J-Tech Digital JTD-2887 User manual

24 PORT POE SWITCH
JTD-2886 | JTECH-NSP24
48 PORT POE SWITCH
JTD-2887 | JTECH-NSP48
USER MANUAL
J-TECH DIGITAL INC.
9807 EMILY LANE
STAFFORD, TX 77477
TEL: [phone]
E-MAIL: [email protected]

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Table of Contents
1. Introduction....................................................................................5
1.1 Product Information ..............................................................................5
1.2 Features ...............................................................................................5
2. Web Configuration .........................................................................6
2.1 Device Menu Information......................................................................7
2.1.1 Device > Basic.................................................................................. 7
2.1.2 Device > Maintenance...................................................................... 8
2.1.3 Device > Syslog................................................................................ 9
2.1.4 Device > Configuration ................................................................... 11
2.1.5 Device > Port Management............................................................ 12
2.1.6 Device > Port Mirroring................................................................... 15
2.1.7 Device > PoE ................................................................................. 16
2.1.8 Device > Users ............................................................................... 17
2.1.9 Device > VCT ................................................................................. 19
2.1.10 Device > Flow Interval .................................................................. 20
2.1.11 Device > NTP ............................................................................... 25
2.1.12 Device > SNMP............................................................................ 26
2.2 Network Menu Information..................................................................28
2.2.1 Network > VLAN............................................................................. 28
2.2.2 Network > VLAN Interface.............................................................. 31
2.2.3 Network > Protocol VLAN............................................................... 32
2.2.4 Network > DHCP Snooping............................................................ 34

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2.2.5 Network > MAC Filter ..................................................................... 36
2.2.6 Network > Link Aggregation ........................................................... 41
2.2.7 Network > LACP............................................................................. 43
2.2.8 Network > LLDP ............................................................................. 44
2.2.9 Network > IGMP Snooping............................................................. 47
2.2.10 Network > Multicast VLAN............................................................ 48
2.2.11 Network > IPv4 Routing................................................................ 49
2.2.12 Network > MSTP .......................................................................... 50
2.2.13 Network > DHCP.......................................................................... 53
2.2.14 Network > Telnet .......................................................................... 54
2.3 Authentication Menu Information ........................................................56
2.3.1 Authen > 802.1x ............................................................................. 56
2.3.2 Authen > AAA................................................................................. 57
2.3.3 Authen > Radius............................................................................. 58
2.4 Security Menu Information..................................................................59
2.4.1 Security > IP Filter .......................................................................... 59
2.4.2 Security > ARP Attack Defense...................................................... 61
2.4.3 Security > Loopback Detection....................................................... 63
2.5 QoS Menu Information .......................................................................65
2.5.1 QoS > ACL IPv4 ............................................................................. 65
2.5.2 QoS > ACL IPv6 .....................................................................68
2.5.3 QoS > ACL Policy........................................................................... 70
2.5.4 QoS > ACL Resource..................................................................... 71

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2.5.5 QoS > Ports Rate Limit................................................................... 71
2.5.6 QoS > QoS ..................................................................................... 72
3. Appendix......................................................................................74
4. Maintenance ................................................................................74
5. Warranty ......................................................................................74
6. Mail-In Service .............................................................................75
7. Limited Warranty Limits and Exclusions.......................................75

