tftp

Introduction

The Cisco 837 ADSL / Broadband router like most Cisco routers can have it's software( firmware ) upgraded. Generally this isn't a difficult process but it is a bit fiddly if you haven't done it before. This guide will walk you through this process.

Requirements

Cisco 837 router and Cisco console cable

Fairly obvious really, this is the router you wish to upgrade and the cisco serial cable used to configure the router.

Cisco 837 Firmware image

If you need to backup your network device's (you know Cisco, HP etc) running configuration, one of the most common ways to do this is via a TFTP server. There are various tftp solutions out there and this guide covers setting up a centos box on how to become a tftp server. There a few guides out there already but this one covers Centos 5 Linux specifically.

Step 1.
You need to install the tftp-server service and the xinetd service software using yum.
The xinetd service is required as this controls the tftp server daemon.