Chapter 1 General Troubleshooting

Network Troubleshooting Tests

terminal loopback on the OC-N card turns the signal around before it reaches the LIU and sends it back through the XTC card to the MIC card. This test verifies that the XTC card cross-connect circuit paths are valid, but does not test the LIU on the OC-N card.

Figure 1-3 Terminal Loopback Process on an OC-N Card

 

Terminal loopback

 

XTC

Test Set A

 

DS-N

 

MIC

OC-N

DS-N

76191

 

Figure 1-4shows a terminal loopback on a G1000-2 card. The test-set traffic comes in on the MIC card DS-N ports and goes through the XTC card to the G1000-2 card. The terminal loopback on the

G1000-2 card turns the signal around before it reaches the LIU and sends it back through the XTC card to the MIC card. This test verifies that the XTC card cross-connect circuit paths are valid, but does not test the LIU on the G1000-2 card.

Figure 1-4 Terminal Loopback Process on a G1000-2 Card

Test Set

MIC

XTC

G1000-2

 

 

90641

A hairpin circuit brings traffic in and out on a DS-N port instead of sending the traffic onto the OC-N. A hairpin loops back only the specific STS or VT circuit and does not cause an entire OC-N port to loop back, which would drop all traffic on the OC-N port. The hairpin allows you to test a circuit on nodes running live traffic. Figure 1-5shows the hairpin circuit process on a OC-N card.

Figure 1-5 Hairpin Circuit Process on an OC-N Card

 

Hairpin circuit

 

XTC

Test Set A

 

DS-N

 

MIC

OC-N

DS-N

76193

 

Cisco ONS 15327 Troubleshooting Guide, R3.4

 

April 2003

1-3

 

 

 

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Cisco Systems ONS 15327 manual Terminal Loopback Process on an OC-N Card

ONS 15327 specifications

Cisco Systems ONS 15327 is a high-performance optical networking solution tailored for service providers and enterprises looking to enhance their optical communication infrastructure. This versatile platform is recognized for its robust performance, scalability, and flexibility, making it suitable for a wide array of applications ranging from broadband access to metropolitan area networking.

One of the standout features of the ONS 15327 is its ability to handle multiple data types over a single platform. It supports a rich array of protocols, including Ethernet and SONET/SDH, allowing service providers to deliver a diverse portfolio of services to their customers. This multiservice capability simplifies the network architecture, reducing operational complexity and costs.

The ONS 15327 is designed with a modular architecture, which enables operators to customize and scale their network as demand grows. It supports a variety of card options for different media types, wavelengths, and capacity requirements. This modularity not only facilitates straightforward upgrades but also allows for efficient network management.

In terms of technology, the ONS 15327 leverages dense wavelength division multiplexing (DWDM) capabilities to maximize the utilization of available fiber bandwidth. This allows for an impressive increase in transmission capacity without the need for additional fiber installations, making it a cost-effective solution for expanding networks.

Another significant characteristic of the Cisco ONS 15327 is its advanced performance monitoring and management features. Built-in diagnostic tools provide real-time visibility into network performance, enabling prompt identification and troubleshooting of potential issues. This proactive approach to network management enhances service reliability and customer satisfaction.

Security is also paramount in the ONS 15327. The platform integrates various security features and protocols to protect the data traversing the network, ensuring compliance with industry standards and safeguarding sensitive information.

Furthermore, the equipment is designed for easy integration into existing infrastructures. Its compatibility with Cisco’s broader networking solutions allows for seamless interconnection with routers, switches, and other devices, facilitating comprehensive network solutions.

In conclusion, Cisco Systems ONS 15327 stands out as a powerful optical networking platform that combines versatility, scalability, and advanced management features. Its ability to support various protocols and harness optical technologies makes it an essential tool for organizations aiming to optimize their telecommunications infrastructure while minimizing costs and complexity.