Custom Filter Test Table - IBM Nways 8260 Manual

2. Once you have defined all the desired tests, you must define the tests that
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8260 Multiprotocol Intelligent Switching Hub
This field defines the bits in the received frame, starting at the specified
offset , that should be tested against the contents of the value field. Only
the bits which have a value of B
Logical Operator
The following operators can be used for testing:
Equal
Not_equal
Less_than
Greater_than
Value
This field specifies the 32-bit unsigned value against which the contents
of a frame starting at the specified offset should be compared.
When you install the Multiprotocol Interconnect module (or after a cold start),
the custom filter test table has 64 dummy entries defined for it. To define a
test, select the Modify Entry parameter on this panel. A pop up window will
be displayed, which allows you to define the parameters described above.
Once the entry is defined, select Set Entry to confirm or Cancel to abandon
the operation. An example of a Custom Filter Test Table entry is shown in
Table 39.
Table 39. Custom Filter Test Table
ID Test Filter
Name Start
1 802.3 MAC
This example enables the Multiprotocol Interconnect module to test the
contents of two bytes, starting at offset 12 from the beginning of the MAC
address against the value X DC
called the length or type field. In Ethernet V2 frames, this field always
contains a value higher than 1500, whereas 802.3 frames always contain a
value less than 1500. Therefore, this entry allows you to check and see if the
frame is an 802.3 or Ethernet V2 frame.
should be performed on each port, using the Custom Filter Statement Table .
Note that there is one Custom Filter Statement Table for each port.
To define entries in the Custom Filter Statement Table, select Custom Filter
Statement Table from the Bridge menu . An example of this table is shown in
Figure 159 on page 277.
in the mask will be tested.
Offset Mask
12 FFFF0000
decimal). In Ethernet frames, this is
Operator Value
< 05DC