D-Link DGS-3000 series User manual

DGS-3000 Series Layer 2 Managed Gigabit Ethernet Switch CLI Reference Guide
i
Table of Contents
Chapter 1 Using Command Line Interface.............................................................................................1
Chapter 2 Basic Command List .............................................................................................................8
Chapter 3 802.1Q VLAN Command List..............................................................................................23
Chapter 4 802.1X Command List.........................................................................................................39
Chapter 5 Access Authentication Control Command List....................................................................58
Chapter 6 Access Control List (ACL) Command List...........................................................................87
Chapter 7 Address Resolution Protocol (ARP) Command List..........................................................107
Chapter 8 ARP Spoofing Prevention Command List.........................................................................112
Chapter 9 Auto-Configuration Command List....................................................................................114
Chapter 10 Basic Commands Command List......................................................................................117
Chapter 11 BPDU Attack Protection Command List............................................................................134
Chapter 12 Cable Diagnostics Command List.....................................................................................139
Chapter 13 Command Logging Command List....................................................................................141
Chapter 14 Compound Authentication Command List ........................................................................143
Chapter 15 Configuration Command List.............................................................................................154
Chapter 16 Connectivity Fault Management (CFM) Command List....................................................159
Chapter 17 CPU Interface Filtering Command List .............................................................................189
Chapter 18 Debug Software Command List........................................................................................198
Chapter 19 DHCP Local Relay Command List....................................................................................210
Chapter 20 DHCP Relay Command List..............................................................................................218
Chapter 21 DHCP Server Command List............................................................................................243
Chapter 22 DHCP Server Screening Command List...........................................................................273
Chapter 23 DHCPv6 Relay Command List..........................................................................................285
Chapter 24 DHCPv6 Server Command List ........................................................................................297
Chapter 25 Digital Diagnostic Monitoring (DDM) Command List.........................................................311
Chapter 26 D-Link Unidirectional Link Detection (DULD) Command List ...........................................318
Chapter 27 Domain Name System (DNS) Resolver Command List....................................................320
Chapter 28 DoS Attack Prevention Command List..............................................................................327
Chapter 29 Energy Efficient Ethernet (EEE) Command List ...............................................................331
Chapter 30 Ethernet Ring Protection Switching (ERPS) Command List.............................................333
Chapter 31 External Alarm Command List ..........................................................................................345
Chapter 32 Filter Command List..........................................................................................................347
Chapter 33 Filter Database (FDB) Command List...............................................................................350
Chapter 34 Flash File System (FFS) Command List...........................................................................360
Chapter 35 FTP Client Command List.................................................................................................369
Chapter 36 Gratuitous ARP Command List.........................................................................................377
Chapter 37 Historical Counter Command List .....................................................................................383
Chapter 38 IGMP Snooping Command List.........................................................................................388
Chapter 39 IP-MAC-Port Binding (IMPB) Command List ....................................................................415
Chapter 40 IPv6 Neighbor Discover Command List............................................................................439
Chapter 41 IPv6 Route Command List ................................................................................................443

