Allied Telesis AT-WA7501 - Manual (Page 82)

Chapter 3: Configuring the Ethernet Network
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For more examples of using Ethernet filters and for help configuring IP
filters, see “Configuring IP Tunnel Filters” on page 150.
Using Ethernet Frame Type Filters
You can define filters for common networking protocols such as IP, Novell
IPX, and 802.2 LLC. You can also set filters that will pass only those
Ethernet frame types found on your network.
You can set the default action for general and specific frame types. For
example, you cannot pass the DIX-Other EtherTypes frame parameter
and then use the subtype menus to pass only those specific DIX types that
are used in your radio network.
You can also set the scope for general and specific frame types. For
example, for DIX-IP-TCP ports, you cannot pass all frame types. Then, all
IP frames with the TCP type will be dropped even if specific TCP parts are
set to pass in the subtype menus.
Here is the action and scope you can set for each parameter:
Allow/Pass: Check or clear this check box. Check the check box to pass
all frames of that type. Clear the check box to drop all frames of that type.
Scope: Set scope to Unlisted or All. If you select All, then all frames of that
type are unconditionally passed or dropped, depending on the action you
specified. If you select Unlisted, then frames are passed or dropped only if
the frame type is not listed in the predefined or customizable tables.