D-Link xStack DGS-3120-24PC User manual

xStack® DGS-3120 Series Layer 2 Managed Stackable Gigabit Switch CLI Reference Guide
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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....................................................................64
Chapter 6 Access Control List (ACL) Command List...........................................................................87
Chapter 7 Access Control List (ACL) Egress Command List (EI Mode Only)...................................107
Chapter 8 Address Resolution Protocol (ARP) Command List..........................................................126
Chapter 9 ARP Spoofing Prevention Command List.........................................................................131
Chapter 10 Asymmetric VLAN Command List.....................................................................................133
Chapter 11 Auto-Configuration Command List....................................................................................135
Chapter 12 Basic Commands Command List......................................................................................137
Chapter 13 BPDU Attack Protection Command List............................................................................154
Chapter 14 Cable Diagnostics Command List.....................................................................................159
Chapter 15 Command Logging Command List....................................................................................162
Chapter 16 Compound Authentication Command List ........................................................................165
Chapter 17 Configuration Command List.............................................................................................175
Chapter 18 Configuration Trap Command List....................................................................................180
Chapter 19 Connectivity Fault Management (CFM) Command List (EI Mode Only)...........................182
Chapter 20 Connectivity Fault Management (CFM) Extension Command List (EI Mode Only)..........210
Chapter 21 CPU Interface Filtering Command List .............................................................................214
Chapter 22 Debug Software Command List........................................................................................225
Chapter 23 DHCP Local Relay Command List....................................................................................240
Chapter 24 DHCP Relay Command List..............................................................................................244
Chapter 25 DHCP Server Screening Command List...........................................................................261
Chapter 26 DHCPv6 Relay Command List (EI Mode Only) ................................................................265
Chapter 27 Digital Diagnostic Monitoring (DDM) Command List (EI Mode Only)...............................270
Chapter 28 D-Link License management System (DLMS) Command List .........................................277
Chapter 29 D-Link Unidirectional Link Detection (DULD) Command List (EI Mode Only)..................279
Chapter 30 Ethernet Ring Protection Switching (ERPS) Command List (EI Mode Only)....................281
Chapter 31 Filter Command List..........................................................................................................291
Chapter 32 Filter Database (FDB) Command List...............................................................................294
Chapter 33 Flash File System (FFS) Command List...........................................................................304
Chapter 34 Gratuitous ARP Command List.........................................................................................315

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Chapter 35 IGMP / MLD Snooping Command List..............................................................................321
Chapter 36 IP-MAC-Port Binding (IMPB) Command List (EI Mode Only)...........................................365
Chapter 37 IPv6 Neighbor Discover Command List (EI Mode Only)...................................................381
Chapter 38 IPv6 Route Command List (EI Mode Only).......................................................................385
Chapter 39 Japanese Web-Based Access Control (JWAC) Command List .......................................388
Chapter 40 Jumbo Frame Command List............................................................................................412
Chapter 41 Layer 2 Protocol Tunneling (L2PT) Command List...........................................................414
Chapter 42 Link Aggregation Command List.......................................................................................418
Chapter 43 Link Layer Discovery Protocol (LLDP) Command List......................................................425
Chapter 44 Loop Back Detection (LBD) Command List ......................................................................451
Chapter 45 MAC Notification Command List .......................................................................................457
Chapter 46 MAC-based Access Control Command List......................................................................462
Chapter 47 MAC-based VLAN Command List.....................................................................................479
Chapter 48 Mirror Command List.........................................................................................................482
Chapter 49 MSTP debug enhancement Command List......................................................................485
Chapter 50 Multicast Filter Command List...........................................................................................492
Chapter 51 Multicast VLAN Command List .........................................................................................503
Chapter 52 Multiple Spanning Tree Protocol (MSTP) Command List.................................................517
Chapter 53 Network Load Balancing (NLB) Command List ................................................................530
Chapter 54 Network Monitoring Command List...................................................................................536
Chapter 55 OAM Commands (EI Mode Only) .....................................................................................543
Chapter 56 Password Recovery Command List..................................................................................551
Chapter 57 Peripherals Command List................................................................................................554
Chapter 58 Ping Command List...........................................................................................................560
Chapter 59 Port Security Command List .............................................................................................562
Chapter 60 Power over Ethernet (PoE) Command List.......................................................................570
Chapter 61 Power Saving Command List............................................................................................575
Chapter 62 PPPoE Circuit ID Insertions Command List (EI Mode Only) ............................................581
Chapter 63 Protocol VLAN Command List ..........................................................................................585
Chapter 64 QinQ Command List (EI Mode Only) ................................................................................591
Chapter 65 Quality of Service (QoS) Command List...........................................................................599
Chapter 66 Remote Switched Port ANalyzer (RSPAN) Command List...............................................616
Chapter 67 RPC PortMapper Command List.......................................................................................622
Chapter 68 Safeguard Engine Command List.....................................................................................624
Chapter 69 SD Card Management Command List..............................................................................626
Chapter 70 Secure Shell (SSH) Command List...................................................................................633

