 A Cisco console cable is used to connect a computer system directly into a networking device, such as a switch or a router… Show
When you got a new Cisco router, Cisco switch, or Cisco firewall and hooked it up, does it work? No. It isn’t like a Linksys or Netgear router. It has no DHCP or anything like that. It has to be configured first. How do you configure it? You have to connect to the console port, like this console port on a Cisco 1800 series router: But what can connect to it? No, don’t use an Ethernet cable – it won’t work. This is a SERIAL port that needs to go to the serial/COM port on your PC or laptop (if you still have one). What what you need is a ROLLED cable. Here is what it looks like: Cisco also has a good picture of one as follows: However, how are you going to get that rolled cable connected to your PC? Don’t plug it into the Ethernet port! Remember, it is a Serial Cable. You need to connect it to the 9 PIN serial port on your PC (hopefully you have one but I will tell you what to do if you don’t in a minute. To connect it, you need to convert the RJ45 end to Serial with an adaptor, like this: Many times, these came with routers or were sold in a package alone with the rolled cable, like this: Today, the DB9 to RJ45 converter is coming molded to the console cable, like this: Once you have the router, switch, or firewall physically connected with the right cable & adaptor, you need to use your terminal emulator to communicate with the console port. For more information on that topic, I recommend this article on how to use Hyperterminal to connect to your Cisco router. Notes: Types of Cisco Console Cables Cisco cables, including DTE Serial Cables, for connecting your Router to a DTE (Data Terminal Equipment); DCE Serial Cables, for connecting your Router to a DCE (Data Communications Equipment); DTE Smart Serial Cables, for connecting your Router to a DTE (Data Terminal Equipment); DCE Smart Serial Cables, for connecting your Router to a DCE (Data Communications Equipment); Aironet Cables, related to Cisco’s Aironet product range, including; Antenna extension, Low Loss cables, etc. Cisco Console Cables, Rolled and Straight
More Related: How to Make Cisco Console Cables?
Connecting a computer running HyperTerminal emulator software to the console port of a router lets you access router information and modify settings without using the device’s Web-based configuration utility. Many routers ship with the necessary console cables and adapter to facilitate a direct connection. If not, you’ll usually need an RJ-45 to RJ-45 rollover cable with one or two adapters. RJ-45 to RJ-45 Rollover Cable
Console Port Adapter
PC Serial Port Adapters
Sourcing Adapters and Cables
This chapter provides information and commands concerning the following topics: Connecting a Rollover Cable to Your Cisco Router or SwitchFigure 1 shows how to connect a rollover cable from your PC to a router or switch. Figure 1 Rollover Cable Connection Using a USB Cable to Connect to Your Cisco Router or SwitchOn newer Cisco devices, a USB serial console connection is also supported. A USB cable (USB type A to 5-pin mini type B) and operating system driver are needed to establish connectivity. Figure 2 shows a Cisco device that can use either a mini-USB connector or a traditional RJ-45 connector. Figure 2 Different Console Port Connections
Terminal SettingsFigure 3 illustrates the settings that you should configure to have your PC connect to a router or switch.
Figure 3 PC Settings to Connect to a Router or Switch LAN ConnectionsTable 1 shows the various port types and connections between LAN devices. Table 1 LAN Connections
Serial Cable Types
Figure 4 shows the DB-60 end of a serial cable that connects to a 2500 series router.
Figure 4 Serial Cable (2500 Series) Figure 5 shows the newer smart serial end of a serial cable that connects to a smart serial port on your router. Smart serial ports are found on modular routers, such as the newest ISR series (4xxx), older ISR series (x9xx), (x8xx), or on older modular routers such as the 17xx or 26xx series. Smart serial ports on modular routers have to be purchased and installed separately, and are not part of the baseline configuration. Figure 2 shows a smart serial card installed into the EHWIC 0 slot on a 1941 series router.
Figure 5 Smart Serial Cable (17xx, 26xx, ISR 18xx, 19xx, 28xx, 29xx, 4xxx) Figure 6 shows examples of the male DTE and the female DCE ends that are on the other side of a serial or smart serial cable.
Figure 6 V.35 DTE and DCE Cables Most laptops available today come equipped with USB ports, not serial ports. For these laptops, you need a USB-to-serial connector, as shown in Figure 7.
Figure 7 USB-to-Serial Connector for Laptops Figure 8 shows an example of a USB type A to 5-pin mini type B cable used for connecting a PC/laptop with a USB port to the USB port on a Cisco device.
Figure 8 USB Type A to 5-Pin Mini Type B Cable Which Cable to Use?Table 2 describes which cable should be used when wiring your devices together. It is important to ensure you have proper cabling; otherwise, you might be giving yourself problems before you even get started. Table 2 Determining Which Cables to Use When Wiring Devices Together
Table 3 lists the pinouts for straight-through, crossover, and rollover cables. Table 3 Pinouts for Different Cables
ANSI/TIA Cabling StandardsANSI/TIA-568 is a set of telecommunications standards that addresses commercial building cabling for telecommunications products and services. The current standard is revision D (2017), which replaced the 2009 revision C, the 2001 revision B, the 1995 revision A, and the initial issue of T568 in 1991. All of these past revisions and the initial issue are now obsolete. T568A Versus T568B CablesOne of the most known and discussed features of the ANSI/TIA-568 standard is the definition of the pin assignments, or pinouts, on cabling. Pinouts are important because cables do not function properly if the pinouts at the two ends of a cable are not matched correctly. There are two different pinout assignments: T568A and T568B. The difference between these two standards is pin assignments, not in the use of the different colors (see Table 4). The T568A standard is more compatible with voice connections and the Universal Service Order Codes (USOC) standard for telephone infrastructure in the United States. In both T568A and USOC standards, the blue and orange pairs are now on the center four pins; therefore, the colors match more closely with T568A than with the T568B standard. So, which one is preferred? Information from the standards bodies on this matter is sketchy at best. T568B was traditionally widespread in the United States, whereas places such as Canada and Australia use a lot of T568A. However, T568A is now becoming more dominant in the United States, too. There is no hard-and-fast rule about which standard to use. It will usually depend on the company you work for and their preferences. Just be consistent. If you are on a job site that uses the B standard, then continue to use B; as I previously mentioned, the A standard more closely aligns with traditional telephone infrastructure, so some installers prefer the A standard. Table 4 UTP Wiring Standards
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What is a type of cable that use to connect console device to router or Switch for configuration?
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