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1. Introduction
1.1 Product Introduction
This series supports IPv4 / IPv6 double stack platform, and supports a variety of senior management
functions, including POE management, MAC Table, VLANs, Port Isolation, Loop Protection, IGMP
Snooping, MLD Snooping, ERPS, DHCP client, DHCP Snooping, STP/RSTP/MSTP, 802.1 x, QoS, port
mirror, LLDP, static routing and NTP etc., 128 static routing and basic QINQ, to provide users with the
perfect solution; At the same time the whole series supports SNMP v1 / v2, v3 (Simple Network
Management Protocol), CLI command line, Web net tube, TELNET mode of Management, make
equipment management more convenient, at the same time, with the ACL control function, attack
prevention function, ensuring secure management.
The series complies with FCC and CE standards, and support 1 channel ac power input. Using the
mute fan, can adapt to work environment temperature range of - 40 ℃to 75 ℃, also, it can satisfy
the requirements of the various site and provide reliable, economical solution.
1.2 Features
•IEEE802.3, IEEE802.3u, IEEE802.3ab, IEEE802.3z, IEEE802.3ae
•V-Ring looped redundancy technology. Self-healing time for looped network is less than
20ms.
•PoE management, POE load timing restart and on-off.
•IGMP Snooping, Static multicast filtering, MLD Snooping filtering
•DHCP Snooping, protect from ARP attack, attack of illegal DHCP server access
•NTP, easy for real-time synchronization of network time
•Supports SNMP v1/v2/v3
•Supports LLDP
•ACL, enhance the flexibility and safety of network management
•QoS, enhance the stability of network
•Port mirror, convenient for online debug
•Cable testing, convenient for the examining cable length in a project
•STP/RSTP/MSTP, enhance the stability of network

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•IEEE802.1Q VLAN, IEEE802.1ad QINQ
•802.1x authentication to port and MAC
•Static routing L3 switching technology
•Operation temperature range: -40℃～75℃
•Storage temperature range: -40℃～85℃
2. Web Configuration
Open installed web browser on your PC, input the switch’s IP address like http://xxx.xxx.xxx.xxx, then
open that URL to login web management.
Note: IP address of switch is 192.168.2.1 by default. So please input http://192.168.2.1 in browser.
If you cannot access the switches web interface, please make sure that your PC is has a static IP that
matches the default IP of the switch (for ex. 192.168.2.11).
When the login window appears, please enter the default username "admin" with password "system".
Then click OK to login.
Default User Name: admin
Default Password: system

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2.1 Device Menu Information
2.1.1 Device > Basic
After successfully logging in to the page, the web page directly jumps to the system information page,
and you can also select the "Device Overview" or "Device → Basic Information" path to view the
switch system information. You can view the device's MAC address, software version, production
serial number, etc. on the system information page, modify the system name, MAC address aging
time (default 300 seconds).
The meaning of the key items on the page is shown in the table below.
Operation
Explanation
Software Version / Hardware Version /
Bootloader Version
Display the software version number, hardware
version number, and the bootloader version of
the currently running software
MAC Address
Displays the MAC address of the switch
Operation Hours
Displays the switches continuous running time
since being powered on
Production Serial Number (SN)
Shows the production serial number of the
switch
System Name
Customize the device name so that you can
quickly locate it by this name

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MAC Address Aging Time
Configure the aging time of the dynamic MAC
address entries. The default is 300 seconds.
2.1.2 Device > Maintenance
Equipment maintenance includes equipment software update, reboot, and fault maintenance.
Software Update:
Page wizard: Device → Maintenance → Software Update, the page is as shown in the figure below.
Upgrade the switch software to the latest version, which will make your device more stable and more
functional (click the <Browse...> button, select the latest version file, and click the <OK> button to
start the upgrade)
Do not power off the device during the upgrade process.
Reboot:
Page wizard: Device → Maintenance → Reboot, the page is as shown in the figure below. Select the
<Reboot> button to restart.

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Before restarting the device, please save the current configuration. Otherwise, after restarting,
unsaved configuration information will be lost.
Fault Maintenance:
Page Wizard: Device → Equipment Maintenance → Fault Maintenance, the page is shown below.
Select the <Fault Collecting> button, and all fault maintenance information will be backed up to your
PC.
2.1.3 Device > Syslog
The system log records information about hardware, software, and system problems in the system. It
can also monitor events that occur in the system, providing powerful support for network
administrators to monitor network operation and diagnose network faults.
Loglist:
Page Wizard: Device →Syslog →Loglist, the page is shown in the figure below.

