Indicates the 48 bits source MAC address. The packet's source
address is AND-ed with the value of caqMacAceSrcMacMask and then
compared against the value of this object. If this object value
is 00-00-00-00-00-00, and the value of caqMacAceSrcMacMask
object in the same entry is ff-ff-ff-ff-ff-ff, this entry
matches any source Mac address.