Руководство По Устранению Ошибки для Cisco Cisco ONS 15454 SONET Multiservice Provisioning Platform (MSPP)
Common Issues With Two−Fiber Bidirectional Line
Switched Rings
Switched Rings
Document ID: 13556
Contents
Introduction
Prerequisites
Requirements
Components Used
Conventions
Background Information
Working and Protect Paths
Configure the BLSR Ring
Install the Optical Carrier Cards and Attach the Fibers
Create the DCC Terminations to the Cards
Enable the Ports to the Cards
Configure the BLSR Ring
Set up Timing for the Nodes in the BLSR Ring
Add and Drop BLSR Nodes
Add a Node
Remove a Node
Move a BLSR Trunk Card
Move the BLSR Trunk Card to a Different Slot on the 15454 Chassis
Alarms Associated with BLSR Rings
Default K Bte Alarm
BLSR Out of Synchronization Alarm
Related Information
Prerequisites
Requirements
Components Used
Conventions
Background Information
Working and Protect Paths
Configure the BLSR Ring
Install the Optical Carrier Cards and Attach the Fibers
Create the DCC Terminations to the Cards
Enable the Ports to the Cards
Configure the BLSR Ring
Set up Timing for the Nodes in the BLSR Ring
Add and Drop BLSR Nodes
Add a Node
Remove a Node
Move a BLSR Trunk Card
Move the BLSR Trunk Card to a Different Slot on the 15454 Chassis
Alarms Associated with BLSR Rings
Default K Bte Alarm
BLSR Out of Synchronization Alarm
Related Information
Introduction
You can encounter several common issues when you configure ONS 15454 nodes as a Bidirectional Line
Switched Ring (BLSR). This document addresses such issues, and provides best practice examples to
configure a BLSR ring. When you configure a BLSR ring, you can add, remove, and physically re−configure
15454 nodes.
Switched Ring (BLSR). This document addresses such issues, and provides best practice examples to
configure a BLSR ring. When you configure a BLSR ring, you can add, remove, and physically re−configure
15454 nodes.
Note: The ONS 15454 supports two−fiber and four−fiber BLSRs with up to 32 15454 nodes, based on
software and hardware configuration. BLSRs allocate half the available fiber bandwidth for protection. For
example, an optical Carrier−48 (OC−48) BLSR allocates Synchronous Transport Signals (STSs) 1−24 to
working traffic, and STSs 25−48 for protection. If a break occurs on one fiber span, working traffic switches
to the protection bandwidth (STSs 25−48) on the other fiber spans. Working traffic travels in one direction on
STSs 1−24 on one fiber, and on STSs 1−24 in the opposite direction on the second fiber. Working and
protection bandwidths must be equal. You can create only Optical Carrier−12 (OC−12) (two−fiber only), or
OC−48 and OC−192 BLSRs.
software and hardware configuration. BLSRs allocate half the available fiber bandwidth for protection. For
example, an optical Carrier−48 (OC−48) BLSR allocates Synchronous Transport Signals (STSs) 1−24 to
working traffic, and STSs 25−48 for protection. If a break occurs on one fiber span, working traffic switches
to the protection bandwidth (STSs 25−48) on the other fiber spans. Working traffic travels in one direction on
STSs 1−24 on one fiber, and on STSs 1−24 in the opposite direction on the second fiber. Working and
protection bandwidths must be equal. You can create only Optical Carrier−12 (OC−12) (two−fiber only), or
OC−48 and OC−192 BLSRs.
Prerequisites