3. DSL Card Configuration
8000-A2-GB26-50 April 2001 3-37
Ethertype Filters (Ethertype Filter Table) (A-G-B)
The Ethertype Filter Table screen displays the following information:
Item – Enter a value from 1–8 to add, delete, or modify individual filter entries.
Filter Name – Name of the Ethertype filter. (This field is read- only.)
Rules – Number of rules in the Ethertype filter (0–33). (This field is read-only.)
Def. Filter Action – Forward/Discard. Default filter action. (This field is read-only.)
Interface – DSL interface to which the filter belongs (for example, dsl1:1 through dsl12:1
for 12-port cards). (This field is read-only.)
Filter Status – Active/Inactive. (Default = Inactive). (This field is read-only.)
Direction – Inbound/Outbound. (This field is read-only.)
On the bottom of this screen at the
Item Number (0 to Add, Item# to Edit, -Item# to Delete) prompt:
Select 0 (zero) to add a new filter.
Select # (
n
) to edit existing filters. Example: Enter 3 to add Filter #3.
Select –# (–
n
) to delete a filter. Example: Enter –6 to delete Filter #6.
The Add or Edit selection takes you to the Ethertype FIlter Configuration screen. When
you exit that screen, you return to the Ethertype Filter screen.
NOTE: Deleting the filter deletes all the rules associated with that filter.
Ethertype Filter (Ethertype Filter Configuration screen) (A-G-B)
Allows you to build multiple rules for an Ethertype filter. A filter consists of a set of rules
applied to a specific interface to indicate whether a packet received or sent out of that
interface is forwarded or discarded. You can add, edit, or delete filter rules within a named
set.
A filter works by successively applying the rules to the information obtained from the
packet header until a match is found. The filter then performs the action specified by the
rule on that packet, which forwards or discards the packet. If all the rules are searched
and no match is found, the configured default filter action is executed.
Rules are applied in the order in which they are configured. You can have up to 16 rules
per filter. Each rule reduces packet throughput of the DSL card.
There can be 24 filters per DSL card with a maximum of two filters per DSL port, one
inbound filter and one outbound filter. The same filter can be applied as an inbound filter
and an outbound filter. Filters are configured on the port card and the processing takes
place on the endpoint.
NOTE: Once your rules have been configured, you ca n then bi nd and ac tiv ate the filte r
on the DSL interface using the
Configuration
→
Interfaces
→
General
screen (A-C-A).
Table 3-6. Filters Options (3 of 3)