Information
Specify the IP address of an interface as the source address for TFTP connections.
Rationale:
This is required so that the TFTP servers can easily identify routers and authenticate requests by their IP address.
Solution
Bind the TFTP client to the loopback interface.
hostname(config)#ip tftp source-interface loopback {loobpback_interface_number}
Impact:
Organizations should plan and implement trivial file transfer protocol (TFTP) services in the enterprise by setting 'tftp source-interface loopback', which enables the TFTP servers to identify routers and authenticate requests by IP address.
Default Value:
The address of the closest interface to the destination is selected as the source address.
References:
http://www.cisco.com/en/US/docs/ios-xml/ios/fundamentals/command/F_through_K.html#GUID-9AA27050-A578-47CD-9F1D-5A8E2B449209