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C
HAPTER
30
| General Security Measures
Port Security
◆
The mac-learning commands cannot be used if 802.1X Port
Authentication has been globally enabled on the switch with the
dot1x
system-auth-control
command, or if MAC Address Security has been
enabled by the
port security
command on the same interface.
E
XAMPLE
The following example disables MAC address learning for port 2.
Console(config)#interface ethernet 1/2
Console(config-if)#no mac-learning
Console(config-if)#
R
ELATED
C
OMMANDS
show interfaces status (834)
port security
This command enables or configures port security. Use the
no
form without
any keywords to disable port security. Use the
no
form with the
appropriate keyword to restore the default settings for a response to
security violation or for the maximum number of allowed addresses.
S
YNTAX
port security
[
action
{
shutdown
|
trap
|
trap-and-shutdown
}
|
max-mac-count
address-count
]
no port security
[
action
|
max-mac-count
]
action
- Response to take when port security is violated.
shutdown
- Disable port only.
trap
- Issue SNMP trap message only.
trap-and-shutdown
- Issue SNMP trap message and disable
port.
max-mac-count
address-count
- The maximum number of MAC addresses that
can be learned on a port. (Range: 0 - 1024, where 0 means
disabled)
D
EFAULT
S
ETTING
Status: Disabled
Action: None
Maximum Addresses: 0
C
OMMAND
M
ODE
Interface Configuration (Ethernet)
C
OMMAND
U
SAGE
◆
When port security is enabled with this command, the switch first clears
all dynamically learned entries from the address table. It then starts
learning new MAC addresses on the specified port, and stops learning
Summary of Contents for LGB6026A
Page 6: ...ABOUT THIS GUIDE 4...
Page 40: ...38 CONTENTS...
Page 60: ...58 SECTION I Getting Started...
Page 86: ...84 SECTION II Web Configuration Unicast Routing on page 517 Multicast Routing on page 575...
Page 162: ...160 CHAPTER 5 Interface Configuration VLAN Trunking...
Page 196: ...194 CHAPTER 6 VLAN Configuration Configuring MAC based VLANs...
Page 204: ...CHAPTER 7 Address Table Settings Clearing the Dynamic Address Table 202...
Page 238: ...CHAPTER 11 Class of Service Layer 2 Queue Settings 236...
Page 254: ...252 CHAPTER 12 Quality of Service Attaching a Policy Map to a Port...
Page 448: ...446 CHAPTER 16 Multicast Filtering Multicast VLAN Registration...
Page 470: ...468 CHAPTER 17 IP Configuration Setting the Switch s IP Address IP Version 6...
Page 576: ...574 CHAPTER 21 Unicast Routing Configuring the Open Shortest Path First Protocol Version 2...
Page 606: ...604 CHAPTER 22 Multicast Routing Configuring PIMv6 for IPv6...
Page 620: ...618 CHAPTER 23 Using the Command Line Interface CLI Command Groups...
Page 672: ...670 CHAPTER 25 System Management Commands Time Range...
Page 692: ...690 CHAPTER 26 SNMP Commands...
Page 700: ...698 CHAPTER 27 Remote Monitoring Commands...
Page 854: ...CHAPTER 34 Port Mirroring Commands Local Port Mirroring Commands 852...
Page 862: ...860 CHAPTER 36 Address Table Commands...
Page 958: ...956 CHAPTER 40 Quality of Service Commands...
Page 1034: ...1032 CHAPTER 42 LLDP Commands...
Page 1044: ...1042 CHAPTER 43 Domain Name Service Commands...
Page 1062: ...1060 CHAPTER 44 DHCP Commands DHCP Server...
Page 1206: ...CHAPTER 47 IP Routing Commands Open Shortest Path First OSPFv3 1204...
Page 1250: ...1248 SECTION IV Appendices...
Page 1256: ...1254 APPENDIX A Software Specifications Management Information Bases...
Page 1278: ...1276 COMMAND LIST...