Router connection method and steps for hardware

For the router connection, I believe many people are aware of, the following mainly for the router hardware connectivity issues, a comprehensive introduction. The application of the router is very broad, it has the type of port is generally more, they are used for their different router connection, if you can not understand the role of the respective ports is likely to make the wrong connection, resulting in incorrect network connectivity, network.

1. Connection between router and LAN access device

LAN devices mainly refer to hubs and switches, the switches typically use only RJ-45 and SC, and hubs use ports that are typically AUI, BNC and RJ-45. Below, we briefly describe how routers and hub devices connect to each other's ports.

(1) rj-45-to-rj-45

This connection means that both ends of the router connection are RJ-45 interfaces, and if both routers and hub devices provide RJ-45 ports, you can use twisted-pair cables to connect the hub device to the router's two ports. It is to be noted that the connection between the router and the hub device does not use a crossover line, but rather a straight line, that is, the line sequence at both ends of the jumper is identical, but it does not mean that as long as the line sequence is the same, for the 100Mbps network uses 100Mbps Exchange method, Refer to the previous chapter of this tutorial for details. One more note is that the cascade between the hub devices is usually done through a cascading port, and that the interconnection between routers and hubs is done through a normal port. In addition, the router and hub device port communication rates should match as much as possible, otherwise, the port rate of the hub device is better than the router rate, and the router is best connected directly to the switch.

(2) aui-to-rj-45

This situation occurs primarily when a router is connected to a hub, and if the router has only a AUI port and the hub device provides a RJ-45 port, it must be aided by the aui-to- The RJ-45 transceiver enables the connection between the two. Of course, the UTP jumper between the transceiver and the hub device must also use a straight line. This is typically a router connection between a router and a switch, such as a switch that has only a fibre port, and the routing device provides a RJ-45 port or a AUI port, and the connection between the two can be achieved by means of a sc-to-rj-45 or Sc-to-aui transceiver. The UTP jumper between the transceiver and the switch device must also use a straight line. However, the fact that the switch is a pure fiber interface is very rare.

2. Connection of routers to Internet access devices

As we know above, the more important application of routers isInternet connection, this situation in a, public institutions LAN Internet access in the case of the most used, and is an essential equipment. Routers and Internet access device router connection is mainly as follows:

Connect through the asynchronous serial port

This asynchronous serial port we have introduced earlier, it is mainly used to set up with the modem router connection, for the realization of remote computers through the public telephone network dial into the local area network. In addition, it can be used to connect other terminals. When a router is connected to the modem through a cable, it must be connected using a AYSNC-TO-DB25 or AYSNC-TO-DB9 adapter. There are more types of synchronous serial ports that can be supported in routers, such as Cisco Systems that can support 5 different types of interfaces, namely eia/tia-232 interface, eia/tia-449 interface, v.35 interface, x.21 Serial cable assembly and EIA-530 interface, corresponding to the adapter. It is important to note that, generally speaking, the adapter line ends with a different shape (generally called the end of the pin is called "male head", an end with a hole is usually called a "parent", but there are exceptions, the "EIA-530" interface is the same interface type at both ends, which is mainly due to the tightness of the connection, See figure 16. The "male heads" of the remaining types of interfaces are DTE (data terminal equipment, Terminal equipment) connection adapters, and "parent" for DCE (data communication device, information Communications equipment) connection adapter. 3lian.com

ISDN BRI Port

We've already introduced ISDN in the area of Internet access, and it does bring some viable solutions, and the development design of the router is specifically designed to provide the appropriate modules for the connection to the ISDN device, And a special port is reserved. The ISDN BRI module of the Cisco router can generally be divided into two categories, one is ISDN BRI s/t module and the other is the ISDN BRI U module, which must be connected with the NT1 terminal equipment of ISDN to connect to the Internet router because the S/T port can only receive digital telephony devices. It is not applicable to connect existing analog telephony devices via NT1. and the latter because of the built-in NT1 module, we call it "nt1+" terminal equipment, its "U" Port can directly connect analog phone outside the telephone, so no need to add ISDN NT1, you can directly connect to the phone line wall socket.