How to Backup Cisco IOS Image to TFTP Server

You can easily backup the IOS images of network devices such as Router and Switch to a TFTP server and restore it later.

How to Backup Cisco IOS Image to TFTP Server

How to Backup and Restore Cisco Router IOS

In our previous article, we backed up the configuration files of Cisco’s Router, Switch devices to TFTP. In this article, we will copy the system files of network devices onto a TFTP server located on the network.

In this article, we will perform a backup on a more specific network using GNS3 and VMware virtual machines.

First, install TFTP Server and then configure VMnet settings according to the network topology you created. Then add the TFTP server to the topology.

How to Save the Router’s IOS Image to TFTP

For Cisco IOS backup, follow the steps below.

   Step 1

First, open the GNS3 program and create a new project, then create a topology like in the image below.

A Cisco Router and Virtual Computer Connected to a Switch

   Step 2

Run your TFTP Server and verify that the service is running after starting SolarWinds.

SolarWinds TFTP Program

   Step 3

Now, view the server’s C:\TFTP-Root folder and check that it is empty.

C:\TFTP-Root

   Step 4

Use the show flash: command on the Router to see if it has an image.

If there is no file or image file, you can copy the IOS image from TFTP to Router with the copy tftp: flash: command to test it.

R1# copy flash: tftp:
Source filename []? c3725-adventerprisek9_ivs-mz.124-25a.bin
Address or name of remote host []? 192.168.8.5
Destination filename [c3725-adventerprisek9_ivs-mz.124-25a.bin]?
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
39315264 bytes copied in 771.024 secs (50991 bytes/sec)
R1#

 
Source Filename ⇒ The name of the IOS image on the Cisco Router.
Address or Name of Remote Host ⇒ The name or IP address of the remote computer.
Destination Filename ⇒ Leave blank by default. It will be saved with the file name specified in [].

R1# copy flash: tftp:

   Step 5

After copying the IOS image to the server, you can review the log output on the Router.

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
39315264 bytes copied in 771.024 secs (50991 bytes/sec)

 
IOS Copied to TFTP

   Step 6

You can view the image saved in the root folder of the TFTP server from the image below.

Checking the TFTP Root Folder

   Step 7

You can see that the IOS image you are reviewing has been copied successfully.

Checking TFTP Log Output on Router

Show Commands

R1#show running-config
Building configuration...

Current configuration : 920 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
no ip icmp rate-limit unreachable
ip cef
!
!
no ip domain lookup
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
!
!
!
!
ip tcp synwait-time 5
!
!
!
interface FastEthernet0/0
ip address 192.168.8.1 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
no cdp log mismatch duplex
!
!
!
control-plane
!
!
!
gatekeeper
shutdown
!
!
line con 0
exec-timeout 0 0
privilege level 15
logging synchronous
line aux 0
exec-timeout 0 0
privilege level 15
logging synchronous
line vty 0 4
login
!
!
end

R1#

 

R1#show flash:

System CompactFlash directory:
File Length Name/status
1 39315264 c3725-adventerprisek9_ivs-mz.124-25a.bin
[39315328 bytes used, 11016316 available, 50331644 total]
49152K bytes of ATA System CompactFlash (Read/Write)

 

R1#copy flash: tftp:
Source filename []? c3725-adventerprisek9_ivs-mz.124-25a.bin
Address or name of remote host []? 192.168.8.5
Destination filename [c3725-adventerprisek9_ivs-mz.124-25a.bin]?
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
39315264 bytes copied in 771.024 secs (50991 bytes/sec)
R1#

R1#show flash: detailed

System CompactFlash directory:
File Length Name/status
addr fcksum ccksum
1 39315264 c3725-adventerprisek9_ivs-mz.124-25a.bin
0x40 0xA7A1 0xA7A1
[39315328 bytes used, 11016316 available, 50331644 total]
49152K bytes of ATA System CompactFlash (Read/Write)

 

R1#show flash: summary
Partition Size Used Free Bank-Size State Copy Mode
1 49151K 38393K 10758K 0K Read/Write Direct
49152K bytes of ATA System CompactFlash (Read/Write)

 

IOS Backup and Restore ⇒ Video

You can watch the video below for backup and restore of the router system file and also subscribe to our YouTube channel to support us!

   Final Word


In this article, we have examined how to back up and restore IOS files of network devices to a server. Thanks for following us!

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One Comment

  1. Avatar for Abir Abir 24 November 2018

    I want to install ASA. Which version of ASA & Gns3 is suitabl.

    Reply

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