Specifications

Elastic Networks 1 BitStorm 1900 Access Multiplexer
08-01101-01, Rev. 1.50 BitStorm 1900™ Installation and Maintenance Guide 1-7
they are from one of the MAC addresses in the filter table and upstream
packets are discarded unless they are going to one of the MAC
addresses in the filter table. Thus, it is impossible for a user connected
to one CPE modem to see another user on the same local L2 network
connected to another CPE modem, unless the user’s computer’s MAC
address is entered into the Privacy Management filter table.
NOTE: Creating a filter table on a 4212/6224/10224 CO modem affects
all EtherLoop ports on that card and one of its CPEs is redun-
dant, but possible. However, the CO table should be the same
or be a superset of the CPE table.
Same Card Broadcast
The Same Card Broadcast feature is an option on CO modems that
should be used in conjunction with Privacy Management to provide
secure communications (default is Disabled):
Refer to Table 1-2, “Same Card Broadcast Feature Enabled/Disabled
Function for CO Modems,” for the feature function and security issue-
sassociated with each setting..
Table 1-2: Same Card Broadcast Feature Enabled/Disabled Function for CO Modems
CO
Modem
Enabled/
Disabled
Feature Function Security
4212
Enabled
Allows the 12 clients on the same card to commu-
nicate with each other without going out into the
network first.
N/A
Disabled
Blocks clients on the same card from seeing and
communicating with each other, unless the traffic
exits the DSLAM and returns from the network.
Clients on other cards can
see each other unless Pri-
vacy Management is used.
6306
Enabled
(Default)
Allows clients on circuits 1, 2, 3 or circuits 4, 5, 6 to
communicate with each other without going out into
the network first.
N/A
Disabled
Blocks clients on the same group-of-three from
seeing and communicating with each other, unless
the traffic exits the DSLAM and returns from the
network.
Clients on other groups-of-
three or other cards can see
each other unless Privacy
Management is used.