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Chapter 71 Secure Sockets Layer (SSL) Command List ....................................................................641
Chapter 72 Surveillance VLAN Command List....................................................................................648
Chapter 73 sFlow Command List (EI Mode Only) ...............................................................................654
Chapter 74 Show Technical Support Command List...........................................................................666
Chapter 75 Simple Mail Transfer Protocol (SMTP) Command List .....................................................669
Chapter 76 Simple Network Management Protocol (SNMP) Command List ......................................674
Chapter 77 Single IP Management Command List .............................................................................703
Chapter 78 Stacking Command List ....................................................................................................713
Chapter 79 Syslog and Trap Source-interface Command List............................................................721
Chapter 80 System Log Command List...............................................................................................725
Chapter 81 System Severity Command List........................................................................................737
Chapter 82 Telnet Client Command List..............................................................................................739
Chapter 83 TFTP Client Command List...............................................................................................740
Chapter 84 Time and SNTP Command List ........................................................................................745
Chapter 85 Trace Route Command List ..............................................................................................753
Chapter 86 Traffic Control Command List ...........................................................................................756
Chapter 87 Traffic Segmentation Command List.................................................................................762
Chapter 88 Trusted Host Command List .............................................................................................764
Chapter 89 UDP Helper Command List...............................................................................................768
Chapter 90 Unicast Routing Command List.........................................................................................773
Chapter 91 VLAN Trunking Command List..........................................................................................778
Chapter 92 Voice VLAN Command List...............................................................................................783
Chapter 93 Web-Based Access Control (WAC) Command List..........................................................794
Chapter 94 Weighted Random Early Detection (WRED) Command List............................................809
Appendix A Mitigating ARP Spoofing Attacks Using Packet Content ACL ..........................................816
Appendix B Password Recovery Procedure.........................................................................................823
Appendix C System Log Entries...........................................................................................................825
Appendix D Trap Log Entries................................................................................................................838
Appendix E RADIUS Attributes Assignment.........................................................................................845

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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.
1-1 Accessing the Switch via the Serial Port
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.
DGS-3120-24TC Gigabit Ethernet Switch
Command Line Interface
Firmware: Build 2.50.015
Copyright(C) 2012 D-Link Corporation. All rights reserved.
UserName:
PassWord:
DGS-3120-24TC:admin#
There is no initial username or password. Just press the Enter key twice to display the CLI input
cursor −DGS-3120-24TC:admin# .This is the command line where all commands are input.
1-2 Setting the Switch’s IP Address
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

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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.
Boot Procedure V2.00.003
-------------------------------------------------------------------------------
Power On Self Test ........................................ 100 %
MAC Address : 00-00-00-01-02-03
H/W Version : A2
Please Wait, Loading V2.50.015 Runtime Image .............. 100 %
UART init ................................................. 100 %
Starting runtime image
Device Discovery .......................................... \
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-3120-24TC: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-3120-24TC: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.

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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.
..
?
cable_diag ports
cd
cfm linktrace
cfm lock md
cfm loopback
change drive
clear
clear address_binding dhcp_snoop binding_entry ports
clear arptable
clear attack_log
clear cfm pkt_cnt
clear counters
clear ethernet_oam ports
clear fdb
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
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-3120-24TC:admin# config account
Command: config account
Next possible completions:
<username>
DGS-3120-24TC: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.

