Cost Saving secret app layer-3 Switch Technology Solution

The layer-3 switch technology is quite common, So I studied how to save the company's cost by using the layer-3 switch technology. I would like to share it with you here, hoping it will be useful to you. The layer-3 Switch Technology Access solution helps reduce the networking cost for networks with large scale and many downstream nodes. At present, more and more companies need to establish their own enterprise networks to connect their headquarters with their branches or offices distributed in different cities and regions, so as to improve the efficiency of their work and enhance the competitiveness of the market.

However, the shortcomings of the traditional router networking mode gradually emerge. factors such as high router costs, poor scalability, and complicated maintenance management restrict the development and promotion of the network. The application of the layer-3 Switch Technology Access solution helps reduce the networking cost for networks with large scale and many downstream nodes.

Vro prices are relatively expensive compared with vswitches, and low-end vrouters do not support direct access to G.703ITU's standard on physical and electrical characteristics of various digital interfaces, including 64kbps and 2.048Mbps interfaces, the G/V converter must be used. In branch nodes, high-end routers are generally not configured, and even low-end routers are several times more expensive than switches. Therefore, the layer-3 Switch Technology Access solution is used, for networks with larger scales and more downstream nodes, the more cost savings will be.

3-layer switch networking advantages

◆ Strong port density and scalability.

Because the number of vro interfaces is small, for example, the Cisco7513 vro can provide a maximum E1 port density of only 168) and the price of a single port is high, if you use a vswitch, there is no limit on the number of ports, for example, the density of the 10/100 M port of the ciscow.st12009 switch can reach 336, and more ports can be supported through cascade for more access.

◆ Strong data processing capabilities.

Generally, the packet forwarding rate of A vro is several hundred kpps and the bus bandwidth is 2 Gbps. The packet forwarding rate of A vswitch can reach over mpps, And the backboard bandwidth can be up to 32 Gbps. It can be seen that the data processing capability of layer-3 switches is much higher than that of routers.

◆ Supports multiple protocols.

Like routers, layer-3 switches support multiple network protocols such as IP, IPX, and DECnet, such as RIPRoutingInformationProtocol and routing information protocol), OSPFOpenShortest-PathFirst, and open shortest protocol), access example tables, and so on, vswitches can be implemented, while vswitches have some unique functional vrouters that cannot be implemented.

◆ Redundant channels are supported.

When the redundant channel is the same digital channel, the switch has a unique function that combines two or more identical physical links into one logical link, accumulating bandwidth, as long as one of the links is good, to maintain connectivity. This function is defined as Trunk On 3Com devices and Channel on Cisco devices. Its principles are similar and are implemented at the physical link layer.

When a redundant channel is a digital channel and a simulated channel coexist, a router must be used. To prevent dynamic routing from occupying the WAN bandwidth, the HSRP (HotStandbyRoutingProtocol can be selected on the branch node based on different products. Hot Backup Router Protocol) or VRRP (VirtualRouterRoutingProtocol, vro redundancy protocol), the central end can use RIP or OSPF Dynamic Routing Protocol in the LAN to achieve route information exchange between vrouters and vswitches.

◆ High performance and price ratio.

The performance and price of a router and a vswitch are incomparable. However, the cost of a single-port device on the vro is much higher than that on the vswitch. For example, each port of a vswitch is 10 m ~ 10 thousand M Adaptive, even 155 m optical port can be configured, and a 2 m E1 port of the router is as high as RMB. If the M Port module is used, the price is as high as 10 million RMB.

A vro with a certain number of E1 port access costs RMB 100,000, while a layer-3 medium-and low-end switch requires RMB 100,000, and a high-end core switch only requires RMB. In enterprises with limited economic strength, it is a good way to save costs by adopting a three-tier exchange solution.

Case study of layer-3 Switch Technology

Taking a company's information network as an example, it is a typical star structure that connects the branches of each city with the Headquarters as the center. In this star wide area network topology that is connected to many nodes through digital channels, if the traditional network connection mode is used, there will be two important factors restricting the technical solution, that is, the limited processing capability and high cost of the router equipment. Each company and each city branch has one CISCOC3560E layer-3 switch, and the entire network adopts the OSPF routing protocol. The circuit bandwidth from the headquarters to the branch is a 4 m digital circuit. The telecommunications company first binds two E1 circuits into a 4 m circuit.