DGS-3000 Series Layer 2 Managed Gigabit Ethernet Switch CLI Reference Guide
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Chapter 42 Japanese Web-Based Access Control (JWAC) Command List .......................................446
Chapter 43 Jumbo Frame Command List............................................................................................472
Chapter 44 Layer 2 Protocol Tunneling (L2PT) Command List...........................................................474
Chapter 45 Link Aggregation Command List.......................................................................................478
Chapter 46 Link Layer Discovery Protocol (LLDP) Command List......................................................485
Chapter 47 Loop Back Detection (LBD) Command List ......................................................................511
Chapter 48 MAC Notification Command List .......................................................................................517
Chapter 49 MAC-based Access Control Command List......................................................................522
Chapter 50 MAC-based VLAN Command List.....................................................................................539
Chapter 51 Mirror Command List.........................................................................................................542
Chapter 52 MLD Snooping Command List..........................................................................................545
Chapter 53 MSTP debug enhancement Command List......................................................................568
Chapter 54 Multicast Filter Command List...........................................................................................574
Chapter 55 Multicast VLAN Command List .........................................................................................587
Chapter 56 Multiple Spanning Tree Protocol (MSTP) Command List.................................................608
Chapter 57 ND Spoofing Prevention Command List ...........................................................................621
Chapter 58 Network Load Balancing (NLB) Command List ................................................................623
Chapter 59 Network Monitoring Command List...................................................................................628
Chapter 60 OAM Command List..........................................................................................................634
Chapter 61 Password Recovery Command List..................................................................................641
Chapter 62 Peripherals Command List................................................................................................643
Chapter 63 Ping Command List...........................................................................................................646
Chapter 64 Port Security Command List .............................................................................................649
Chapter 65 Power Saving Command List............................................................................................657
Chapter 66 PPPoE Circuit ID Insertions Command List......................................................................664
Chapter 67 Protocol VLAN Command List ..........................................................................................668
Chapter 68 QinQ Command List..........................................................................................................674
Chapter 69 Quality of Service (QoS) Command List...........................................................................682
Chapter 70 RADIUS Client Command List ..........................................................................................701
Chapter 71 Remote Copy Protocol (RCP) Command List...................................................................707
Chapter 72 RSPAN Command List......................................................................................................716
Chapter 73 Safeguard Engine Command List.....................................................................................722
Chapter 74 Secure Shell (SSH) Command List...................................................................................724
Chapter 75 Secure Sockets Layer (SSL) Command List ....................................................................733
Chapter 76 Show Technical Support Command List...........................................................................739
Chapter 77 Simple Mail Transfer Protocol (SMTP) Command List .....................................................742
Chapter 78 Simple Network Management Protocol (SNMP) Command List ......................................748
Chapter 79 Simple RED Command List ..............................................................................................776
Chapter 80 Single IP Management Command List .............................................................................781
Chapter 81 Super VLAN Command List..............................................................................................792
Chapter 82 Syslog and Trap Source-interface Command List............................................................798
Chapter 83 System Log Command List...............................................................................................802
Chapter 84 System Severity Command List........................................................................................814

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Chapter 85 Telnet Client Command List..............................................................................................816
Chapter 86 TFTP Client Command List...............................................................................................817
Chapter 87 Time and SNTP Command List ........................................................................................824
Chapter 88 Trace Route Command List ..............................................................................................832
Chapter 89 Traffic Control Command List ...........................................................................................835
Chapter 90 Traffic Segmentation Command List.................................................................................840
Chapter 91 Trusted Host Command List .............................................................................................842
Chapter 92 Unicast Routing Command List.........................................................................................846
Chapter 93 VLAN Trunking Command List..........................................................................................849
Chapter 94 Voice VLAN Command List...............................................................................................854
Chapter 95 Web-based Access Control (WAC) Command List ..........................................................865
Appendix A Password Recovery Procedure.........................................................................................881
Appendix B System Log Entries...........................................................................................................883
Appendix C Trap Log Entries................................................................................................................895
Appendix D RADIUS Attributes Assignment.........................................................................................903

