section loss of signal), uneq-p (path unequipped C2
alarm).
The b1-tca, b2-tca, b3-tca, sf-ber, slof, and slos errors are
reported by default.
Step 3
Router(config-if)# pos threshold
{b1-tca | b2-tca | b3-tca | sd-ber |
sf-ber} rate
Sets the BER threshold values of the specified alarms. Default
values are 6 for b1-tca, b2-tca, b3-tca, and sd-ber; 3 for sf-ber.
Step 4
Router(config-if)# pos ais-shut Sends a line alarm indication signal (AIS-L) to the other end of
the link after a shutdown command has been issued to the
specified POS interface. By default, the AIS-L is not sent to the
other end of the link.
You can stop transmitting the AIS-L by issuing either the
no shutdown or the no pos ais-shut commands.