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The meaning of the key items on the page is shown in the table below.
Operation
Explanation
Refresh Rate
Control the refresh rate of the page through the
selection of “Refresh Rate” drop down box
Query Item
Query the log information you need to follow
through the selection of the “Query Item” drop
down box
Positive Sequence Display
Log information is displayed in the order from
the first to the last. The reverse display is the
opposite
Download
Click the <Download> button to save all log
information locally for easy viewing
Refresh
Click the <Refresh> button to manually refresh
the log information
Clear
Click the <Clear> button to delete all log
information
Log Setup:
Page Wizard: Device →Syslog →Log Setup

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The meaning of the key items on the page is shown in the table below.
Operation
Explanation
Log Enables
Open / close the information center. By default,
the information center is turned on
Send Log Level
Only log information no higher than the
specified level can be sent to the log host
Log Host IP
Set the IP address of the log host
2.1.4 Device > Configuration
Save Configuration:
Page Wizard: Device →Configuration →Save Configuration
The meaning of the key items on the page is shown in the table below.
Operation
Explanation
Save current configuration
Click the <Save> button, after confirmation, you
can save the configuration information of the
current device
Backup system configuration information
Click the <Backup...> button and select the
backup path of the configuration file. You can
save the current configuration of the device to
your computer so that you can use this file
(*.cfg) to restore the configuration in the future.
Restore configuration information from a file
Click the <Browse> button, select the previously
backed up file (*.cfg), click <Restore Repeat...>
button, after confirmation, you can restore the
device to the previous configuration (after the

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device is automatically restarted, the
configuration takes effect)
After you have configured all items on the configuration page, be sure to save the configuration,
otherwise, the unsaved configuration information will be lost due to restarting and other operations.
Restore Default Configuration:
During the process of restoring the factory default configuration, please do not perform other
operations on the device, otherwise, the device may not work properly
The meaning of the key items on the page is shown in the table below.
Operation
Explanation
Restore configuration, but retain management
IP
Select this button, you can continue to use the
current IP
address to log in to the device for configuration
and
management
Restore the default configuration
Select this button, you need to use the default
IP address to log
in to the device for configuration and
management
2.1.5 Device > Port Management
Port Setup:
Page Wizard: Device →Port Management →Port Setup, shows the current port attribute status.

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Configure the properties of the specified ports in batches (click the <Batch Configuration> button on
the main page to enter the corresponding configuration page).
Configure the properties of a single port (click the entry corresponding to the port on the main page
to enter the corresponding configuration page).

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The meaning of the key items on the page is shown in the table below.
Operation
Explanation
Link status
The actual working speed and mode of the port,
if not connected, it will display as "--".
Rate
Configure port rate.
Duplex
There are three situations in the duplex mode of
the port:
•When you want the port to receive
packets while sending packets, you
can configure the port to be full-duplex
(full) attribute.
•When you want the port to only send or
receive packets at the same time, you
can configure the port to half-duplex
(Half) attribute.
•When you configure a port to be in auto-
negotiation (auto) state, the duplex
state of the port is determined by the
auto-negotiation between the local port
and the peer port.
By default, the speed and duplex mode of the
port is auto-negotiation.
Open /close
Turn on/off the port. If a port is displayed
closed, it cannot forward data. By default, the
port is open.
Priority
The priority level of the port is 0 to 7, with 0
being the lowest and 7 being the highest. For
packets without the 802.1Q label header, the
48G-4GF will use the port priority as the 802.1p
priority for the port to receive packets, and then
look up the local priority mapping table based
on the priority to mark the packet as a local
priority.
By default, the port priority is 0.
Flow Control
Turn on or off the port flow control function. If
the flow control function is enabled, when the
device is congested, it will send a message to
the peer switch to notify the peer switch to