DGS-3000 Series Layer 2 Managed Gigabit Ethernet Switch CLI Reference Guide
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Chapter 1 Using Command Line
Interface
The Switch can be managed through the Switch’s serial port, Telnet, SNMP or the Web-based
management agent. The Command Line Interface (CLI) can be used to configure and manage the
Switch via the serial port or Telnet interfaces.
This manual provides a reference for all of the commands contained in the CLI. Every command
will be introduced in terms of purpose, format, description, parameters, and examples.
Configuration and management of the Switch via the Web-based management agent are
discussed in the Web UI Reference Guide. For detailed information on installing hardware please
also refer to the Hardware Installation Guide.
Accessing the Switch via the Serial Port1-1
The Switch’s serial port’s default settings are as follows:
•115200 baud
•no parity
•8 data bits
•1 stop bit
A computer running a terminal emulation program capable of emulating a VT-100 terminal and a
serial port configured as above are then connected to the Switch’s Console port via an included
RS-232 to RJ-45 convertor cable.
With the serial port properly connected to a management computer, the following screen should be
visible. If this screen does not appear, try pressing Ctrl+r to refresh the console screen.
DGS-3000-26TC Gigabit Ethernet Switch
Command Line Interface
Firmware: Build 1.10.0012
Copyright(C) 2014 D-Link Corporation. All rights reserved.
UserName:
PassWord:
DGS-3000-26TC:admin#
There is no initial username or password. Just press the Enter key twice to display the CLI input
cursor −DGS-3000-26TC:admin#. This is the command line where all commands are input.
Setting the Switch’s IP Address1-2
Each Switch must be assigned its own IP Address, which is used for communication with an
SNMP network manager or other TCP/IP application (for example BOOTP, TFTP). The Switch’s
default IP address is 10.90.90.90. You can change the default Switch IP address to meet the
specification of your networking address scheme.
The Switch is also assigned a unique MAC address by the factory. This MAC address cannot be
changed, and can be found on the initial boot console screen – shown below.

DGS-3000 Series Layer 2 Managed Gigabit Ethernet Switch CLI Reference Guide
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Boot Procedure V1.00.002
-------------------------------------------------------------------------------
Power On Self Test ........................................ 100 %
MAC Address : B0-C5-54-30-00-A0
H/W Version : A1
Please Wait, Loading V1.10.013 Runtime Image .............. 100 %
UART init ................................................. 100 %
Starting runtime image
Device Discovery .......................................... 100 %
Configuration init ........................................ 100 %
The Switch’s MAC address can also be found in the Web management program on the Switch
Information (Basic Settings) window on the Configuration menu.
The IP address for the Switch must be set before it can be managed with the Web-based manager.
The Switch IP address can be automatically set using BOOTP or DHCP protocols, in which case
the actual address assigned to the Switch must be known.
Starting at the command line prompt, enter the commands config ipif System ipaddress
xxx.xxx.xxx.xxx/yyy.yyy.yyy.yyy. Where the x’s represent the IP address to be assigned to the
IP interface named System and the y’s represent the corresponding subnet mask.
Alternatively, you can enter config ipif System ipaddress xxx.xxx.xxx.xxx/z. Where the x’s
represent the IP address to be assigned to the IP interface named System and the zrepresents
the corresponding number of subnets in CIDR notation.
The IP interface named System on the Switch can be assigned an IP address and subnet mask
which can then be used to connect a management station to the Switch’s Telnet or Web-based
management agent.
DGS-3000-26TC:admin#config ipif System ipaddress 10.24.22.100/255.0.0.0
Command: config ipif System ipaddress 10.24.22.100/8
Success.
DGS-3000-26TC:admin#
In the above example, the Switch was assigned an IP address of 10.24.22.100 with a subnet mask
of 255.0.0.0. The system message Success indicates that the command was executed
successfully. The Switch can now be configured and managed via Telnet, SNMP MIB browser and
the CLI or via the Web-based management agent using the above IP address to connect to the
Switch.
There are a number of helpful features included in the CLI. Entering the ?command will display a
list of all of the top-level commands.

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DGS-3000-26TC:admin# ?
Command:?
..
?
cable_diag ports
cd
cfm linktrace
cfm lock md
cfm loopback
clear
clear address_binding dhcp_snoop binding_entry ports
clear address_binding nd_snoop binding_entry ports
clear arptable
clear attack_log
clear cfm pkt_cnt
clear counters
clear ethernet_oam ports
clear fdb
clear historical_counters ports
clear igmp_snooping data_driven_group
clear igmp_snooping statistics counter
clear jwac auth_state
clear log
clear mac_based_access_control auth_state
clear mld_snooping data_driven_group
clear mld_snooping statistics counter
CTRL+C ESC qQuit SPACE nNext Page ENTER Next Entry aAll
When entering a command without its required parameters, the CLI will prompt you with a Next
possible completions: message.
DGS-3000-26TC:admin#config account
Command: config account
Next possible completions:
<username>
DGS-3000-26TC:admin#
In this case, the command config account was entered with the parameter <username>. The CLI
will then prompt to enter the <username> with the message, Next possible completions:. Every
command in the CLI has this feature, and complex commands have several layers of parameter
prompting.
In addition, after typing any given command plus one space, users can see all of the next possible
sub-commands, in sequential order, by repeatedly pressing the Tab key.
To re-enter the previous command at the command prompt, press the up arrow cursor key. The
previous command will appear at the command prompt.

