Chapter 7 Circuits and Tunnels

Subnetwork Connection Protection Circuits

7.5.1 Traditional DCC Tunnels

In traditional DCC tunnels, you can use the three available channels of the MS-DCC and/or the single channel of the RS-DCC, when not used for ONS 15310-MA SDH DCC terminations, to tunnel third-party SDH equipment across ONS networks. A DCC tunnel endpoint is defined by slot, port, and DCC channel. You can connect any of the four available channels to any other available channel. To create a DCC tunnel, you connect the tunnel endpoints from one ONS 15310-MA SDH optical port to another.

Table 7-4shows the DCC tunnels that you can create.

Table 7-4

DCC Tunnels

 

 

 

 

 

DCC

SDH Layer

SDH Bytes

STM1, STM4

 

 

 

 

DCC1

Section

D1 to D3

Yes

 

 

 

 

DCC2

Line

D4 to D6

Yes

 

 

 

 

DCC3

Line

D7 to D9

Yes

 

 

 

 

DCC4

Line

D10 to D12

Yes

 

 

 

 

When you create DCC tunnels, keep the following guidelines in mind:

An optical port used for a DCC termination cannot be used as a DCC tunnel endpoint, and an optical port that is used as a DCC tunnel endpoint cannot be used as a DCC termination.

All DCC tunnel connections are bidirectional.

7.5.2IP-Encapsulated Tunnels

An IP-encapsulated tunnel puts an RS-DCC in an IP packet at a source node and dynamically routes the packet to a destination node. To compare traditional DCC tunnels with IP-encapsulated tunnels, a traditional DCC tunnel is configured as one dedicated path across a network and does not provide a failure recovery mechanism if the path is down. An IP-encapsulated tunnel is a virtual path, which adds protection when traffic travels between different networks.

IP-encapsulated tunneling has the potential to flood the DCC network with traffic, which causes CTC performance to degrade. The data originating from an IP tunnel can be throttled to a user-specified rate, which is a percentage of the total RS-DCC bandwidth.

Each ONS 15310-MA SDH supports one IP-encapsulated tunnel. You can convert a traditional DCC tunnel to an IP-encapsulated tunnel or an IP-encapsulated tunnel to a traditional DCC tunnel. Only tunnels in the Discovered status can be converted.

Caution Converting from one tunnel type to the other is service-affecting.

7.6 Subnetwork Connection Protection Circuits

From the Subnetwork Connection Protection Selectors subtab in the Edit Circuits window, you can perform the following:

View the Subnetwork Connection Protection(SNCP) circuit’s working and protection paths.

Cisco ONS 15310-MA SDH Reference Manual, Release 9.1 and Release 9.2

 

78-19417-01

7-9

 

 

 

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Cisco Systems 15310-MA manual Subnetwork Connection Protection Circuits, Traditional DCC Tunnels, IP-Encapsulated Tunnels

15310-MA specifications

Cisco Systems has established itself as a leader in the networking domain, offering a wide array of solutions to meet the needs of modern businesses. Among its impressive product lineup are the Cisco 15310-CL and 15310-MA routers, designed to provide advanced network performance and reliability.

The Cisco 15310-CL is a versatile platform that primarily serves as a carrier-class router aimed at supporting high-speed data and voice services. It is built to handle the demands of large enterprises and service providers, offering a robust design that ensures maximum uptime and performance. One of its standout features is its modular architecture, which enables users to customize their configurations based on specific application needs. This scalability allows for future expansion without the need for a complete hardware overhaul.

Key technologies integrated into the Cisco 15310-CL include high-density Ethernet interfaces and a comprehensive suite of Layer 2 and Layer 3 protocol support. The device is capable of supporting multiple types of connections, including TDM, ATM, and Ethernet. This flexibility makes it an ideal choice for organizations that require seamless migration between various service types. Moreover, with features such as MPLS (Multiprotocol Label Switching) support and advanced Quality of Service (QoS) mechanisms, the router ensures that critical applications receive the necessary bandwidth and low latency required for optimal performance.

In contrast, the Cisco 15310-MA focuses on access solutions, providing a cost-effective entry point for businesses looking to enhance their network capabilities. It is well-suited for smaller offices or branch locations that need reliable connectivity without the expense and complexity associated with larger systems. The device supports a range of access methods and provides essential features like firewall capabilities, VPN support, and comprehensive security measures to protect sensitive data.

Both models benefit from Cisco's commitment to security and manageability, offering features like enhanced encryption protocols and user authentication mechanisms that help safeguard networks against threats. Additionally, they can be managed through Cisco’s intuitive software tools, simplifying configuration and monitoring tasks for IT administrators.

The Cisco 15310-CL and 15310-MA are ideal solutions for businesses seeking to enhance their network infrastructure, ensuring firms can keep pace with evolving technology demands while maintaining a focus on security and performance. Their combination of advanced features, modular capabilities, and robust support makes them valuable assets in the networking landscape.