You must ensure unique names for your MIB files. All custom MIBs to be used with SMA are in the same namespace as the standard MIBs, even if you keep the custom MIBs in a separate directory. Most of the MIBs derived from RFCs have RFC numbers in their names to clearly identify the MIBs, and ensure unique names. Other MIBs follow naming conventions, which decrease the chances of duplicate names.
MIBs are usually named with the following conventions:
Use all uppercase letters, and use hyphens to separate segments of the file name.
Begin the MIB name with your company name. For example, if the MIB is for a company that is named Acme, the first segment of the MIB name might be ACME.
Indicate the type of objects in the middle of the name. For example, if the MIB is for a router, you could use ROUTER in the middle of the name.
Include MIB as the last segment of the name.
Append a .txt file extension.
A sample name that uses these conventions is ACME-ROUTER-MIB.txt.