Cisco CCNA CCNP Home Lab Tutorial Configuring An Access Server

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Cisco Home Lab Tutorial: Configuring an Access Server

Overview

Expanding your CCNA or CCNP home lab with an access server, like the Cisco 2509 or 2511, is a wise investment. However, setting it up can be a bit tricky. In this guide, learn how to effectively configure and troubleshoot your access server with insights from Chris Bryant, CCIE

12933.

Configuration Basics

Here’s a snippet from an access server configuration:

```plaintext
ip host FRS 2006 100.1.1.1
ip host SW2 2005 100.1.1.1
ip host SW1 2004 100.1.1.1
ip host R2 2002 100.1.1.1
ip host R1 2001 100.1.1.1
ip host R3 2003 100.1.1.1

interface Loopback0
ip address 100.1.1.1 255.255.255.255
no ip directed-broadcast
```

This IP Host table is essential. Your PC connects to the access server, which links to your routers and switches via an octal cable. The cable splits into eight RJ-45 connectors to attach to console ports. For example, connector 1 goes into R1’s console port, connector 2 into R2, and so on.

The loopback address must match the IP Host table for reverse telnet sessions to work.

Opening Reverse Telnet Sessions

To start a reverse telnet session, type the device name and press Enter twice. You’ll see a connection like this:

```plaintext
Access_Server

r1

Trying R1 (100.1.1.1, 2001)... Open
R1#
```

Return to the access server with `` followed by `x`. You can now open connections to all devices.

After opening the session lines, use numbers to reconnect:

```plaintext
Access_server

1

[Resuming connection 1 to r1 ... ]
R1#

Access_server

2

[Resuming connection 2 to r2 ... ]
R2#

Access_server

3

[Resuming connection 3 to r3 ... ]
R3#
```

Entering the full hostname again causes an error because the connection is already open.

Important Configuration Note

Add this crucial part to your access server configuration:

```plaintext
line 1 8
no exec
transport input all
```

The line numbers can vary based on your access server. The `no exec` command is vital to prevent unwanted EXEC sessions from causing connection refusals. Including this command will help you avoid common errors like "connection refused by remote host."

Conclusion

Configuring an access server enhances your home lab’s efficiency and functionality. Following these steps ensures smooth operation, helping you focus on your CCNA or CCNP preparation without unnecessary hassles.

You can find the original non-AI version of this article here: Cisco CCNA CCNP Home Lab Tutorial Configuring An Access Server.

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