download IOS from tftp to router

[shuxiao.r]

Hello Cisco Community,

I am currently on a Internship at an college, and gotten a assignment to update the firmware of a cisco 2611 router.

after i got my hands on the firmware and fired up the tftp server and attempted to push the upgrade to the router it gave me a memmory insufficiency error.
at that point 2 days have passed so i decided to continue on other date, however now i came back to it the  the copy command doesnt seem to work and gives me a error opening "said file" (timed out)

i double checked if i was using the same command and if i have connection to the tftp server, and everything seems fine.

anyone have an idea what might be wrong?

[Seb Rupik]

Hi there,

On the TFTP server have you selected the correct root folder which contains the IOS file?

cheers,

Seb.

[shuxiao.r]

that is correct, just double checked.

[Seb Rupik]

Is there a firewall/ iptables configured on the TFTP server. Is the traffic to the TFTP service permitted? Can you try disabling the firewall?

[shuxiao.r]

i have disabled all firewalls and granted all access permissions. still doesnt work.

[Seb Rupik]

Can you run tpdump/ wireshark on the TFTP server to confirm that the request from the router is arriving at the server?

Can you also share the input/ouput you are getting from the router console when you start the TFTP process?

cheers,

Seb.

[Joseph W. Doherty]

". . . router it gave me a memmory insufficiency error."

Do you have sufficient free flash space to contain the replacement IOS? Often you need to remove the current/running image, from flash, to have sufficient free space. Also, sometimes the device's flash, even if fully empty, isn't sufficiently large to contain a later IOS version and/or one with additional software features. Lastly, some of the very old IOS versions don't actually free space by just deleting it from flash, after deleting a file you also need to "compress" flash too.