File Extension MIB File Format SNMP MIB file MIB stands for SNMP MIB file. This was last updated in March 2012 By Margaret Rouse Browse File Extensions Alphabetically: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # Ask a Question. Find an Answer. Ask your peers a question about this file extension. Ask a Question snmpwalk to mib conversion Cisco MIB Configuration Change, SNMP Is it possible to retrieve info from MIB files through SNMP?