ZyXEL Communications XS3800-28, Руководство пользователя, Страница: 660 / 789

Chapter 86 Port Security
XS3800-28 User’s Guide
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86.4 VLAN MAC Address Limit
Use this screen to set the MAC address learning limit on per-port and per-VLAN basis. Click SECURITY >
Port Security > VLAN MAC Address Limit to display the screen as shown.
Figure 523 SECURITY > Port Security > VLAN MAC Address Limit
The following table describes the labels in this screen.
* Settings in this row apply to all ports.
Use this row only if you want to make some of the settings the same for all ports. Use this row first
to set the common settings and then make adjustments on a port-by-port basis.
Note: Changes in this row are copied to all the ports as soon as you make them.
Active Select this check box to enable the port security feature on this port. The Switch forwards
packets whose MAC addresses is in the MAC address table on this port. Packets with no
matching MAC addresses are dropped.
Clear this check box to disable the port security feature. The Switch forwards all packets on this
port.
Address
Learning
MAC address learning reduces outgoing broadcast traffic. For MAC address learning to occur
on a port, the port itself must be active with address learning enabled.
Limited
Number of
Learned MAC
Address
Use this field to limit the number of (dynamic) MAC addresses that may be learned on a port.
For example, if you set this field to "5" on port 2, then only the devices with these five learned
MAC addresses may access port 2 at any one time. A sixth device must wait until one of the
five learned MAC addresses ages out. MAC address aging out time can be set in the
SYSTEM >
Switch Setup screen. The valid range is from “0” to “32K”. “0” means this feature is disabled.
Apply Click Apply to save your changes to the Switch’s run-time memory. The Switch loses these
changes if it is turned off or loses power, so use the Save link on the top navigation panel to
save your changes to the non-volatile memory when you are done configuring.
Cancel Click Cancel to begin configuring this screen afresh.
Table 353 SECURITY > Port Security (continued)
LABEL DESCRIPTION
Table 354 SECURITY > Port Security > VLAN MAC Address Limit
LABEL DESCRIPTION
Index This field displays the index number of the rule.
Active This field displays whether the rule is activated or not.
Port This field displays the number of the port to which this rule is applied.
VID This is the VLAN ID number to which the port belongs.
Limit Number This is the maximum number of MAC addresses which a port can learn in a VLAN.
Select an entry’s check box to select a specific entry. Otherwise, select the check box in the
table heading row to select all entries.