ZyXEL Communications IES-1000 - ANNEXE 7, Руководство пользователя, Страница: 95 / 139

NetAtlas IES-1000 (AAM1008) EMS User’s Guide
The Configuration Menus 7-37
broadcasts to a smaller and more manageable logical broadcast domain. In traditional switched environments, all
broadcast frames go to each and every individual port.
The stations on a logical network belong to one group; however, a station can belong to more than one group.
Subscribers of one group are not allowed to access the resources of other groups and a higher level of security is
achieved. This isolates the subscribers from one another and prevents a subscriber from discovering the resources,
for example, shared drives or printers, of another subscriber.
In the IES-1000 port filter, the allowable outgoing port(s) of each incoming port must be defined. Ethernet frames
are forwarded according to these rules. Therefore, if you wish to allow two subscriber ports to talk to each other,
for example, between conference rooms in a hotel, you must define the egress port (outgoing port) for both ports.
An egress port is an outgoing port, that is, a port through which a data frame leaves. Port filters are specific only
to the switch on which they were created.
The factory default settings for the port-based filter of the IES-1000 are:
- Bridge port 1 (Ethernet port) allowed to all bridge ports
- Bridge port 2 (DSL port 1) allowed to bridge port 1 (Ethernet port) only
- Bridge port 3 (DSL port 2) allowed to bridge port 1 (Ethernet port) only
- Bridge port 4 (DSL port 3) allowed to bridge port 1 (Ethernet port) only
- Bridge port 5 (DSL port 4) allowed to bridge port 1 (Ethernet port) only
- Bridge port 6 (DSL port 5) allowed to bridge port 1 (Ethernet port) only
- Bridge port 7 (DSL port 6) allowed to bridge port 1 (Ethernet port) only
- Bridge port 8 (DSL port 7) allowed to bridge port 1 (Ethernet port) only
- Bridge port 9 (DSL port 8) allowed to bridge port 1 (Ethernet port) only
The default port filter settings allow each DSL port to communicate back and forth with only the Ethernet port,
and not with other DSL ports. The following figure illustrates this.
Figure 7-31 Default Port Filter Settings
7.8.1 The Port Filtering Screen
View the current port filter configuration in the Port Filtering screen. Click Configuration and Port Filter.