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Hub Security 4-31
■
Disable on Intrusion — Compares the source
address of all frames received on the port to the
authorized addresses for that port. If the source
address of the incoming frame does not match
the authorized addresses for this port, the port is
disabled to prevent communication. This option
is only valid when
Full Security
has been selected.
Need To Know Allows you to configure which
frames are forwarded to the selected port. If the
port does not support configurable Need To Know,
these options are grayed out:
■
Disabled — All frames are forwarded.
■
Enabled — The port examines the destination
address of the frame. If it matches an authorized
address for the port it is forwarded. If it does not,
it is scrambled, so it can’t be read.
■
Allow Broadcasts — In addition to Enabled,
allows broadcast frames to be transmitted to the
port.
■
Allow Broadcasts and Multicasts — In addition to
Enabled, allows broadcast and multicast frames
to be transmitted to the port.
When you click on OK, the operation may fail for one
of the following reasons:
■
The operation has timed out.
■
An Invalid MAC address (in other words,
Multicast or Broadcast address) has been
entered into the list of authorized addresses.
■
There is a duplicate address on another port.
If the address is on another port already and DUD is
set to Full Security or Autolearn, you must remove the
address from the other port before it can be assigned
to the current port.
Configuring Security at Hub Level
To configure security for a hub:
1 Do one of the following:
■
Double-click on the graphical representation of
the hub (but not on a port).
■
From the Configure menu, select General Info ...
2 In the General Info dialog box, choose the
Security
category.
16710.bk : MANAGING.FRM Page 31 Tuesday, October 7, 1997 11:38 AM