➜ grep
$ cat error-opening-tftp255-255-255-255network-config-error-message-prevention.md

"%Error opening tftp://255.255.255.255/network config" Error Message Prevention

March 21, 2011 • 1 min read
⚠️ This post is archived. The content is likely outdated and is kept for historical context only.

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

  • %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)

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(config)#exit Router#copy running-config startup-config

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