Indicates what field of Tos octet in the packet header
to be matched.
none(1) means that there is no need to match the ToS octet.
matchDscp(2) means that the DSCP value of packet header need
to be matched. If this value is specified, the caqIpAceDscp
object in the same row should be configured.
matchIpPrec(3) means that the IpPrecedence value of packet
header need to be matched. If this value is specifed, the
caqIpAceIpPrec object in the same row should be configured.