Draytek VigorAccess User's Installation Manual page 51

VigorAccess User Installation Guide
3.4 Packet Filtering
This function is provided for users to setup some rules to filter the specific packets
while receiving packets from logical ports.
IP DSLAM supports for rule-based packet filtering, it can be used to implement
filtering required of NetBeui, NetBIOS, DHCP, 802.1x and other protocols.
3.4.1 Filtering Modes
IP DSLAM supports for independent rule ordering and rule ID. It means that rule ID
no longer determines the order in which the rule is applied. The rule can be modified
easily; users can replace a rule sequence of a stage on an interface by another
sequence in one step.
Moreover, IP DSLAM also supports for capturing unicast and multicast packets that
fail lookup in the forwarding database is provided. Users may write their own
applications to terminate and act on this information. On the other side, it also
supports for capturing packets coming to Control Plane that do not match any
registered filter.
3.4.2 Classifier Tree
IP DSLAM provides tree architecture for classification. This tree is now configurable
as a generic filter sub-rule.
3.4.3 Multiple Filter Stages
IP DSLAM supports a concept of multiple filter stages are provided for ingress and
egress filter rules. Moreover, IP DSLAM supports an Egress filtering for unicast,
broadcast and multicast traffic. It also supports multiple actions configurations by per
filter rule.
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