Hi Richard,
You will need to configure IP connectivity between the 2 routers on the f0/0 interfaces.
Router 1
!
int f0/0
ip add 192.168.0.1 255.255.255.252
no shut
!
Router 2
!
int f0/0
ip add 192.168.0.2 255.255.255.252
no shut
!
The router with wanted IOS will need to become a tftp server
!
tftp-server flash:my-ios-file.bin
!
On the other router copy the file accross using tftp
copy tftp flash
192.168.0.1
my-ios-file.bin
Regards,
Alex.
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