Changing A Special Database Filter - Cabletron Systems CSX200 User Manual

CSX Bridge View
Clicking the All Filters button opens a window that displays the Special Filters IO
Table. The bridge uses this table to decide what to do with a frame that matches
the information in a Þlter. If the frame information matches the Þlter information,
and the frame was received at the port speciÞed in the table, the bridge forwards
the frame to the bridge ports listed in the table. See
page
The Apply button in the Filtering Database window lets you save changes to
edited Þlter information. See the next section,
Filter, for Þlter editing procedures.

Changing a Special Database Filter

To enable, disable, or edit the contents of a Special Database entry:
1. In the Special Database window, use the slide bar to display the Filter
2. In the Filter State field, click in the appropriate check box to Enable or
3. In the Receive Port list box, click to select the Port at which a packet must be
4. In the Destination Port list box, click to select one or more ports to which any
By using different combinations of Receive Port/Destination Ports, you can deÞne
multiple conditions for a single Þlter. For example, you can conÞgure a Þlter so that a
NOTE
packet received at port 1 that matches the Þlter conditions is forwarded to port 2, and a
packet received at port 2 that matches the Þlter conditions is forwarded to ports 3 and 4.
To deÞne multiple port conditions, just change the Receive and Destination Port values
for a deÞned Þlter and then click on the Apply button.
5. In the Offset field, enter a value that determines where within the data portion
6. Highlight and type Source and Destination Addresses. An X in an address
7. Highlight and type a 4-digit Type value in the Type field. The Type identifies the
3-18
3-19.
Number you want to edit.
Disable the filter, as desired.
received in order for this filter to be applied. Selecting "All" will allow the filter
to be applied to packets at any received port.
packets matching filter parameters will be forwarded.
of the packet the 64 byte window used for matching should begin.
position serves as a wildcard, forcing a match to any value in that position in
the received packet's address field.
packet type. For example, 8138 identifies a Novell packet. An X in a Type field
serves as a wildcard, forcing a match to any value in that position in the
received packet's Type field.
Viewing the Filter
Changing a Special Database
The Special Database Window
List,