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temporarily stop sending packets or slow
down the rate of sending packets, thereby
avoiding the occurrence of packet loss and
ensuring. The normal operation of the network
business.
By default, port flow control is disabled.
Isolation
Through the port isolation feature, you can add
the ports that need to be controlled to an
isolation group ("open" means to join the
isolation group; "close" means to exit the
isolation group), to achieve the layer 2 data
between the ports in the isolation group
Isolation not only enhances the security of the
network but also provides users with flexible
networking solutions.
By default, the port is not added to the isolation
group.
Energy saving
Turn on or turn off the energy-saving function of
the port in the downstate.
By default, the function is turned off.
EEE
Enable or disable the EEE (Energy Efficient
Ethernet) energy-saving function of the port. By
default, the EEE energy-saving function is not
enabled.
2.1.6 Device > Port Mirroring
Port mirroring is to copy the mirrored port packets to the monitoring port. The monitoring port is
connected to the data detection device. Users use these data detection devices to analyze the
packets copied to the monitoring port for network monitoring and troubleshooting.
The switch provides local port mirroring, that is, the mirrored port and monitoring port are on the
same device.
Page Wizard: Device →Port Mirroring, click the <No Mirror> button to quickly configure the
monitoring port to “None”, and configure the mirroring direction of all ports to “No Mirroring”.

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The meaning of the key items on the page is shown in the table below.
Operation
Explanation
Monitoring port
Select the monitoring port, "no mirror" indicates
that the port mirroring
function of the switch is disabled
Mirroring direction
Select the mirrored port, "no mirror" indicates
that the port is not mirrored
The meaning of the mirroring direction is as
follows:
•Mirror incoming port: only the packets
received by the port are mirrored to the
monitoring port
•Mirror out port: only the packets sent by
this port are mirrored to the monitoring
port
•Mirroring in and out ports: packets
going in and out of this port are
mirrored to the monitoring port
2.1.7 Device > PoE
PoE Summary:
Page Wizard: Device →PoE →PoE Summary. Shows the current PoE status for all available ports.

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PoE Setup:
Page Wizard: Device →PoE →PoE Setup. Allows you to set the PoE status and priority of single or
multiple ports.
2.1.8 Device > Users
Page Wizard: Device → Users. On this page, you can configure the user timeout time, turn on/off the
WEB authentication function, and turn on/off the WEB verification code function.

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Steps to add a local user:
Click the <New> button on the main page, set the new user-related information on the "Add Local
User" page, and click the <OK> button to take effect.
Steps to modify local users:
Click on the local user entry to be modified on the main page to enter the "Modify Local User" page
for modification.
The meaning of the key items on the page is shown in the table below.
Operation
Explanation
Overtime time
Configure the timeout time of the web settings
page, the default is 5 minutes
WEB user authentication
Turn on/off the user authentication function.
After closing, the user does not need to verify

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when logging in
WEB login verification code
Turn on/off the WEB login verification code
function. After opening, you need to enter the
verification code when logging in to WEB
Username
Set the local username to be added
Confirm password
Set local user password
State
Set the status of local users
Rank
Set the level of local users
2.1.9 Device > VCT
When the line is faulty, you can diagnose the cable connected to the port, which is convenient for you
to check the working condition of the cable in the network.
Page Wizard: Device → VCT. Enter the port number to be diagnosed in the "Port" text box and click
the <OK> button to complete the cable diagnosis of the port.
The meaning of the key items on the page is shown in the table below.
Operation
Explanation
State
Display the connection status of the port. The
display as "normal" indicates that the port is
connected; the display as "open" indicates that
the port is not connected; the display as "short
circuit" indicates that a pair of differential lines

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have a short circuit.
Length
•When the cable status is "normal", the
length of the connecting cable is not
reflected in the displayed information.
•When the cable status is "short circuit
or open circuit", the length in the
displayed information refers to the
length from the port to the abnormal
position.
•During the cable diagnosis process, please do not plug or unplug the port network cable, and
the diagnosed port cannot be in the shutdown state.
•The cable diagnosis is only valid when there is no device connection at the other end of the
network cable or the network cable is abnormal. When both ends of the network cable is
connected, the diagnosis result may be invalid. For normal network cable quality testing,
please use professional network cable testing.
2.1.10 Device > Flow Interval
Port Traffic Statistics:
Page Wizard: Device → Flow Interval → Port Traffic Statistics. The port statistics page can view the
number of data packets received/sent by each port of the switch.
To view, the number of various types of error packets received/sent on the designated port of the
48G-4GF device (click the entry corresponding to the port on the main page to enter the
corresponding statistical information page).