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The router continually tries to load a configuration from the network, and displays error messages on the console similar to the %Error opening tftp://255.255.255.255/network-confg (Timed out) message
A router can continually display the log messages because the service config command is enabled on the router.
These error messages usually occur after the router has performed a Cisco IOS Software upgrade. In the latest version of Cisco IOS Software, the service config command is the default value. Since this is the default value, the service config command line sometimes does not show up in the showrun command output.
To disable the serviceconfig command on the router and stop the log messages from being generated, perform these steps:
Issue the no service config global configuration command, as shown:
Enter configuration commands, one per line. End with CNTL/Z.
router(config)#no service config
Issue the write memory or copy running-config startup-config command.
This is a sample command output:
router(config)#^Z!--- Enter ctrl-z to get back to the main prompt.