Chapter 7 Circuits and Tunnels

7.11 Manual Circuit Routing

Note Automatic routing and its associated subfields are not available if both the Automatic Circuit Routing NE default and the Network Circuit Automatic Routing Overridable NE default are set to FALSE. For a full description of these defaults see Appendix C, “Network Element Defaults.”

7.11 Manual Circuit Routing

Routing circuits manually allows you to:

•Choose a specific path, not just the shortest path chosen by automatic routing.

•Choose a specific STS on each link along the route.

CTC imposes the following rules on manual routes:

•All circuits in a shared packet ring should have links with a direction that flows from source to destination.

•If you enabled Fully Protected Path, choose a diverse protect (alternate) path for every unprotected segment.

•For a node that has a path protection selector based on the links chosen, the input links to the path protection selectors cannot be 1+1 protected. The same rule applies at the path protection bridge.

If you enabled Fully Protected Path, CTC verifies that the route selection is protected at all segments. A route can have multiple protection domains with each domain protected by a different scheme.

Table 7-7summarizes the available bidirectional connections. Any other combination is invalid and generates an error.

Table 7-7

Bidirectional STS Circuits

 

 

 

 

 

 

 

 

No. of Inbound Links

No. of Outbound Links

No. of Sources

No. of Drops

Connection Type

 

 

 

 

 

 

—

 

2

1

—

path protection

 

 

 

 

 

 

2

 

—

—

1

path protection

 

 

 

 

 

 

2

 

1

—

—

path protection

 

 

 

 

 

 

1

 

2

—

—

path protection

 

 

 

 

 

 

1

 

—

—

2

path protection

 

 

 

 

 

 

—

 

1

2

—

path protection

 

 

 

 

 

 

2

 

2

—

—

Double path

 

 

 

 

 

protection

 

 

 

 

 

 

2

 

—

—

2

Double path

 

 

 

 

 

protection

 

 

 

 

 

 

—

 

2

2

—

Double path

 

 

 

 

 

protection

 

 

 

 

 

 

1

 

1

—

—

Two-way

 

 

 

 

 

 

Table 7-8summarizes the available unidirectional connections. Any other combination is invalid and generates an error.

Cisco ONS 15600 Reference Manual, R7.2

7-20

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Cisco Systems ONS 15600 manual Manual Circuit Routing, No. of Sources No. of Drops Connection Type, Double path, Two-way
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ONS 15600 specifications

Cisco Systems ONS 15600 is a highly versatile optical networking platform designed to meet the demands of modern telecommunications and data services. This multiservice edge platform supports various transmission mediums and offers a wide array of features that enable efficient data transport. Ideal for service providers and large enterprises, the ONS 15600 is engineered to provide scalable and reliable optical transport solutions.

One of the notable features of the ONS 15600 is its capability to support multiple protocols, including SONET/SDH, Ethernet, OTN, and legacy TDM services. This flexibility allows users to tailor their networks according to specific service requirements while ensuring interoperability with existing infrastructure. The platform is designed to facilitate seamless service migration, accommodating both legacy and next-generation services.

The modular architecture of the ONS 15600 enhances its scalability. It allows for easy expansion by incorporating additional line cards or interface modules without requiring significant downtime. This modularity ensures that service providers can evolve their networks over time, responding to increasing bandwidth demands and new service offerings with ease.

Incorporating advanced technologies, the ONS 15600 employs Dense Wavelength Division Multiplexing (DWDM), significantly increasing the capacity of fiber networks by allowing multiple signals to be transmitted simultaneously over a single optical fiber. This capability helps to optimize fiber utilization and reduce operational costs. In addition, the platform supports Optical Transport Network (OTN) for improved error detection and correction, contributing to higher reliability and performance.

Another key characteristic of the ONS 15600 is its robust management capabilities. The platform can be managed through Cisco's Optical Networking Manager (ONM), providing a centralized interface for network configuration, monitoring, and troubleshooting. This enhances operational efficiency and minimizes downtime, allowing service providers to focus on delivering quality services to their customers.

The ONS 15600 also prioritizes security, offering various features like encryption and access control to safeguard sensitive data during transmission. With its combination of scalability, flexibility, and security, the Cisco ONS 15600 stands out as a reliable choice for organizations looking to enhance their optical networking capabilities while meeting the evolving demands of the digital landscape. Its commitment to quality and performance makes it a cornerstone of modern optical networks.
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