User`s guide

Filters
5-7
designated MAC address will be filtered. Multicast packets are
those destined for more than one address (using a multicast
destination address). This is useful for preventing broadcast traffic
from a particular station.
Because the multicast source filter flag is set to ON, this filter will
discard any multicast packets from the specified MAC address.
5.5 COMBINATION PORT FILTERS
In contrast to address table filters, which apply to traffic to or from
a particular MAC address, combination port filters apply to traffic
to or from a specific port segment. They also provide greater
filtering flexibility.
Combination port filters include multiple filtering conditions. This
makes it possible to configure very specific filters. For example, a
combination port filter could be structured to filter all AppleTalk
packets from port segment 2 whose destination address is xyz. In
this example, three filtering conditions are specified. The filter
could be logically represented as:
• Filter packets if they are from port 2
• And if they are AppleTalk packets
• And if the destination address is xyz
The various types of filtering conditions that may be specified are
referred to as fields. Two examples of fields are entry or exit port
and Ethernet protocol type. The available fields for combination
Table 5-5. Representation Of A Source Address Multicast Filter
MAC address
Port
(segment)
Age
Source
filter
Multicast
source
filter
00:01:02:03:04:05 2 12 OFF ON