I have to say. Select the router to start with the Select CPU

• The CPU of the router is important

CNET China. Zol June 2: In the Internet world, each router is like a post office, the information on the network classification and integration, they are transmitted to the destination by address. Routers have become one of our indispensable network equipment, in the home broadband sharing, office network and the formation of a variety of broadband network applications are playing a very important role. So how do we choose a suitable router? This article will focus on the performance of the router CPU, to provide you with a practical procurement advice.

Broadband routers, CPU performance cannot be ignored

Router as an interface device of Internet Bar Network, in the entire architecture plays a vital role, from the structure, the router is a dedicated computer system, and routers and PCs, with a central processing unit CPU, and different routers, the CPU is generally not the same, the CPU is the processing center of the router.

Router processor performance should not be overlooked

The author found that in the past, many router shopping articles, many places stressed that CPU performance does not fully reflect the performance of the router, but by the router throughput, delay and routing calculation capabilities and other indicators embodied. Therefore, many users in the selection and procurement of routers, consciously or unconsciously ignored the router CPU performance, and focus on the function of products and other factors.

In fact, in the router, especially the next generation of broadband multi-WAN routers in general application, due to provide more advanced functions, requires more sophisticated computing power, CPU performance directly determines the hardware performance of the product, can no longer be intended to buy consumers ignore.

However, these important indexes, such as throughput, delay and routing calculation ability of the router, have great relationship with CPU performance.

One is that many buyers pay more attention to the router throughput, the broadband router throughput refers to the internal LAN and external network between the data flow, that is, the data flow between the Lan-wan. Rather than the flow between lan-lan, it means the number of packets that are passed in unit time without losing the packet. If the throughput is too small, the traffic management of the data channel between the internal and external network becomes the bottleneck of the network, which has a negative effect on the transmission efficiency of the whole network. Throughput is the hardware performance metric for broadband routers, and broadband router-CPU will affect the throughput value.

The other is delay, the delay is mainly caused by two factors: the link transmission delay and the queue delay caused by the transmission channel. The former mainly depends on the physical media used in the transmission channel (such as the use of optical fiber transmission or wireless transmission, etc.) and the delay is fixed. The latter depends largely on the processing speed of the network joint-point router, which is dependent on the CPU's computational processing power of the router.

Other important factors, such as routing calculation ability, are all connected with CPU's main frequency, bus width (16 bit or 32 bit), cache capacity and structure, internal bus structure, operation mode, etc. In any case, the performance of routers, especially the broadband router processors in multiple WAN ports, should not be overlooked.

What exactly is the current network condition, what kind of router does the user need? And the next generation of routers on the CPU requirements is how?

• New generation of routers

New generation of routers delivers high quality business and performance

To live, the network application environment is relatively single, network applications and business are less, the router's business performance, reliability, security, quality of service requirements are also lower. But in recent years, the network development more and more quickly, people's request to the information person is also more and more high, we can see, does not have the application environment operation environment and the business characteristic each to have the different, the construction network way also various, to the router business demand also more and more, increasingly complex. For example, the scale of internet cafes is more and more large, a variety of network applications, different users of a variety of application requirements, Internet cafes require broadband router full-featured, stable. Another example. There are more and more enterprises to introduce many businesses into the enterprise network, but also the need to establish an enterprise VPN network business, and these businesses need to obtain relatively independent resources to meet the different aspects and application requirements.

Routers provide more and more business types, and their pressure increases, and the performance of router processors is tested a lot. Performance has become a key factor in router development and business capability, routers need not only the business function of the "have" or "none" problem, but how to provide the overall quality of the network business guarantee.

In the past, the router has the highest processing speed between 150-200mhz, with such efficiency, running single WAN routing application is enough, but if the Internet café needs to carry out bandwidth management or firewalls and other actions, for each packet to be filtered, at this time, the performance of the CPU will be low response speed, Corresponding to the lack of data processing capacity, processor resources are heavily occupied, reduce the speed of process processing, not only can not play the bandwidth management functions, but also affect the original bandwidth, outweigh the gains.

Another example is the enterprise to start QoS, security, VPN business, the processor will appear a sharp decline in performance, become a performance bottleneck, or even a panic situation, which leads to the entire network of paralysis or collapse, of course, not to mention to provide users with high-quality services.

When the CPU performance does not meet the business processing requirements, the system performance will be significantly reduced, usually more than half of the loss. As a result, multiple WAN port routers must adopt high speed CPU and large capacity memory, otherwise it will not be able to handle the traffic of multiple WAN ports, let alone the various heavy tasks of resolving each IP packet.