Lethe's Ccielogs

There is something I often see asked in support forums, even in the one I moderate, and it is the annoying error message you often can see when working with Cisco devices, this is something on by default and I’ll show you how to easily solve this.

It could happen that you see these messages during the startup of a Cisco device :

• %Error opening tftp://255.255.255.255/network-confg (Socket error)
  
• %Error opening tftp://255.255.255.255/cisconet.cfg (Socket error)
  
• %Error opening tftp://255.255.255.255/3620-confg (Socket error) 
  
• %Error opening tftp://255.255.255.255/3620.cfg (Socket error)

All these messages are related to a default IOS behavior which basically will attempt to access service configuration files from a network TFTP server if configured or tyring to broadcast on the newtork to find one.

To disable this default configuration you simply need to input these commands on your router/switch :

Router#config terminalEnter configuration commands, one per line.  

Router(config)#no service config

Router(config)#exit

Router#copy running-config startup-config

 The next time you're going to reboot  your router the error message won't be displayed again. That easy! 

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Daniele Catanesi, aka Lethe, is the mind behing Lethe's Ccielogs. He is a veteran of the IT industry with more than ten years of experience in the various fields. Daniele has been mainly working as IT Architect and Trainer for a lot of Enteprise customers implementing cutting edge technologies and complex solutions. Daniele currently holds various certification among which MCITP, CCNP, LPI, Citrix and working tirelessly to his RHCE and RHCA. When he is not busy working or studying for the next exam he writes on the blog trying to give administrators and students around the world tips and suggestion to help them succeed in their career and job.