Terminal Server
In the early stages of building my lab, I saw no need for a terminal server. In the recent days, switching console cables between two or more devices has become more of a hassle. Even with two USB to DB9 adapters and many more console cables, the time spent swapping cables adds up and sometimes distracts me from the actual lab.
A terminal server is a device that uses a breakout cable of sorts to connect to the console ports of many other devices. What you then do is use one console cable to connect to the terminal server, and initiate Telnet sessions to the other connected devices. In the world of Cisco labs, this terminal server is often a 2511 or 2509 router. These router models have asynchronous interfaces (the 2511 has two), each of which can usually support a terminal connection to eight devices with the proper cable.
Here is a quick list of the hardware that would be required:
- Terminal Server: Cisco Router (2511 or 2509)
- Octal cables
- Console cable and USB to DB9 adapter to console into the router
There are a few things to note. The 2511 and 2509 routers are not your only options. You can use a 2800 series router with the proper network module, however this will cost you considerably more. In addition, the 2511 has two asynchronous ports allowing you to connect up to 16 devices (using two octal cables). If you have more then eight devices, or you plan to expand you lab, the 2511 might be the router for you.
Prices for this stuff will vary. If you’re shopping on E-bay it seems your best bet is to try and scout out a package deal that comes with the router as well as the octal cable(s). Around $200 seems to be the running price for everything. If you are patient, you can find a better deal.
Once I get my terminal server and configure it, I will create a how-to document on configuring one for a lab setting. For now, this following Cisco article will provide the basics.
