Cisco 10000 Series Routers

"%Error opening tftp:// config" Error Message Prevention

Document ID: 49683

Updated: Aug 03, 2006



This document provides explanations of service configuration errors encountered during initial hardware bootup when you run Cisco IOS® software.



There are no specific requirements for this document.

Components Used

This document is not restricted to specific software and hardware versions.

The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.


Refer to Cisco Technical Tips Conventions for more information on document conventions.

Problem: Service Configuration Error Messages

Occasionally, during bootup of Cisco hardware through Cisco IOS software, error messages similar to these are displayed:

  • %Error opening tftp:// (Socket error)

  • %Error opening tftp:// (Socket error)

  • %Error opening tftp:// (Socket error)

  • %Error opening tftp:// (Socket error)

These error messages are related to the default service configuration option built into Cisco IOS software, which attempts to access the service configuration files from a network Trivial File Transfer Protocol (TFTP) server.


In order to disable this feature, issue the no service config global command.

Router#config terminal
Enter configuration commands, one per line.  

Router(config)#no service config


Router#copy running-config startup-config

These error messages no longer appear at the next bootup of the router.

Related Information

Updated: Aug 03, 2006
Document ID: 49683