User`s guide

Filters
5-5
to filter (ON) or not filter (OFF) packets from the specified address.
With the address table entry shown in Table 5-1, you could use any
of the three types of address table filtering which are described in
the sections that follow:
• Destination address filter
• Source address filter
• Source address multicast filter
5.4.1 Destination Address Filter
A destination address filter may be used to discard all traffic
destined to a specific MAC address. This type of filter is configured
by setting a static address entry for the MAC address and
specifying
{null} as the port assignment as shown in Table 5-2. The
port assigned by the static entry will take precedence over the port
learned by the ATX's learning algorithm.
The effect of this filter is that packets to the specified address will
not be forwarded to any port.
5.4.2 Source Address Filter
The source address filtering capability uses the source filter flag,
which is a component of each entry in the address table. When the
flag is set to ON, all packets originating from the designated MAC
address will be filtered.
Table 5-2. Representation Of A Destination Address Filter
MAC address
Port
(segment)
Age
Source
filter
Multicast
source
filter
00:01:02:03:04:05 {null} 26 OFF OFF