For enterprise users, multi-device port access control can optimize the network more reasonably. Here we analyze in detail how to configure a Cisco router to implement this function. You only need a CISCO router with an asynchronous module or a router with a built-in asynchronous serial port.
You can enjoy full control connections to a series of network devices in a work room or data center. Now let's take a look at how these jobs are done, learn how to manage multiple connections, and look at the security issues you should consider. Are you familiar with this situation? You work with firewalls, routers, and switches at home, but you cannot touch those devices. In the end, you have to drive to the Office to update the Cisco router configuration or restart the device.
So how? When the network crashes, you need to quickly and conveniently access the control ports of all network devices. You will find that you have a laptop running between devices in the rack, and each time you connect to the control port of one of the devices for Cisco router configuration.
However, there is also a simple method to avoid such troubles. Using a CISCO router with an asynchronous module or a router with a built-in asynchronous serial port, you can fully enjoy the control connection to a series of network devices in a work room or data center.
I will start with a Cisco router configuration in the network of the data center, without a doubt, it will make my life easier in the days of trouble. When I need to connect to the control ports of these network devices, I can Telnet to the console server, then Telnet to the device that I want to connect to, or directly Telnet to the control port of the device.
I prefer the first option, because I rarely remember the port number of the device that I needed to Telnet directly. In rare cases of network paralysis, I can directly connect to the control port of the console server, and then access the control ports of all network devices from here. You do not have to use vrouters 2511 to complete this task. However, an old 2511 router Cisco has stopped producing devices of this type) is the cheapest device you can achieve this goal.