As a network engineer, do you have a chance to work with physical equipment? May be not often, here we will share this article with those who are interested in getting familiar with the physical Cisco equipment. We will take the Cisco 2901 as an example.
Cisco's Integrated Service Routers (ISR) are usually utilized by most small to medium sized businesses. These routers are intended to be a general purpose, flexible option for a number of different environments that support a number of different capabilities from simple routing to VoIP and videoconferencing. The Cisco 2901 router is the successor to Cisco’s 2500, 2600 and 2800 series lines of routers. It is 1RU (Rack Unit) in size and is often referred to as a ‘pizza box’ router.
The figure below shows a picture of the front and back of the 2901 router:
In this article we will focus on the hardware setup of a Cisco router. There are a number of different module options that are available for the 2901. The image above is of a 2901 without any additional modules installed. The first thing that any engineer must do with a new router (or new to them) is to configure and update it to meet the needs of its intended role in the network.
To do this the engineer must connect a cable to the Cisco 2901/K9 to access the console of the device. With older routers the only option when connecting to the console was via a custom rollover cable which was then used in combination with a RJ-45 to DB-9 or DB-25 converter which enabled a connection with a serial port on a PC. Since almost all newer PCs (including laptops) no longer have conventional serial ports many companies have developed USB to serial cable adapters which allow a connection to these older devices via a modern USB port. The 2901 has two different available methods of connection; via the older style RJ-45 port and a rollover cable OR via a direct mini-USB connection to the device.
Note:As another wonderful Cisco router, CISCO2921/K9 delivers highly secure data, voice, video, and application services for small offices.