CiscoInetAddressMask
Denotes a generic Internet subnet address mask. The Internet subnet address mask is represented as the number of contiguous 1-bit from MSB (most significant bit) of the Internet subnet address mask. A CiscoInetAddressMask value is always interpreted within the context of an InetAddressType value. The InetAddressType only object or InetAddressType with InetAddress objects which define the context must be registered immediately before the object which uses the CiscoInetAddressMask textual convention. In other words, the object identifiers for the InetAddressType object and the CiscoInetAddressMask object MUST have the same length and the last sub-identifier of the InetAddressType object MUST be 1 less than the last sub-identifier of the CiscoInetAddressMask object and MUST be 2 less than the last sub-identifier of the CiscoInetAddressMask object if an InetAddress object is defined between InetAddressType and CiscoInetAddressMask objects. The maximum value of the CiscoInetAddressMask TC is 32 for the value 'ipv4(1)' in InetAddressType object and 128 for the value 'ipv6(2)' in InetAddressType object. The value zero is object-specific and must therefore be defined as part of the description of any object which uses this syntax. Examples of the usage of zero might include situations where Internet subnet mask was unknown, or when none subnet masks need to be referenced.