How to prevent "%Error opening tftp://255.255.255.255/..." Error Message in Cisco Router?

During bootup of Cisco hardware through Cisco IOS software, error messages similar to below are displayed when you erase configuration and re-configure the cisco router as fresh new while WAN Link is connected and running:

Router#
%Error opening tftp://255.255.255.255/cisconet.cfg (Timed out)
%Error opening tftp://255.255.255.255/router-confg (Timed out)

%Error opening tftp://255.255.255.255/ciscortr.cfg (Timed out)
%Error opening tftp://255.255.255.255/network-confg (Timed out)
%Error opening tftp://255.255.255.255/cisconet.cfg (Timed out)
%Error opening tftp://255.255.255.255/router-confg (Timed out)

or

Router#
%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 solve this error message, need to disable that built in feature. To do that, issue the no service config global command as shown below sample,

Router#configure 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 then.

May you all be happy.
(Be knowledgeable, pass it on then)

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