Alcatel-Lucent 6850-48 ネットワークガイド

Learned Port Security Overview

Configuring Learned Port Security

page 3-6

OmniSwitch AOS Release 6 Network Configuration Guide

It is also possible to statically configure authorized source MAC address entries into the LPS table. This 
type of entry behaves the same way as dynamically configured entries in that it authorizes port access to 
traffic that contains a matching source MAC address.

Static source MAC address entries, however, take precedence over dynamically learned entries. For exam-
ple, if there are 2 static MAC address entries configured for port 2/1 and the maximum number allowed on 
port 2/1 is 10, then only 8 dynamically learned MAC addresses are allowed on this port.

Note that source learning of configured authorized MAC addresses is still allowed after the LPS time limit 
has expired. However, all learning is stopped if the number of MAC addresses learned meets or exceeds 
the maximum number of addresses allowed, even if the LPS time limit has not expired.

There are two ways to define a static source MAC address entry in the LPS table; specify an individual 
MAC address or a range of MAC addresses. See 

 for more information. 

Note. Statically configured authorized MAC addresses are displayed permanently in the MAC address 
table for the specified LPS port; they will not be learned on any other port in the same VLAN.

The LPS database table is separate from the source learning MAC address table. However, when a MAC is 
authorized for learning on an LPS port, an entry is made in the MAC address table in the same manner as 
if it was learned on a non-LPS port (see 

 for more information).

In addition to dynamic and configured source MAC address entries, the LPS table also provides the 
following information for each eligible LPS port:

• The LPS status for the port; enabled or disabled.

• The maximum number of MAC addresses allowed on the port.

• The maximum number of MAC addresses that can be filtered on the port.

• The violation mode selected for the port; restrict or shutdown.

• Statically configured MAC addresses and MAC address ranges.

• All MAC addresses learned on the port.

• The management status for the MAC address entry; configured or dynamic.

If the LPS port is shut down or the network device is disconnected from the port, the LPS table entries and 
the source learning MAC address table entries for the port are automatically cleared. In addition, if an LPS 
table entry is intentionally cleared from the table, the MAC address for this entry is automatically cleared 
from the source learning table at the same time. To override this behavior, a dynamic MAC address can be 
converted to a static MAC address using the 

 command.

To view the contents of the LPS table, use the 

 command. Refer to the OmniSwitch 

CLI Reference Guide for more information about this command.