Intermec MobileLAN 21 Series System Manual page 87

Set the second filter expression as shown below.
The following table explains the values used in the second filter expression.
Parameter Value
ExprSeq 2
Offset 12
Mask ffff
Op EQ
Value ID 1
Action And
Configuring the Ethernet Network
Explanation
This is the second expression.
The data for this expression begins at an offset of 12 bytes from
the beginning of the destination address. (Check for DIX IP frame
type, in this example.)
Check two bytes for an exact match.
Compare the value at the offset to the value specified on the Filter
Values menu to see if they are equal. (If the value at the offset
equals the specified value on the Filter Values menu, the frame is
DIX IP, in this example.)
Use the value from the Filter Values menu whose value ID is 1.
If this filter expression is true, continue to the next expression.
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