h3cAclIPAclAdvancedSrcPrefix 1.3.6.1.4.1.43.45.1.10.2.8.2.2.3.1.8

Denotes the length of a generic Internet network address prefix. A value of n corresponds to an IP address mask which has n contiguous 1-bits from the most significant bit (MSB) and all other bits set to 0.