Specify the match-parameter. Only ONE field of packet-match-type must be
filled as part of one match criteria.
For e.g., if match-type is SRC_IPV6, then provide the leaf-attribute <ipv6>
Similarly if match-type is OUTER_VLAN_ID or TRAP_ID, then provide vlan-id or
trap-id value in leaf-attribute <data>
offset-match
data mask len offset-pos
Match up to twelve bytes from a specified offset.
'len' number of bytes are matched starting from 'offset-pos'