4006 is a very old product, and not sure if you would have updates on CCO, for the IOS releasess.. In any case for 12.2(25) IOS, you might require a minimum of 12.2(31r)SGA3 ROMMON.. You can downloading the file " ios-promupgrade-122_31r_SGA3 " and see if it solves your issue. CCO shows only ROMMON compatibility information with regards to 4500 series switches as given in this URL:
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...