Ericsson EFN324, User Manual, Page: 36 / 176

IndexIndex
When a connection is found, the EFN checks whether a filter is associated
with the connection. If so, the packet header content is checked against
the related global_filter resources and the actions according to the chosen
filter_profile are taken. Up to 8 filter_profiles can be defined.
Each filter_profile has 8 attributes, named global_filter_1 to global_filter_8.
global_filter_1 refers the action to be taken based on the result of the
global_filter object, global_filter 1. Global filter objects do not have an
underscore between global_filter and their index number. Similarly,
global_filter_2 refers to the action to be taken based on the result of
global_filter 2, and so on.
Matching starts with global_filter_1. If the matching is positive, that is, the
packet header content is consistent with global_filter 1, then the measures
specified at global_filter_1 are taken. When matching gives a positive
result, the other global filters are skipped. If the match is negative,
matching will continue with global_filter 2.
If matching with global_filter_N is negative, then matching with
global_f1 is done, and so on, until either a positive match is made
or all 8 global_filter have been tested. In the latter case, the actions
defined for global_filter_none are performed.
The possible filtering outcomes are the following:

The destination address is changed.

The packet is discarded.

The packet is forwarded directly to an egress port or a switching domain.

The packet is allowed through for further processing, according to the
normal procedure.
10. Quality of Service
Quality of Service functions are performed as described in section 5.5.1 on
page 42.
5.3 Switching Domain
When a packet arrives at the switching domain, the main issue is to decide
where to send the packet. Specifically, to which egress connection, or
connections, is the packet forwarded?