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DGS-3120-24TC:admin# config account
Command: config account
Next possible completions:
<username>
DGS-3120-24TC: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-3120-24TC:admin#the
Available commands:
.. ? cable_diag cd
cfm change clear config
copy create debug del
delete dir disable download
enable erase execute format
install login logout md
move no ping ping6
rd reboot reconfig rename
reset save show smtp
telnet traceroute traceroute6 upload
DGS-3120-24TC: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.

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Command: show
Next possible completions:
802.1p 802.1x access_profile account
accounting acct_client address_binding
arp_spoofing_prevention arpentry asymmetric_vlan
attack_log auth_client auth_diagnostics
auth_session_statistics auth_statistics authen
authen_enable authen_login authen_policy authentication
authorization autoconfig backup bandwidth_control
boot_file bpdu_protection cfm command
command_history community_encryption config
cpu cpu_filter current_config ddm
device_status dhcp_local_relay dhcp_relay dhcpv6_relay
dlms dot1v_protocol_group dscp
duld egress_access_profile egress_flow_meter
environment erps error ethernet_oam
execute_config fdb filter flow_meter
gratuitous_arp greeting_message gvrp hol_prevention
igmp igmp_snooping ipfdb 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 nlb packet
password_recovery per_queue poe port
port_group port_security port_security_entry
port_vlan ports power_saving pppoe
private_vlan pvid qinq radius
rmon route router_ports rspan
safeguard_engine scheduling scheduling_mechanism
serial_port session sflow sim
smtp snmp sntp ssh
ssl stack_device stack_information stacking_mode
storage_media_info stp surveillance_vlan
switch syslog system_severity tech_support
terminal time time_range traffic
traffic_segmentation trap trusted_host
udp_helper utilization vlan vlan_translation
vlan_trunk voice_vlan wac wred
DGS-3120-24TC: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.

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1-3 Command Syntax Symbols
Syntax
Description
angle brackets < >
Encloses a variable or value. Users must specify the variable or value.
For example, in the syntax
config command_history <value 1-40>
users must enter how many entries for <value 1-40> 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 syntax
create account [admin | operator | power_user | user] <username 15>
{encrypt [plain_text | sha_1] <password>}
users must specify either the admin, operator, power_user or user-level
account when entering the command. DO NOT TYPE THE SQUARE
BRACKETS.
vertical bar |
Separates mutually exclusive items in a list. For example, in the syntax
reset {[config | system]} {force_agree}
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 syntax
reset {[config | system]} {force_agree}
users may choose configure or 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 syntax
config bpdu_protection ports [<portlist> | all] {state [enable | disable] |
mode [drop | block | shutdown]}(1)
users have the option to specify hops or time or both of them. 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.
1-4 Line Editing Keys
Keys
Description
Delete
Delete character under cursor and shift remainder of line to left.
Backspace
Delete character to left of cursor and shift remainder of line to left.
CTRL+R
Toggle on and off. When toggled on, inserts text and shifts previous
text to right.

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Left Arrow
Move cursor to left.
Right Arrow
Move cursor to right
Tab
Help user to select appropriate token.
P or p
Display the previous page.
N, n or Space
Display the next page.
CTRL+C
Escape from displayed pages.
ESC
Escape from displayed pages.
Q or q
Escape from displayed pages.
R or r
refresh the displayed pages
A or 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.

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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 | 10_half | 10_full |
100_half | 100_full | 1000_full {[master | slave]} ] | flow_control [enable | disable] | learning
[enable | disable] | state [enable | disable] |mdix [auto | normal | cross] | [description <desc 1-
32> | clear_description]}
show ports {<portlist>} {[description | err_disabled | details | media_type]}
2-1 show session
Description
This command is used to display a list of currently users which are login to CLI sessions.
Format
show session
Parameters
None.
Restrictions
Only Administrator and Operator-level users can issue this command.
Example
To disable the password encryption:

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DGS-3120-24TC:admin#show session
Command: show session
ID Live Time From Level User
--- ------------ --------------------------------------- ----- ---------------
8 00:04:17.870 Serial Port admin Anonymous
Total Entries: 1
CTRL+C ESC qQuit SPACE nNext Page pPrevious Page rRefresh
2-2 show serial_port
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-3120-24TC:admin# show serial_port
Command: show serial_port
Baud Rate : 9600
Data Bits : 8
Parity Bits : None
Stop Bits : 1
Auto-Logout : 10 minutes
DGS-3120-24TC:admin#
2-3 config serial_port
Description
This command is used to configure the serial bit rate that will be used to communicate with the
management host and the auto logout time for idle connections.

