Selection of common LAN access Wan Methods

The choice of the common LAN access Wan method, the LAN access Wan method, as the name suggests, the choice of LAN access Wan is to intervene in the internet. This article also introduces more popular related knowledge in the market.

This topic is to discuss how a LAN can access the WAN Internet after the LAN is built. Virtual scenario: A Master Ethernet with 200 MB data points. To meet work requirements, the company plans to use the ddnleased line to connect the LAN to the WAN Internet, and use ISDN or frame relay as the backup line.

This is a small and medium-sized network with a small number of users. We need to solve the problem of how to meet the user's needs with appropriate products. With the advent of the Internet era, setting up an internal LAN alone cannot meet the work needs of many enterprises. More users need to publish information on the Internet or perform information retrieval, connecting an enterprise intranet LAN to the WAN Internet is one of the most common tasks in system integration.

The current virtual environment is a common environment. The reason for setting such a typical environment is that this is an important growth point of current network construction: Small and Medium Enterprise Networks. We all know that Internet is the world's largest international computer wide area network. It contains different LAN types. There are many methods for LAN Access to Wan, such as common dialing, satellite lines, and digital networks.

When a computer LAN accesses a wide area network through a digital data communication network such as DDN, X.25, ISDN, or frame relay, a router is usually used. A vro is one of the most important network interconnection devices. It works at the network layer and is used to interconnect different types of networks. The biggest feature of a vro interconnection network is that each interconnect subnet remains independent, each subnet can use different topologies, transmission media, and network protocols. The network structure is hierarchical.

A router is used to select a route for data exchange between the source node and the target node. It provides various network protocols. The main functions of a router are as follows: (1) network interconnection, vrouters support various LAN and WAN interfaces and are mainly used to interconnect LAN Access to wan. (2) data processing, including grouping filtering, grouping and forwarding, priority, multiplexing, encryption, compression, and firewall; (3) network management. vrouters provide functions including configuration management, performance management, fault tolerance management, and traffic control.

In the past, most enterprises used to build their own internal computer networks to improve work efficiency and work with different departments. However, with the rapid development of Internet, more and more people are paying attention to LAN access or enterprise-built Wan. As a result, the usage frequency of the router is rapidly increased.

There are many vro manufacturers. This market used to be dominated by foreign brands, such as Cisco, 3Com, Cabletron, and Nortel Networks. Nowadays, with the advent of the Internet era, many domestic manufacturers have begun to launch their own brand network products in the market of computer networks with unlimited potential.

From low-tech products to high-tech products, domestic companies have made unremitting efforts to prove their strength, we are delighted to see the emergence of vro products of Huawei, Lenovo, Shida and other brands in the market. Cisco Systems is the leader in router technology. Most of the data flowing over the Internet is sent through Cisco devices, most of which are Cisco routers.

It can be said that the Internet has made Cisco brilliant. Cisco vrouters have a variety of series. In this article, we recommend that you use Cisco 1600 series vrouters for virtual scenarios. Cisco 1600 series routers are customized by Cisco for Small and Medium Network LAN Access to Wan and are ideal for small and medium enterprises.

This is because in addition to a fixed Wan port and a fixed Ethernet port, the Cisco 1600 series also supports a WAN interface card that allows you to add or change WAN ports as needed, it is flexible and provides investment protection.

The Cisco 1601 R-1604 R router has an Ethernet port, a built-in Wan port, and a slot for the optional auxiliary Wan port. The 1605 R router has two ethernet ports and one Wan slot. All models have an optional Cisco IOS Firewall feature set.

It is worth mentioning that the 1600 series supports DDR on-demand dialing technology for ISDN lines. Only when valid data transmission is available, the dial-up connection is enabled and the connection is automatically disconnected when no data transmission is available within the specified time, reduce Line costs. This fully meets the needs of the current virtual scenario. In addition, the 1600 NAT technology allows the entire LAN to access 200 users on the Internet at the same time. The firewall function built in IOS can protect the internal network, it also saves users' investment in security.

Features and competitive advantages of the 1600 series solution: Support for Cisco IOS software; flash memory (PC Card) and memory update features, thus facilitating software maintenance. In addition, Cisco provides vro network configuration tools required for installation at no cost. It is equipped with a graphical Cisco ConfigMaker interface to simplify device configuration and management;

Cisco products use FastStep configuration utilities (GUI-based) to simplify installation and troubleshooting; modular architecture to facilitate investment protection; full IOS support, Cisco industry-standard network solutions; the industrial standard IOS supports a variety of service quality; the interface card is compatible with the 2600,360 0 series, convenient and flexible.

