Verify that your router has sufficient flash memory and RAM to support this IOS image.
NM-1FE-TX (Fast Ethernet) and NM-16ESW (EtherSwitch Module). Use Cases: C3725-adventerprisek9-mz.124-15.t14.bin Download-
You forgot to set the Idle-PC. Right-click the router → Idle-PC → choose a value that brings CPU usage below 10% when idle. The Importance of Software Updates: A Case Study
C3725: This refers to the specific model of the Cisco router, in this case, the 3725.adventerprisek9: This indicates that the software image is for the Advanced Enterprise Services with IPsec (K9) feature set.mz: This indicates that the software image is a "universal" image, which supports multiple feature sets and can be used on various Cisco router models.124-15: This refers to the specific release of the Cisco IOS software, which is 12.4(15).t14: This is a specific build or patch level for the software release.bin: This indicates that the file is a binary executable file.