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Filter Commands LSB4 Reference Manual
6-2
Configuring a Filter List
To configure a filter list, the filter list must be associated with one of the LSB4Õs
LAN ports.
The LSB4 can only have as many filter lists as it does LAN ports; as it has four
ports, it can support a maximum of four filter lists. A single filter list can be as-
sociated with one or all ports. To link a port with a filter list, use the
Set Switch
Filter command, as in the following example [Figure 6-1].
Figure 6-1: Set Switch Filter Command
The above example indicates that port two will be associated with filter list num-
ber one. Note that this example uses a
Set Privileged
command before the Set
Switch Filter command. The Set Switch Filter command requires privileged sta-
tus; if privileged status is currently enabled, the Set Privileged command will not
be necessary.
After a filter list is associated with a port, the filterÕs configuration must be spec-
ified using
Set/Define Filter commands. These commands specify the following
information: the filter list number, where the new filter will be placed in the filter
list, the packet type to be filtered, and whether to forward or discard the speci-
fied type of packet. A complete explanation of the Set/Define Filter options is
given beginning on page 6-4.
The example below displays a sample filter list configuration [Figure 6-2].
Figure 6-2: Filter List Configuration Example
Local_1> SET PRIVILEGED
Password> SYSTEM (not echoed)
Local_1> SET SWITCH ETHERNET 2 FILTER 1
Local> SET PRIVILEGED
Password> SYSTEM (not echoed)
Local>> SET FILTER 2 APPEND MULTICAST DENY
Local>> SET FILTER 2 APPEND PROTOCOL IP UDP SMTP ALLOW
Local>> SET FILTER 2 APPEND PROTOCOL APPLETALK PAP ALLOW
Local>> SET FILTER 2 APPEND PROTOCOL IP DENY
If None is specified
instead of a filter
number, no filter
list will be consult-
ed. This will ensure
the fastest packet
forwarding.