Specifications

29-9
Cisco BPX 8600 Series Installation and Configuration
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
Chapter 29 Troubleshooting
Troubleshooting SONET Automatic Protection System
Troubleshooting SONET Automatic Protection System
Introduction
For APS line redundancy, these problems can occur:
• APS Configuration Problems, page 29-9
– Not Able to Correctly Set Up APS 1+1 Line Redundancy Configuration, page 29-9
– Unable to set up APS 1:1 line redundancy configuration, page 29-10
– Operator information about APS architectures, page 29-10
• Operational Problems, page 29-11
– What the Various APS Switches Mean
– Unable to perform APS external switch after forced or manual APS switch, page 29-12
– APS manual switch to a line does not occur right away, page 29-12
– Switch occurs after lockout issued, page 29-12
– APSswitchmadetoalineinalarm,page29-13
– Reverse switch, page 29-13
– APS switch occurs at the same time as a yred switch, page 29-13
– APS switch occurs after issuing an APS clear switch, page 29-13
– APS Switch Occurs even though APS Forced switch in effect, page 29-14
– APS line is failing to switch, page 29-14
– Large cell loss when performing a front card switchover, page 29-14
– APS service switch description, page 29-14
– APS line does not seem to switch and active line is in alarm, page 29-15
– BXM backcard LED green and yellow indications, page 29-15
– BXM Port LED states, page 29-16
• APS Alarms
– What do APS Alarms Represent
APS Configuration Problems
The following sections describe possible APS configuration problems.
Not Able to Correctly Set Up APS 1+1 Line Redundancy Configuration
Description: The addapsln user interface command fails to execute correctly for APS 1+1 line
addition.