Cisco NCS 1010 and NCS 1020 Datapath Configuration Guide, IOS XR Releases 26.x.x

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Cisco NCS 1010 and NCS 1020 Datapath Configuration Guide, IOS XR Releases 26.x.x

Multidegree support

Updated: September 1, 2026

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NCS1010 OLT devices support up to 8 degrees of ROADM express. You can set up multidegree connections using NCS1K-BRK-8 modules. Use BRK-8 modules for MPO breakout for express interconnect. For a multidegree topology, you must use as many BRK-8 modules and OLT devices as there are degrees. The BRK-8 modules help NCS 1010 nodes to achieve multidegree capability.

This diagram represents a sample 3-degree topology. The diagram represents three point-to-point multispan optical networks - OLT-C_1A to OLT-C_1, OLT-C_2A to OLT-C_2, and OLT-C_3A to OLT-C_3. These multispan networks can have ILA nodes between the OLT endpoints. We connect OLT-C_1, OLT-C_2, and OLT-C_3 to each other using three BRK-8 modules. Each BRK-8 module must have connections to each of the other BRK-8 modules. This express interconnect enables multidegree support. Configure the optical cross-connects on each OLT device such that the signal gets to the target OLT.

Figure 1. Typical 3-Degree topology
Figure representing typical 3-degree topology

NCS 1010 sample topologies

This section describes three sample topologies of specific hardware deployments.

  • Point-to-point topology

  • Multidegree topology: Colored solution

  • Multidegree topology: Colorless solution

  • Multidegree topology: Hybrid solution

Point-to-point topology

This sample topology is a simple point-to-point topology with no more than 2 degrees per site. You can use it for point-to-point optical links.

Topology components

To build this topology, you need these hardware:

  • Cisco NCS 1010 devices

  • NCS1K-MD32E-C modules

  • NCS1K-MD32O-C modules

  • NCS1K-BRK-24 modules

  • QDD-400G-ZR-S transceiver

  • LC/LC cables

Figure 2. Point-to-point topology
A diagram representing the point-to-point topology with the devices and port connections

Multidegree topology: colored solution

This sample topology is a three-degree topology. You can use similar topologies for multidegree optical links that have:

  • Optical channels from low TX power transponders like the ZR or ZR+ pluggable optical modules

  • Optical channels with TX power spectral density between -21dBm/12.5GHz and -14dBm/12.5GHz

Topology components

To build this topology, you need these hardware:

  • Cisco NCS 1010 devices

  • NCS1K-MD32E-C modules

  • NCS1K-MD32O-C modules

  • NCS1K-BRK-8 modules

  • Cisco 8201 routers

  • QDD-400G-ZR-S transceivers

  • LC/LC cables

  • MPO cables

Figure 3. Colored solution
A diagram representing the colored multidegree topology with devices and port connections

Multidegree topology: colorless solution

This sample topology is a three-degree topology. You can use similar topologies for multidegree optical links that have:

  • Optical channels from high TX power transponders like 1.2T line card on NCS 1004 or line cards with CFP2-400G-DCO as the trunk interface.

  • Optical channels with TX power spectral density not lower than -7dBm/12.5GHz

Topology components

To build this topology, you need these hardware:

  • Cisco NCS 1010 devices

  • NCS1K-BRK-8 modules

  • NCS1K-BRK-24 modules

  • CFP2-400G-DCO transceivers

  • Cisco NCS 1004 devices

  • NCS1K4-2-QDD-C-K9 line card

  • LC/LC cables

  • MPO cables

Figure 4. Colorless solution
A diagram representing the colorless multidegree topology with devices and port connections

Multidegree topology: hybrid solution

This sample topology is a three-degree topology. You can use similar topologies for multidegree optical links that have

  • Optical channels from both high and low TX power transponders

  • Optical channels with TX power spectral density that you use in both colored and colorless solutions

Topology components

To build this topology, you need these hardware:

  • Cisco NCS 1010 devices

  • NCS1K-MD32E-C modules

  • NCS1K-MD32O-C modules

  • NCS1K-BRK-8 modules

  • NCS1K-BRK-24 modules

  • Cisco 8201 routers

  • QDD-400G-ZR-S transceivers

  • CFP2-400G-DCO transceivers

  • Cisco NCS 1004 devices

  • NCS1K4-2-QDD-C-K9 line card

  • LC/LC cables

  • MPO cables

Figure 5. Colorless solution
A diagram representing the hybrid multidegree topology with devices and port connections