DGS-3000 Series Layer 2 Managed Gigabit Ethernet Switch CLI Reference Guide
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DGS-3000-26TC:admin#config account
Command: config account
Next possible completions:
<username>
DGS-3000-26TC:admin#config account
In the above example, the command config account was entered without the required parameter
<username>, the CLI returned the Next possible completions: <username> prompt. The up
arrow cursor control key was pressed to re-enter the previous command (config account) at the
command prompt. Now the appropriate username can be entered and the config account
command re-executed.
All commands in the CLI function in this way. In addition, the syntax of the help prompts are the
same as presented in this manual −angle brackets < > indicate a numerical value or character
string, braces { } indicate optional parameters or a choice of parameters, and brackets [ ] indicate
required parameters.
If a command is entered that is unrecognized by the CLI, the top-level commands will be displayed
under the Available commands: prompt.
DGS-3000-26TC:admin#the
Available commands:
.. ? cable_diag cd
cfm clear config copy
create debug del delete
dir disable download enable
erase login logout md
move no ping ping6
rd reboot reconfig rename
reset save show smtp
telnet traceroute traceroute6 upload
DGS-3000-26TC:admin#
The top-level commands consist of commands such as show or config. Most of these commands
require one or more parameters to narrow the top-level command. This is equivalent to show what?
or config what? Where the what? is the next parameter.
For example, entering the show command with no additional parameters, the CLI will then display
all of the possible next parameters.

DGS-3000 Series Layer 2 Managed Gigabit Ethernet Switch CLI Reference Guide
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DGS-3000-26TC:admin#show
Command: show
Next possible completions:
802.1p 802.1x aaa access_profile
account accounting acct_client address_binding
arp_spoofing_prevention arpentry attack_log
auth_client auth_diagnostics auth_session_statistics
auth_statistics authen authen_enable authen_login
authen_policy authentication authorization autoconfig
bandwidth_control boot_file bpdu_protection cfm
command command_history community_encryption
config control_pkt cpu cpu_filter
current_config ddm device_status dhcp
dhcp_local_relay dhcp_relay dhcp_server dhcpv6
dhcpv6_local_relay dhcpv6_relay dhcpv6_server
dos_prevention dot1v_protocol_group dscp
duld eee environment erps
error ethernet_oam external_alarm fdb
filter flow_meter gratuitous_arp greeting_message
gvrp historical_counter
historical_utilization host_name igmp
igmp_snooping ipif ipif_ipv6_link_local_auto
iproute ipv6 ipv6route jumbo_frame
jwac l2protocol_tunnel lacp_port led
limited_multicast_addr link_aggregation lldp
lldp_med log log_save_timing
log_software_module loopdetect
mac_based_access_control mac_based_access_control_local
mac_based_vlan mac_notification max_mcast_group
mcast_filter_profile mirror mld_snooping
multicast multicast_fdb name_server
nd_spoofing_prevention nlb packet
password_recovery per_queue port port_security
port_security_entry port_vlan ports
power_saving pppoe private_vlan pvid
qinq radius rcp rmon
router_ports rspan safeguard_engine scheduling
scheduling_mechanism serial_port session
sim smtp snmp sntp
sred ssh ssl
storage_media_info stp sub_vlan
super_vlan switch syslog system_severity
tech_support terminal tftp time
time_range traffic traffic_segmentation
trap trusted_host utilization vlan
vlan_translation vlan_trunk voice_vlan wac
DGS-3000-26TC:admin#
In the above example, all of the possible next parameters for the show command are displayed. At
the next command prompt, the up arrow was used to re-enter the show command, followed by the
account parameter. The CLI then displays the user accounts configured on the Switch.

