I am not sure that I really understand your question. But let me attempt an answer and if I am not on the mark then perhaps you can clarify what you are asking.
New versions of IOS code are maintained by Cisco. Access to the new versions is restricted to routers that are covered by an active maintenance contract (and perhaps in a few other situations such as a security vulnerability). If your router is covered by an active maintenance contract then you (or an authorized person who helps you maintain your router) can download the new code from Cisco and use it to upgrade the router.
On the router the IOS code is stored in flash. If you are authorized to update the code you would download the new code from Cisco to a PC in your network. You would then copy the new code from the PC to the router. And you then might need to update boot system commands to have the router run the new code the next time that it reboots.
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...