: Version 12.4(25)d is widely considered one of the most stable IOS images for emulation. Module Support : The
In enterprise networks, mislabeling a router’s boot image can lead to:
Interestingly, this specific filename still survives today, not on active production networks (the 3660 has long been End-of-Life), but in .
, allowing for a maximum of 24 Ethernet ports, 32 FastEthernet ports, or 24 serial ports. Key Features and Stability This specific image is part of the 12.4 Mainline
Example Cisco IOS versions and idlepc values for GNS3 - GitHub Gist