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Chapter 3: Configuring the Ethernet Network
80
Configuring Ethernet Filters
You can set both Ethernet and IP tunnel filters, and you can create
protocol filters for both predefined and user-defined protocol types. In
addition, you can define arbitrary frame filters based on frame content.
Setting Ethernet filters prevents the Ethernet port from sending out
unnecessary traffic to the wireless network.
Ethernet frame type filter and predefined subtype filter settings override
customizable subtype filter settings. However, Allied Telesyn recommends
that when creating customizable subtype filters, you do not duplicate
existing frame type or predefined subtype filters or unexpected results
may occur.
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.