diffServMacAceSourceIpAddrBitmask — Multiple manufacturers; see the original MIB MIB copies (LibreNMS/Observium Community), Edgecore MIB copies (Observium Community)
If the diffServMacAceEtherTypeOp is equal(2), diffServMacAceEtherTypeBitmask is 'FFFF'h, and diffServMacAceMinEtherType is '0800'h, this specifies source IP address mask. The packet's source address is AND-ed with the value of diffServMacAceSourceIpAddr and then compared against the value of this object.