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Cisco NCS 1010 Optical Applications Configuration Guide, IOS XR Release 25.x.x

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7.11.x, 24.2.x, and 24.3.x
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What are the configurations to upgrade from C-band to C+L band without traffic hit?
How does disabling Gain Estimator and Link Tuner affect the upgrade process?
What role does the Cisco Optical Network Planner play in the C+L band upgrade?

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Cisco NCS 1010 Optical Applications Configuration Guide, IOS XR Release 25.x.x

What are the configurations to upgrade from C-band to C+L band without traffic hit?
How does disabling Gain Estimator and Link Tuner affect the upgrade process?
What role does the Cisco Optical Network Planner play in the C+L band upgrade?

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NCS 1010 Overview

NCS 1010 Optical Line System

Topology Discovery and Communication

Topology discovery and communication using OSPF in NCS 1010 nodes

Span Loss

Span loss

Raman Tuning

Raman tuning
Configure Raman tuning
Verify Raman tuning configuration and status
Raman tuning with OTDR lock and OSRI

Gain Estimator

Gain estimator

Link Tuner

Link tuner

Automatic Power Control

Automatic Power Control
Operation of span-mode APC
Switch between APC modes

Band Failure Recovery

Band Failure Recovery
Events leading to band failure
Band failure recovery in various scenarios

Upgrade C-Band to C+L Band Without Affecting Traffic Flow

C-band to C+L band upgrades

Automatic Link Bringup

Automatic link bringup

Optical Time Domain Reflectometer

Fiber link monitoring and diagnostics using OTDR
Automatic OTDR scans

Cisco NCS 1010 Optical Applications Configuration Guide, IOS XR Release 25.x.x

Upgrade C-Band to C+L Band Without Affecting Traffic Flow

Updated: April 23, 2026

This chapter describes how to expand Cisco NCS 1010 network capacity by integrating L-band support into existing C-band infrastructures.

C-band to C+L band upgrades

This section explains how C-band to C+L band upgrades on the NCS 1010 enable expanding network bandwidth non-disruptively by adding L-band operation to an existing C-band optical network.

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