3Com OFFICECONNECT ETHERNET HUB 8, User Manual

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MAC Address — Allows you to enter the MAC
address for a device to be authorized to transmit
through this port. When you have typed the
MAC address, click on <Add . Use the format
xx-xx-xx-xx-xx-xx for the MAC address.
■
<Add — Adds the MAC address to the
Authorized addresses list.
■
Remove — Removes the selected address or
addresses from the Authorized Address list.
DUD (Disconnect Unknown Device) Allows you to
configure the learning and security mode of the port:
■
No Restriction — Disables all security and
learning features.
■
Continually Learn — The port learns the MAC
addresses of the devices transmitting to this
port and stores them in its address table. The
maximum number of addresses learned by the
ports is determined by the value shown in the
No. of Addresses field. When the table is full, the
port continues to learn new addresses,
overwriting the addresses it learned previously.
The port never automatically switches to full
security (for example Auto Learn), you have to do
this manually. While learning, packets received
on a port are not repeated out of the other ports.
■
Auto Learn — The port learns the MAC
addresses of the devices transmitting to this
port and stores them permanently in its address
table. The maximum number of addresses
learned by the ports is determined by the value
shown in the No. of Addresses field. When the
table is full, the port automatically switches to
Full Security mode and no other address are
allowed to connect to this port. While learning,
packets received on a port are not repeated out
of the other ports.
■
Full Security — Learning is disabled and only the
addresses entered as authorized addresses for
this port are allowed to transmit. If an
unauthorized address is detected, a trap will be
sent (if traps are configured) to an IP/IPX-based
management station, and the port is disabled
(if Disable on Intrusion is selected).
16710.bk : MANAGING.FRM Page 30 Tuesday, October 7, 1997 11:38 AM