HP J3128A AdvanceStack 10Base-T Hub-8E, Manual

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Configuration Reference
Con
figuration Refe
ren
c
e
Understanding Address Selections Methods
The technique used to control which devices are permitted to communicate
with a port is known as
Address Selection
. Address Selection is the process
by which the port sets policy for receiving packets. The port performs this
task by comparing addresses in the source header of a packet with preset
address tables that compile lists of acceptable source addresses. The address
tables can be very restrictive in allowing for packet reception or less restric-
tive. Address tables are determined by the Address Selection method you set
for the port. The three address selection methods are:
Continuous. The hub learns the address of the device attached to the
port and makes it the authorized address. If a different device is later
attached to the port, the new address is learned and becomes the autho-
rized address.
First Heard.
The hub learns the address of the device attached to the
port and makes it the authorized address. If a different device is later
attached to the port, the new address is registered as an intruder address.
This indicates a security violation has occurred and the port is automati-
cally disabled.
Assigned. You enter the address of the device that is authorized to be
attached to the port. If a different device is later attached to the port, the
new address is registered as an intruder address. This indicates that a
security violation has occurred and the port is disabled. If you choose
Assigned, you need to go to the Authorized Address box and type in a
specific MAC address of a device authorized to be attached to that port.
Agent.bk : AGTCH6.FM5 Page 72 Thursday, February 19, 1998 2:13 PM