DGS-3000 Series Layer 2 Managed Gigabit Ethernet Switch CLI Reference Guide
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Command Syntax Symbols1-3
Syntax Description
angle brackets < > Encloses a variable or value. Users must specify the variable or
value.
For example, in the command create ipif <ipif_name 12>
{<network_address>} <vlan_name 32> {secondary | state
[enable | disable] | proxy_arp [enable | disable] {local [enable
| disable]}} users must supply an IP interface name for
<ipif_name 12> ,a VLAN name for <vlan_name 32>and an
address for <network_address> when entering the command.
DO NOT TYPE THE ANGLE BRACKETS.
square brackets [ ] Encloses a required value or list of required arguments. Only one
value or argument must be specified.
For example, in the command create account [admin |
operator | power_user | user] <username 15> {encrypt
[plain_text | sha_1] <password>} users must specify either the
admin-level, power-user-level or user-level account when
entering the command.
DO NOT TYPE THE SQUARE BRACKETS.
vertical bar | Separates mutually exclusive items in a list, one of which must
be entered.
For example, in the command create ipif <ipif_name 12>
{<network_address>} <vlan_name 32> {secondary | state
[enable | disable] | proxy_arp [enable | disable] {local [enable
| disable]}} users must specify either the community or trap
receiver in the command.
DO NOT TYPE THE VERTICAL BAR.
braces { } Encloses an optional value or a list of optional arguments. One or
more values or arguments can be specified.
For example, in the command reset {[config | system]}
{force_agree} users may choose to reset the configuration or the
system in the command.
DO NOT TYPE THE BRACES.
parentheses ( ) Indicates at least one or more of the values or arguments in the
preceding syntax enclosed by braces must be specified.
For example, in the command config bpdu_protection ports
[<portlist> | all] {state [enable | disable] | mode [drop | block |
shutdown]}(1) users have the option to specify to configure the
state or the mode. The (1) following the set of braces indicates at
least one argument or value within the braces must be specified.
DO NOT TYPE THE PARENTHESES.
ipif <ipif_name 12>
metric <value 1-31> 12 means the maximum length of the IP interface name. 1-31 means the legal range of the metric value.
Line Editing Keys1-4
Keys Description
Delete Delete character under cursor and shift remainder of line to left.

DGS-3000 Series Layer 2 Managed Gigabit Ethernet Switch CLI Reference Guide
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Keys Description
Backspace Delete character to left of cursor and shift remainder of line to
left.
Insert Toggle on and off. When toggled on, inserts text and shifts
previous text to right.
Left Arrow Move cursor to left.
Right Arrow Move cursor to right
Tab Help user to select appropriate token.
P Display the previous page.
n or Space Display the next page.
CTRL+C Escape from displayed pages.
ESC Escape from displayed pages.
q Escape from displayed pages.
r refresh the displayed pages
a Display the remaining pages. (The screen display will not pause
again.)
Enter Display the next line.
The screen display pauses when the show command output reaches the end of the page.
In the above example, all of the possible next parameters for the show command are displayed. At
the next command prompt, the up arrow was used to re-enter the show command, followed by the
account parameter. The CLI then displays the user accounts configured on the Switch.

