Allied Telesis AT-WA7500 User Manual
Page 75
AT-WA7500 User’s Guide
75
This parameter works with the Action parameter; for example, if
the action is set to And, then the next sequence in another
expression is processed.
Offset
Identifies a point inside the frame where testing for the
expression is to start. The range is from 0 to 65535.
Mask
Applies a data pattern to the frame. If the data pattern in the mask
matches the frame, then the specific action is performed. The
mask indicates the bits that are significant at the specified offset.
A bit is significant if a bit in the mask is set to one. If this field is
empty, the length of the field is determined by the longest value
in the Filter Values menu for the specified value ID. The mask
values are entered in hexadecimal pairs. You can enter 0 to 8 pairs.
Op (Operation)
Performs a logical operation when a data pattern matches a value
in the Filter Values menu to determine if the specified action
should be taken. Valid operations include: EQ (equal), NE (not
equal), GT (greater than), LT (less than or equal)
Value ID
Represents a value in the Filter Values menu. The bytes after the
frame offset are compared to the data pattern indicated by the
value. Value ID can be from 0 to 255 and must match one or more
value IDs in the Filter Values menu.
Action
Sets the action to Pass, Drop, or And. If you set the action to And,
the filter expression with the next highest sequence is applied.
4. Select Submit Changes to save your changes. To activate your
changes, select Save/Discard Changes from the menu bar then Save
Changes and Reboot. For help, see Saving Configuration Changes
on page 41.