Since its entry into the field of data communication, Huawei has launched a full range of router products. Huawei Technology Co., Ltd. takes the network core technology of Huawei's own brand as the leader and continues to grow and grow, has created an outstanding full range of network products today. Among them, the Quidway R1602 router meets the needs of this period and is a product for small and medium-sized enterprises.

The R1602 interface is rich and flexible, with strong packet processing capabilities and simple configuration and maintenance. Quidway R1602 router has a RJ-45 Ethernet interface, two same/asynchronous serial ports, a backup port. Users can flexibly select networking solutions in various WAN technologies such as PSTN/ISDN, Frame Relay, X.25, and DDN, which is suitable for current backup line requirements;

In addition, it has powerful packet processing capabilities. By adopting advanced CPU technology, efficient real-time multi-task operating system and unique software design, the router's packet processing capability is very powerful; r1602 the router adopts a network management system that complies with international standards: the network management system of the router, complies with international SNMP standards, and complies with the unified network management platform developed by Huawei to facilitate centralized network management;

In addition, the command line user interface provided by the router is configured in both Chinese and English. Following the popular router configuration methods in the industry, you can configure this product without special training, chinese prompt and help information will greatly facilitate domestic users;

In addition, R1602 provides a wide range of network security features, such as firewalls, packet filtering, address translation, AAA, and Radius. Users can select different security policies to form enterprise networks; in addition, R1602 adopts the backup center technology, which significantly increases Network Reliability: the characteristics of synchronous or asynchronous interfaces can be used to back up the leased line on the dial-up line to ensure high-reliability network requirements.

According to the requirements of this scenario, you can also choose Lenovo's LR-2501 router. The LR-2501 router has 1 10 m lan access WAN (LAN) Port, 2 WAN (WAN) port and 1 Console port. Therefore, the features of the backup line are met in this scenario. Wan interfaces support Frame Relay, X.25, PPP, HDLC, and other Wan protocols, provide transmission rates up to T1/E1, and provide network address translation (NAT) functions. Supports PAD (X.3, X.28, and X.29) protocols and provides password protection.

Based on this network application scenario, you can select the 3Com OfficeConnect NETBuilder router, which is one of the most widely used models. OfficeConnect NETBuilder has a 10 BASE-T lanport (LAN port) and two WAN ports (WAN port ).

Each module has a Flex WAN serial port that supports up to 2.048 Mbps (T1/E1 line). There is also a second WAN port of the following type: isdn s/T, ISDN integrated with the NT-1, 56/64 KCSU/DSU, Ft1/T1 CSU/DSU, or the second port is added with a Flex WAN port.

3Com OfficeConnect NETBuilder vro has many advantages, including the ease of installation, the unique Boundary Routing Architecture of 3Com, And the Autostartup function) web links and Web-embedded configuration and management tools make plug-and-play installation easy and easy to use by remote branches;

Extensive security: this series of routers are embedded with an ICSA-Certified Firewall, a network address translation (NAT) that protects internal address security, and support IPSec and MPPE encryption. By supporting all major WAN protocols, the OfficeConnect NETBuilder series routers can adapt to the network of various scales and diversified connection needs, these protocols include Frame Relay, X.25, PPP, ISDN, Async, and SMDS.

This series of routers have flexible migration options to meet the needs of network changes. For example, when a small branch with a VBR develops to require IP/IPX support, the vro can be easily upgraded to an IP/IPX/AppleTalk vro with the on-site software upgrade service, you do not need to change the existing hardware.

If you require extra bandwidth, you can simply upgrade the 56/64 KCSU/dsu wan specification 12x K to the FT1/T1 WAN model 12x T by replacing the CSU/DSU module ). Because the current virtual scenario is a typical network, we can see that the products used in this period are products already formed by various manufacturers through product selection.

At the same time, we can see that the construction of LAN Access to Wan in small and medium-sized enterprises is one of the key tasks of many manufacturers, and almost every vendor has its own related products. It is worth noting that most vendors have also considered the problems of network upgrades for users in the future and launched modular products in succession. This will undoubtedly bring more choices to users and fully protect users' investment. Due to layout issues, this issue lists only a part of many products, hoping to help you.