Uploading/Downloading Cisco IOS on Ubuntu Linux

[prashant1990]

What is a good way to upload an cisco IOS image from Ubuntu Linux laptop to cisco router/switches and to download a cisco IOS image from the cisco router/switch to the Ubuntu Linux laptop for making backup of the running IOS image? The upload needs to be done because I want to upgrade the cisco IOS on the router/switch in question remotely and also the download of the IOS from the router/switch to the Linux box will be done on the network.

[Flavio Miranda]

Hello @prashant1990

Install a TFTP server on your Ubuntu and you´ll be ready to go:

sudo apt-get install xinetd tftpd tftp

Create /etc/xinetd.d/tftp and put this entry

service tftp
{
protocol = udp
port = 69
socket_type = dgram
wait = yes
user = nobody
server = /usr/sbin/in.tftpd
server_args = /tftpboot
disable = no
}

sudo mkdir /tftpboot
sudo chmod -R 777 /tftpboot
sudo chown -R nobody /tftpboot

sudo /etc/init.d/xinetd stop
sudo /etc/init.d/xinetd start

On Cisco device you can run copy flash:'file' tftp or copy tftp flash:

-If I helped you somehow, please, rate it as useful.-

[prashant1990]

I wanted to know if sftp is possible? And also tftp has file size limits. You can't upload the iOS xe images which are 300 to 350 megs.

[johnd2310]

Hi,

yes, you can use sftp. 

• enable scp on the switch using command "ip scp server enable"
• install and configure ssh server  on Ubuntu
• configure a user account on Ubuntu
• copy ios image to home folder of Ubuntu user account
• use Ubuntu user account on copy ios image to/from switch

Thanks

John

[Leo Laohoo]

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@prashant1990 wrote:

and also the download of the IOS from the router/switch to the Linux box will be done on the network.

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Download the IOS from the router/switch to the Linux box?  That does not make sense.  

If you want the IOS and ensured it's not corrupt, go to the Cisco website and download it.