DGS-3000 Series Layer 2 Managed Gigabit Ethernet Switch CLI Reference Guide
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Chapter 2 Basic Command List
show session
show serial_port
config serial_port {baud_rate [9600 | 19200 | 38400 | 115200] | auto_logout [never | 2_minutes |
5_minutes | 10_minutes | 15_minutes]}
enable clipaging
disable clipaging
login
logout
?
clear
show command_history
config command_history <value 1-40>
config greeting_message {default}
show greeting_message
config command_prompt [<string 16> | username | default]
config terminal width [default | <value 80-200>]
show terminal width
config ports [<portlist> | all] {medium_type [fiber | copper]} {speed [auto {capability_advertised
{10_half | 10_full | 100_half | 100_full | 1000_full}} | 10_half | 10_full | 100_half | 100_full |
1000_full {[master | slave]} | 10g_full ] | auto_negotiation [restart_an | remote_fault_advertised
[disable | offline | link_fault | auto_negotiation_error]] | flow_control [enable | disable] | learning
[enable | disable ] | state [enable | disable] | mdix [auto | normal | cross] | [description <desc 1-
32> | clear_description] | auto_speed_downgrade [enable | disable]}(1)
show ports {<portlist>} {[description | err_disabled | auto_negotiation | details | media_type]}
show session2-1
Description
This command is used to display a list of current users logged into the Switch.
Format
show session
Parameters
None.
Restrictions
Only administrators and Operators can issue this command.
Example
To display the session entries:

DGS-3000 Series Layer 2 Managed Gigabit Ethernet Switch CLI Reference Guide
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DGS-3000-26TC:admin#show session
Command: show session
ID Live Time From Level Name
--- ------------ --------------------------------------- ----- ---------------
0 00:01:46.360 10.90.90.10 puser puser
8 00:05:49.340 Serial Port admin admin
Total Entries: 2
CTRL+C ESC qQuit SPACE nNext Page pPrevious Page rRefresh
show serial_port2-2
Description
This command is used to display the current serial port settings.
Format
show serial_port
Parameters
None.
Restrictions
None.
Example
To display the serial port setting:
DGS-3000-26TC:admin#show serial_port
Command: show serial_port
Baud Rate : 115200
Data Bits : 8
Parity Bits : None
Stop Bits : 1
Auto-Logout : 10 mins
DGS-3000-26TC:admin#

DGS-3000 Series Layer 2 Managed Gigabit Ethernet Switch CLI Reference Guide
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config serial_port2-3
Description
This command is used to configure the serial bit rate used to communicate with the management
host and the idle connection auto logout time.
Format
config serial_port {baud_rate [9600 | 19200 | 38400 | 115200] | auto_logout [never |
2_minutes | 5_minutes | 10_minutes | 15_minutes]}
Parameters
baud_rate - (Optional) The serial bit rate that will be used to communicate with the management
host. The default baud rate is 115200.
9600 - Specify the serial bit rate to be 9600.
19200 - Specify the serial bit rate to be 19200.
38400 - Specify the serial bit rate to be 38400.
115200 - Specify the serial bit rate to be 115200.
auto_logout - (Optional) The auto logout time out setting.
never - Never timeout.
2_minutes - When idle over 2 minutes, the device will auto logout.
5_minutes - When idle over 5 minutes, the device will auto logout.
10_minutes - When idle over 10 minutes, the device will auto logout.
15_minutes - When idle over 15 minutes, the device will auto logout.
Restrictions
Only Administrators and Operators can issue this command.
Example
To configure baud rate:
DGS-3000-26TC:admin#config serial_port baud_rate 9600
Command: config serial_port baud_rate 9600
Success.
DGS-3000-26TC:admin#
enable clipaging2-4
Description
This command is used to enable the pausing of the screen display when the show command
output reaches the end of the page. The default setting is enabled.
Format
enable clipaging

DGS-3000 Series Layer 2 Managed Gigabit Ethernet Switch CLI Reference Guide
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Parameters
None.
Restrictions
Only Administrators and Operators can issue this command.
Example
To enable pausing of the screen display when show command output reaches the end of the page:
DGS-3000-26TC:admin#enable clipaging
Command: enable clipaging
Success.
DGS-3000-26TC:admin#
disable clipaging2-5
Description
This command is used to disable the pausing of the screen display when the show command
output reaches the end of the page. The default setting is enabled.
Format
disable clipaging
Parameters
None.
Restrictions
Only Administrators and Operators can issue this command.
Example
To disable pausing of the screen display when show command output reaches the end of the page:
DGS-3000-26TC:admin#disable clipaging
Command: disable clipaging
Success.
DGS-3000-26TC:admin#

