User`s manual

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Source MAC Mask This is the mask used to decide how many
bits are checked in Source MAC Address.
Destination MAC Address A packet belongs to SET-1 then the result
that the Destination MAC Address of its
header binary-AND to the Destination MAC
Mask must equal to the result that this field
binary-AND to the Destination MAC Mask.
Destination MAC Mask This is the mask used to decide how many
bits are checked in Destination MAC Address.