I'm trying to upload an IOS upgrade for a Cisoc 1811 router via tftp through telnet. The upgrade isn't overly large (approx. 24 MB) but the connection to the tftp server keeps timing out in less than 5 minutes after connecting. The error I get in the telnet window is: "%error reading from //*tftp server address*/*IOS update.bin* (connection timed out)". After I get the error I have to close the telnet window and disconnect from the VPN, I am managing the router remotely and need to VPN into it (using SSL VPN/AnyConnect), reconnect the VPN and then reestablish the Telnet connection. I have talked to Cisco's tech support and they had indicated that doing this process remotely wouldn't be a problem.
I have this problem too.