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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 Administrator and Operator-level users can issue this command.
Example
To configure baud rate:
DGS-3120-24TC:admin# config serial_port baud_rate 9600
Command: config serial_port baud_rate 9600
Success.
DGS-3120-24TC:admin#
2-4 enable clipaging
Description
This command is used to enable the pausing of the screen display when the show command
output reaches the end of the page. For those show commands that provide the display refresh
function, the display will not be refreshed when clipaging is disabled. The default setting is enabled.
Format
enable clipaging
Parameters
None.

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Restrictions
Only Administrator and Operator-level users can issue this command.
Example
To enable pausing of the screen display when show command output reaches the end of the page:
DGS-3120-24TC:admin# enable clipaging
Command: enable clipaging
Success.
DGS-3120-24TC:admin#
2-5 disable clipaging
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 Administrator and Operator-level users can issue this command.
Example
To disable pausing of the screen display when show command output reaches the end of the page:
DGS-3120-24TC:admin# disable clipaging
Command: disable clipaging
Success.
DGS-3120-24TC:admin#
2-6 login
Description
This command is used to allow user login to the Switch.

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Format
login
Parameters
None.
Restrictions
None.
Example
To login the Switch with a user name dlink:
DGS-3120-24TC:admin# login
Command: login
UserName:dlink
PassWord:****
DGS-3120-24TC:admin#
2-7 logout
Description
This command is used to logout the facility.
Format
logout
Parameters
None.
Restrictions
None.
Example
To logout current user:

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DGS-3120-24TC:admin# logout
Command: logout
**********
* Logout *
**********
Press any key to login...
DGS-3120-24TC Gigabit Ethernet Switch
Command Line Interface
Firmware: Build 2.00.010
Copyright(C) 2011 D-Link Corporation. All rights reserved.
UserName:
2-8 ?
Description
This command is used to display the usage description for all commands in the cuurent login
account level or the specific one.
Format
?
Parameters
None.
Restrictions
None.
Example
To get “ping” command usage, descriptions:
DGS-3120-24TC:admin#? ping
Command: ? ping
Command: ping
Usage: <ipaddr> { times <value 1-255> | timeout <sec 1-99>}
Description: Used to test the connectivity between network devices.
DGS-3120-24TC:admin#

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2-9 clear
Description
The command is used to clear screen.
Format
clear
Parameters
None.
Restrictions
None.
Example
To clear screen:
DGS-3120-24TC:admin# clear
Command: clear
DGS-3120-24TC:admin#
2-10 show command_history
Description
The command is used to display command history.
Format
show command_history
Parameters
None.
Restrictions
None.
Example
To display command history:

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DGS-3120-24TC: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-3120-24TC:admin#
2-11 config command_history
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
None.
Example
To configure the number of command history:
DGS-3120-24TC:admin# config command_history 25
Command: config command_history 25
Success.
DGS-3120-24TC:admin#
2-12 config greeting_message
Description
This command is used to configure the greeting message (or banner).

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Format
config greeting_message {default}
Parameters
default - (Optional) Adding this parameter to the “config greeting_message” command will return
the greeting message (banner) to its original factory default entry.
Restrictions
Only Administrator and Operator-level users can issue this command.
Example
To edit the banner:
DGS-3120-24TC:admin#config greeting_message
Command: config greeting_message
Greeting Messages Editor
================================================================================
DGS-3120-24TC Gigabit Ethernet Switch
Command Line Interface
Firmware: Build 2.00.010
Copyright(C) 2011 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
--------------------------------------------------------------------------------
2-13 show greeting_message
Description
The command is used to display greeting message.
Format
show greeting_message
Parameters
None.