MSTP bearer technology for major customer dedicated lines

This article briefly analyzes and demonstrates the satisfaction of MSTP as a major customer service carrying technology, and explores the root cause of MSTP as the current best customer bearing technology.

The maturity of MSTP accumulated over many years of development is the most reliable guarantee for high reliability

MSTP has multi-latitude protection at the device level, network level and service level. The MSTP device level has a complete 1 + 1 board protection configuration, the network level has MSP / SNCP, ASON and other protection methods, and the service level has LAG / BPS / TPS. The protection mode can realize the carrier-class protection of 50ms service under all conditions, which provides a guarantee for the reliable transmission of large customer services. With millions of MSTP / SDH equipment running on the Internet worldwide, large-scale commercialization has fully formed this most mature and reliable service transmission equipment form, which is the most important point as a large customer bearer network.

High security is an inherent quality of MSTP

The transmission signal of the MSTP technology is an SDH signal. To carry out an attack, the SDH must first be parsed. This requires professional equipment and is extremely costly. Secondly, the services carried are all time-slot isolation, and it is necessary to obtain the services of major customers mapped into the SDH signal. Time slots constitute information, which builds layer 2 protection; at the same time, the customer's own business encryption mechanism can also provide layer 3 protection. Even if a major customer's service is attacked at the application layer, the MSTP bearer service is completely physically isolated, and the single-slot service will not affect the system at all, so it will not affect other customers at any access point.

MSTP's natural rigid pipes provide the highest quality QoS guarantee for large customers

MSTP provides end-to-end rigid pipes for large customers, each occupying different channels or time slots, and is not physically affected by changes in other customers' bandwidth. Of course, MSTP can also implement functions such as Layer 2 Ethernet bridges, and can also provide shared transmission methods to customers who propose bandwidth sharing, and realize traffic management between different large customers through its own mature QoS mechanism.

The rich interfaces of MSTP and the wide coverage of the existing network ensure the rapid opening and reliable operation and maintenance of multi-scenario projects

At present, telecom operators have a large number of MSTP devices on the Internet, which cover a wide range. Only by adding a set of terminal access equipment on the side of large customers, you can quickly open large customer services. At the same time, because large customers have multiple business interface requirements, such as: V.35 / V.24, N & TImes; 64K, Framed E1, E3, etc., MSTP equipment can support these business interfaces, and its rich multi-service interface can meet each The needs of a large customer business. Based on the large number of MSTP applications on the existing network, operators have mature operation and maintenance teams and operation and maintenance experience, combined with the rapid problem positioning provided by SDH's rich overhead resources. MSTP is the easiest bearer network to operate and maintain.

We know that operators have complete MSTP network coverage. Low-cost MSAP devices are often used at large customer access points, which can greatly reduce network construction costs. Both MSTP and MSAP technologies belong to the SDH system, which naturally achieves perfect interconnection, thereby achieving end-to-end unified management, and easy network deployment and operation and maintenance.

MSTP is the best bearer solution for the most common TDM E1 private line service on the existing network

By comparing and analyzing the technical indicators of different bearer modes, we can see that MSTP is the best solution to ensure the quality of the TDM E1 service of the 2M large customer dedicated line widely used on the existing network.

1. The end-to-end delay PWE3 mode is 10 times that of NaTIve TDM

The picture above is the process of E1 doing PWE3. According to the definition in the standard, the number of received E1 reaches half of the jitter buffer before sending out. Usually 4 frames of E1 are encapsulated in each ETH packet. If the jitter buffer is configured to 250us (the normal configuration of each manufacturer is generally 100us-4ms), the single node delay is about 1ms. For MSTP technology, the delay from E1 to VC12 is less than 50us, and the single node delay is about 100us.

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