Cisco ASR 900 Series Configuration Guide

protection-group 401 working
end
UPSR Protect Path Configuration:
enable
configure terminal
controller MediaType 0/12/6
mode sonet
controller sonet 0/12/6
rate oc48
sts-1 1 - 48 mode sts-48c
protection-group 401 protect
end
Verification of UPSR Configuration
Use the show protection-group command to verify UPSR configuration:
show protection-group
PGN Type Working I/f Protect I/f Active Status
-------------------------------------------------------------------------------
401 STS48C SONET0/3/6.1-48 SONET0/12/6.1-48 W A
-------------------------------------------------------------------------------
Status legend:D=Deleted FO=Force SF=SignalFailure SD=SignalDegrade
FL=Fail M=Manual L=Lockout C=Clear A=Auto
(W)=working, (P)=protect
Alarms at SONET Layers
SONET equipment detects events and alarms at each of SONET's three layers — section, line and path.
Typically, a SONET chassis sends alarms both upstream and downstream in order to notify other devices of
the problem condition.
SONET Alarm Surveillance
SONET alarm surveillance uses two terms:
• State—Condition that is reported or detected. A SONET chassis enters a state when the chassis detects
the occurrence of an event. A SONET chassis exits that state when the chassis no longer detects the
event.
• Indication—Prompted by a change of state. This indicates the presence of a condition. This document
discusses the Alarm Indication Signal (AIS), and Remote Defect Indicator (RDI).
The interface of active alarm or defect is maintained in a down/down state. The process used to troubleshoot
down/down SONET interfaces is similar to that for digital interfaces, such as T1 and T3.
Section Alarms
The following section alarms are supported:
• LOS — Loss of Signal
• LOF — Loss of Frame
• SEF — Severely Error Frame
1-Port OC-192 or 8-Port Low Rate CEM Interface Module Configuration Guide, Cisco IOS XE Everest 16.7.x (Cisco
ASR 900 Series)
33
Configuring SONET
Alarms at SONET Layers

Cisco ASR 900 Series Specifications

General

Brand	Cisco
Model	ASR 900 Series
Category	Network Router
Language	English