DGS-3000 Series Layer 2 Managed Gigabit Ethernet Switch CLI Reference Guide
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login2-6
Description
This command is used to allow user login to the Switch.
Format
login
Parameters
None.
Restrictions
None.
Example
To login the Switch with a user name dlink:
DGS-3000-26TC:admin#login
Command: login
UserName:dlink
PassWord:****
DGS-3000-26TC:admin#
logout2-7
Description
This command is used to logout from the command prompt.
Format
logout
Parameters
None.
Restrictions
None.
Example
To logout from the current user:

DGS-3000 Series Layer 2 Managed Gigabit Ethernet Switch CLI Reference Guide
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DGS-3000-26TC:admin#logout
Command: logout
**********
* Logout *
**********
DGS-3000-26TC Gigabit Ethernet Switch
Command Line Interface
Firmware: Build 1.10.013
Copyright(C) 2014 D-Link Corporation. All rights reserved.
UserName:
?2-8
Description
This command is used to display a description of a specific command or general command.
Format
?
Parameters
None.
Restrictions
None.
Example
To get “ping” command usage, descriptions:
DGS-3000-26TC:admin#? ping
Command: ? ping
Command: ping
Usage: [<ipaddr> | <domain_name 255>] { times <value 1-255> | timeout <sec 1-
99>}
Description: Used to test the connectivity between network devices.
DGS-3000-26TC:admin#
clear2-9
Description
This command is used to clear the screen.

DGS-3000 Series Layer 2 Managed Gigabit Ethernet Switch CLI Reference Guide
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Format
clear
Parameters
None.
Restrictions
None.
Example
To clear screen:
DGS-3000-26TC:admin#clear
Command: clear
DGS-3000-26TC:admin#
show command_history2-10
Description
This command is used to display command history.
Format
show command_history
Parameters
None.
Restrictions
None.
Example
To display command history:

DGS-3000 Series Layer 2 Managed Gigabit Ethernet Switch CLI Reference Guide
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DGS-3000-26TC:admin#show command_history
Command: show command_history
? ping
login
show serial_port
show session
? config bpdu_protection ports
? reset
? create account
? create ipif
show
the
?
DGS-3000-26TC:admin#
config command_history2-11
Description
This command is used to configure the number of commands that the Switch can recall. The
Switch “remembers” upto the last 40 commands you entered.
Format
config command_history <value 1-40>
Parameters
<value 1-40> - Enter the number of commands that the Switch can recall. This value must be
between 1 and 40.
Restrictions
Only Administrators and Operators can issue this command.
Example
To configure the number of command history:
DGS-3000-26TC:admin#config command_history 25
Command: config command_history 25
Success.
DGS-3000-26TC:admin#

DGS-3000 Series Layer 2 Managed Gigabit Ethernet Switch CLI Reference Guide
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config greeting_message2-12
Description
This command is used to configure the greeting message (or banner).
Format
config greeting_message {default}
Parameters
default - (Optional) Add this parameter to the config greeting_message command will return
the greeting message (banner) to its original factory default entry.
Restrictions
Only Administrators and Operators can issue this command.
Example
To edit the banner:
DGS-3000-26TC:admin#config greeting_message
Command: config greeting_message
Greeting Messages Editor
===============================================================================
DGS-3000-26TC Gigabit Ethernet Switch
Command Line Interface
Firmware: Build 1.10.013
Copyright(C) 2014 D-Link Corporation. All rights reserved.
===============================================================================
<Function Key> <Control Key>
Ctrl+C Quit without save left/right/
Ctrl+W Save and quit up/down Move cursor
Ctrl+D Delete line
Ctrl+X Erase all setting
Ctrl+L Reload original setting
-------------------------------------------------------------------------------
show greeting_message2-13
Description
This command is used to display a greeting message.