Introduction to router interfaces and connections

Vro interfaces are very important for network connection and routing functions. Here we will give a comprehensive explanation of vro interfaces and connection knowledge. A vro has powerful network connection and routing functions. It can be physically connected to a variety of different networks, which makes the router interface technology very complex, the more high-end router interfaces there are, the more network types it can connect. Vro ports include LAN ports, WAN ports, and configuration ports.

LAN interface

Common Ethernet router interfaces include AUI, BNC and RJ-45 interfaces, as well as FDDI, ATM, Gigabit Ethernet and so on have corresponding network router technology, the following describes the main LAN interfaces.

AUI Port

The AUI port is the router interface used to connect to the coarse coaxial cable. It is a "D" Type 15-pin interface, this is one of the most common ports in the ring or bus network. The router can connect to the 10Base-5 network through a coarse coaxial cable transceiver. But more is the use of external transceiver AUI-to-RJ-45), to achieve the connection with the 10Base-T Ethernet. Of course, you can also use other types of transceiver to connect to the 10 base-2) or 10 base-f sub-coaxial cable.

RJ-45 Port

RJ-45 port is our most common port, it is our common twisted pair Ethernet port. Because in Fast Ethernet also mainly uses twisted pair as transmission medium, according to the port communication rate of different RJ-45 port can be divided into 10Base-T network RJ-45 port and 100Base-TX network RJ-45 port two types. Among them, the RJ-45 port of the 10Base-T network is usually identified as "ETH" in the router, while the RJ-45 port of the 100Base-TX network is usually identified as "10/100 bTX ".

SC Port

The SC port is also known as an optical fiber port. It is used to connect to the optical fiber. An optical fiber port is usually used to connect to a vswitch with an optical fiber port, instead of directly connecting to a workstation using a optical fiber. Instead, it is connected to a vswitch with a optical fiber port, such as a fast Ethernet or Gigabit Ethernet. This type of port is generally available in high-end routers and is marked with "100b FX.

WAN router interface

As mentioned above, vrouters can not only achieve the connection between the LAN, but also the connection between the LAN and the Wan, and between the WAN. However, because the wide area network is large and the network environment is complex, the speed requirement of the port used by the router to connect to the wide area network is very high. In Ethernet, the speed requirement is generally above Mbps Fast Ethernet. The following describes several common WAN router interfaces.

RJ-45 Port

The RJ-45 port can also be used to establish a connection between the WAN and lan vlan Virtual LAN) and to the remote network or the Internet. If you use a router to provide routes for different VLANs, you can directly connect to different VLAN ports using twisted pair wires. But pay attention to here the RJ-45 port connected to the network is generally not very can be 10Base-T this, generally is more than Mbps Fast Ethernet. If you need to connect to a remote network through optical fiber, or connect to other types of ports, you need to use the transceiver to connect to each other.

AUI Port

We have also discussed the AUI port in the LAN. It is a network router interface used to connect to the coarse coaxial cable. In fact, the AUI port is also commonly used to connect to the WAN, however, this type of router interface is rarely used in the WAN. This port is mainly used to connect to network connection modes such as DDN, Frame Relay, X.25, and PSTN analog telephone lines. Sometimes DDN or X.25 or other WAN connection technologies are used for leased line connection between enterprise networks. This type of synchronization port generally requires a very high speed, because in general, both ends of the network connected through this port require real-time synchronization.

Router configuration interface

Vro interfaces have two configuration ports: "Console" and "AUX". "Console" is usually used for basic vro configuration through a dedicated connection with a computer, "AUX" is used for vro remote configuration and connection.

Console Port

The Console port uses a dedicated connection to directly connect to the serial port of the computer, and uses the terminal simulation program, such as the "Super Terminal" in Windows) for local configuration of the router. The Console port on the router is mostly a RJ-45 port. As shown in figure 10, a Console Configuration Port is included.

AUX port

The AUX port is an asynchronous port. It is mainly used for remote configuration, dial-up, and MODEM connection. The AUX port and Console port are usually provided at the same time because they are used differently.