Installation guide

Command Line Interface
4-144
4
Command Usage
• If you enable port security, the switch stops learning new MAC addresses on
the specified port when it has reached a configured maximum number. Only
incoming traffic with source addresses already stored in the dynamic or static
address table will be accepted.
•Use the port security command to enable security on a port. Then use the
port security action command to set the response to a port security violation,
and the port security max-mac-count command to set the maximum
number of addresses allowed on a port.
• You can also manually add secure addresses with the mac-address-table
static command.
• A secure port has the following restrictions:
- Cannot be connected to a network interconnection device.
- Cannot be a trunk port.
• If a port is disabled due to a security violation, it must be manually re-enabled
using the no shutdown command.
Example
The following example enables port security for port 5, and sets the response to a
security violation to issue a trap message:
Related Commands
shutdown (4-189)
mac-address-table static (4-214)
show mac-address-table (4-216)
Network Access (MAC Address Authentication)
Network Access authentication controls access to the network by authenticating the
MAC address of each host that attempts to connect to a switch port. Traffic received
from a specific MAC address is forwarded by the switch only if the source MAC
address is successfully authenticated by a central RADIUS server. While
authentication for a MAC address is in progress, all traffic is blocked until
authentication is completed. Once successfully authenticated, the RADIUS server
may optionally assign VLAN settings for the switch port.
Console(config)#interface ethernet 1/5
Console(config-if)#port security
Console(config-if)#port security action trap
Console(config-if)#
Table 4-43 Network Access
Command Function Mode Page
network-access aging Enables MAC address aging GC 4-145
network-access mode Enables MAC authentication on an interface IC 4-146
network-access
max-mac-count
Sets a maximum for authenticated MAC addresses on an
interface
IC 4-147