a3ComDvmrpAggreRangeIpMask 1.3.6.1.4.1.43.2.28.2.7.1.2

The subnet mask of ccsIpDvmrpAggreRangeIpAddr. It is an integer value representing number of consecutive leading 1s. i.e. if the value is 1, then the subnet mask is 128.0.0.0, if the value is 8 then the subnet mask is 255.0.0.0.