Error opening tftp (Timed out) in Cisco Router

I’ve experienced a problem in taking backup of IOS image file from new Cisco Routers.
The TFTP server pings but times out during the backup process.

Router#copy flash: tftp:
Source filename [asr1000rp1-adventerprise.03.07.04.S.152-4.S4.bin]?
Address or name of remote host []?
Destination filename [asr1000rp1-adventerprise.03.07.04.S.152-4.S4.bin]?
%Error opening tftp:// (Timed out)

The TFTP server works perfectly with other nodes and Cisco Switches. But the new Cisco Routers seem not to go well with it out of the box.

Apart from keeping the network very simple between the Router and the TFTP server, changing the tftp-root directory, and ensuring no firewall/anti-virus is in the path, you gotta do one more configuration on the Router.

You should provide the interface that acts as source interface for the tftp service. Similar to that of telnet.

Router(config)#ip tftp source-interface gig0/0/0

After the above command, the IOS System Image uploaded successfully.


About Deepak Devanand

Seeker of knowledge
This entry was posted in Networking and tagged , . Bookmark the permalink.

2 Responses to Error opening tftp (Timed out) in Cisco Router

  1. If you get %Error opening tftp://[…] (No such file or directory) you probably haven’t created an empty file with the exact same name on your tftp server. A TFTP server cannot receive a file from a client unless a file with the same name and with full write permissions already exists in the current working folder.


    • Certainly. However, the problem was that I was unable to upload the IOS image FROM inside the router onto the TFTP server. Haven’t paid attention to the permission at the destination, which is a critical point.


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