Cisco CCNA / CCNP Home Lab Setup: How To Configure Reverse Telnet

Sometimes, during your CCNA and CCNP studies, you are going to encounter a term that simply does not really make sense to you. (Ok, more than sometimes!) 1 such expression is”reverse telnet”. As a Cisco certification candidate, you are aware that telnet is a protocol which lets you remotely connect to a device like switch or a router. However, what is”reverse telnet”, and why is it important to some Cisco CCNA / CCNP home lab arrangement? More info

Where a telnet session has been initiated with a remote user that would like to remotely control a router or switch, a reverse telnet session is initiated while the host apparatus itself imitates the telnet session.

At a CCNA / CCNP home lab, reverse telnet is configured and utilized on the access server. The access server is not a white box machine such as most people are utilized to; an access server is a Cisco router which permits you to link to multiple switches and routers with a single session without needing to transfer a rollover cable from device to device.

Your entry server may use an octal cable to attach to another routers and switches in your house lab. The octal cable includes one big sequential connector which will connect into the access server, and eight rj-45 connectors which will connect to some other house laboratory apparatus. Your access server requires an IP Host table so as to execute reverse telnet.

An IP Host table is not difficult to put together (and you know how to compose you to pass the CCNA! ) ) . The IP Host table is used taking the position of a DNS server. A entry server IP Host table looks like this:

This setup will enable you to utilize your access server to link to five routers, a frame relay switch, and a change without moving a cable. If you type”R1″ in the console lineup, by way of instance, you’re going to be linked to R1 via reverse telnet. When you’ve got a laboratory, an entry server is a superb investment and a true timesaver. And you can connect from locations that are distant!

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