Xiang Jie specific technology to low-end switch-IT industry trends – 4D Theater
From the current Ethernet Switch The overall market situation, Fast switch has become the market mainstream, Gigabit switch market share continued to increase, while Shizhao switch has been basically out of the market. Ethernet switch market is very clear this year is already a struggle between gigabit switches, which is Network Technological developments and the inevitable result of market maturity.
From specific technical trend, the third layer exchange has become the key to using Intranet, it will switch the second floor and third floor Router The advantages of combining the two into a flexible solution that provides wire-speed performance at all levels. The integrated structure also introduced strategic management properties, which not only make the second layer and third layer associate with each other, but also to provide traffic priority treatment, safety and a variety of other flexible features, such as link aggregation, VLAN and Dynamic Intranet deployment. Meanwhile, the market has made the switch a higher security requirements, as Network Security The continuous improvement of performance requirements, VPN technology and secure authentication technology will be extensively applied.
Third layer is divided into interface layer switches, switching layer and the routing layer of three parts, basically has all the features of traditional switches. Subject to the third level switches, switches, concrete technology, including:
Programmable ASIC ASIC is dedicated to optimization of the second layer processing ASIC is the core of today's networking solutions, will integrate multiple functions on a chip with a simple design, high reliability, low power consumption , higher performance and lower cost advantages.
Distributed Pipeline Line with distributed, multiple distributed forwarding engine to quickly transfer data packets independently. In the pipeline, multiple ASIC chips are multiple frames. This concurrency and pipeline performance can be forwarded to a new height, to achieve all the ports on Demand (Unicast), Radio (Broadcast) and multicast (Multicast) for wire-speed performance.
Dynamically scalable Memory For advanced LAN switching products, the real performance is built upon intelligent memory system. The third layer switch part of the memory directly associated with the forwarding engine. Increase the number of interface modules, including their own forwarding engine, memory extended accordingly. ASIC-style treatment by pipeline, an increase of dynamic cache structure Memory Utilization, the system can handle large data streams without packet loss burst.
advanced queue mechanism Outstanding performance even if the network equipment, will be crowded segment of its connection harm. Traditionally, the flow through a port is only one output queue to be saved in the cache, no matter what its priority level is, the way must be processed according to FIFO. When the queue is full, any excess portion will be discarded. In addition, when the queue is longer, the delay also increases. This feature makes the traditional Ethernet services running on real-time processing and multimedia applications very difficult. Based on this reason, many network equipment manufacturers to develop new technology to an Ethernet segment at a different level of service provided, while providing delay and jitter control, so the introduction of queues for each port has different levels of mechanism.
Automatic traffic classification Some data flow data flow is more important than others. Automatic traffic classification, the third layer of switches to direct data packets line distinction between user-specified data stream, in order to achieve low-latency, high-priority transmission and avoid congestion.
Intelligent License Control Third layer switch to provide a variety of security mechanisms and use of traffic classification, the administrator can restrict the flow of data of any identified, including restrictions on Server Access and removal of unwanted broadcast agreement. This is the field of network technology breakthrough, which provides wire-speed Firewall .
dynamic traffic monitoring Traffic classification, prioritization and resource reservation handle the enterprise network and Intranet managers can focus on more important things, namely traditional and next generation applications. But one thing still needs to be done, and that is traffic monitoring. Flow monitoring mechanism can not be a strategy, because it is actually a protection mechanism. It monitors network traffic and congestion, and the dynamic response of these circumstances to ensure that all network elements (end-user and the network itself) are under control, have the best run.
Congested LAN in order to carry out priority processing, many of the third layer switches used IEEE802.1p level of service.
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