What is the difference between dedicated network cables and common cabling on the Cisco console?

When routers and switches work normally, you do not need to worry too much about wiring issues. However, when the network encounters problems or changes, wiring knowledge may be of great help to you. In this article, we will introduce you to some basic wiring knowledge, and describe the details of the Cisco console dedicated network cable.

The network cable belongs to the first layer of the Network: physical layer. Only the correct network cable can ensure the normal operation of the network. Incorrect connection may cause network service interruption or packet loss. If you do not have a clear understanding of the entire wiring, it is impossible to control the LAN or WAN or eliminate the faults. In addition, it is important to understand the cable Knowledge mentioned in Cisco Certified Network Engineers (CCNA)/Certified Network technical engineers (CCENT) and other certification tests.

Common knowledge of cabling required by network administrators

A network cable works at the physical layer of the Open Communication System Interconnection Reference Model on the first layer of the network. In addition, on this layer, you can support cables and optical cables depending on the type of cabling you are using ).

Unshielded twisted pair UTP) copper cable can be used for different purposes, in general, it contains an eight-pin RJ45 interface.

A normal Ethernet copper network cable can be used to transmit electrical signals from one end to the other. A direct connection network is used to connect a pc to A vswitch, as shown in Figure.

Figure demonstration diagram provided by the Cisco System

Crosstab Chart B) is a pair of wires used to connect the same device. It can be applied to connections from PCs to PCs, switches to vswitches, or routers to vrouters.

Figure demonstration diagram provided by the Cisco System

Now, let's take a look at the differences between Cisco routers and switches in terms of common cabling?

Cisco console and Auxiliary Port AUX cabling

The wiring of the Cisco network system is slightly different from that of other network systems. Two things should be noticed:

Cisco routers, switches, and firewalls use a special "launch" network cable to connect to the console and Auxiliary ports.

Cisco provides the corresponding smart serial network cable.

One of the most confusing events in Cisco's new concept is console connection. Other small and medium-sized enterprises and home network devices usually do not have such a Console port. Among these devices, they accept the network IP addresses allocated from the Dynamic Host Configuration Protocol, and then configure the network here. Cisco has no network IP address. You must use the Console port and console dedicated network cable to configure the router, switch, or firewall.

A dedicated network cable for the Cisco console is a special network cable. It is not like a common wired Ethernet cable. However, if you do not have a dedicated console network cable, you can select a direct Ethernet network cable, adjust the pin port arrangement order, and then you can get a dedicated console network cable.

Below, you can see the pin ports of dedicated network cables on the console. The dedicated network cable for the console is an "launched" network cable. If you can see the other end from one end, you will find that the network cable is rolled up at the interface, as shown in Figure C.

Figure demonstration diagram provided by the Cisco System

The traditional Cisco console dedicated network interface is of the RJ45-RJ45 type, and you can use a RJ45-DB9 adapter to connect to a PC's serial port COM port. Now, the new Cisco device provides a comprehensive DB9 adapter diagram D for the Cisco console dedicated network cable ). Remember that the console's dedicated network cable transmits data through a serial port.

Figure demonstration diagram provided by the Cisco System

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