IMPORTANT!
READ CAREFULLY BEFORE USE.
KEEP THIS GUIDE FOR FUTURE REFERENCE.
Note: This guide is a reference for a series of products. Therefore some features or
options in this guide may not be available in your product.
Screenshots and graphics in this book may differ slightly from your product due to differences in
your product firmware or your computer operating system. Every effort has been made to ensure
that the information in this manual is accurate.
Related Documentation
• CLI Reference Guide
The CLI Reference Guide explains how to use the Command-Line Interface (CLI) and CLI
commands to configure the Switch.
•More Information
Go to support.zyxel.com to find other information on the Switch
.
MGS3750-28F User’s Guide
2
Contents Overview
Contents Overview
Hardware Installation and Connection ......................................................................................................7
2.1 Front Panel .......................................................................................................................................10
2.1.1 Console Port ............................................................................................................................10
Overall Web Page Layout...................................................................................................................16
4.1 Port Status ......................................................................................................................................... 16
5.1 System Info .......................................................................................................................................18
5.2 General Application ........................................................................................................................... 19
5.3 IP Setup ............................................................................................................................................20
5.4 Port Setup .........................................................................................................................................20
6.10 Link Aggregation .............................................................................................................................41
6.10.1 Link Aggregation Setting ....................................................................................................... 42
6.10.2 Link Aggregation Control Protocol .........................................................................................44
6.10.3 Group ID ................................................................................................................................44
6.10.4 Port ........................................................................................................................................45
6.11 Port Security .................................................................................................................................... 45
7.2 Access Control ..................................................................................................................................63
7.4.1 Syslog Server Setup ................................................................................................................69
MGS3750-28F User’s Guide
5
Table of Contents
Appendix A Customer Support ..........................................................................................................71
Appendix B Legal Information............................................................................................................77
MGS3750-28F User’s Guide
6
Hardware Installation and Connection
This chapter shows you how to install and connect the Switch.
1.1 Installation Scenarios
The Switch can be placed on a desktop or rack-mounted on a standard EIA rack. Use the rubber
feet in a desktop installation and the brackets in a rack-mounted installation.
Note: For proper ventilation, allow at least 4 inches (10 cm) of clearance at the front and
3.4 inches (8 cm) at the back of the Switch. This is especially important for
enclosed rack installations.
CHAPTER 1
1.2 Desktop Installation Procedure
1Make sure the Switch is clean and dry.
2Set the Switch on a smooth, level surface strong enough to support the weight of the Switch and
the connected cables. Make sure there is a power outlet nearby.
3Make sure there is enough clearance around the Switch to allow air circulation and the attachment
of cables and the power cord.
1.3 Mounting the Switch on a Rack
The Switch can be mounted on an EIA standard size, 19-inch rack or in a wiring closet with other
equipment. Follow the steps below to mount your Switch on a standard EIA rack using a rackmounting kit.
1.3.1 Rack-mounted Installation Requirements
• Two mounting brackets.
• Eight M3 flat head screws and a #2 Philips screwdriver.
• Four M5 flat head screws and a #2 Philips screwdriver.
Failure to use the proper screws may damage the unit.
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Chapter 1 Hardware Installation and Connection
1.3.1.1 Precautions
• Make sure the rack will safely support the combined weight of all the equipment it contains.
• Make sure the position of the Switch does not make the rack unstable or top-heavy. Take all
necessary precautions to anchor the rack securely before installing the unit.
1.3.2 Attaching the Mounting Brackets to the Switch
1Position a mounting bracket on one side of the Switch, lining up the four screw holes on the br acket
with the screw holes on the side of the Switch.
Figure 1 Attaching the Mounting Brackets
2Using a #2 Philips screwdriver, install the M3 flat head screws through the mounting bracket holes
into the Switch.
3Repeat steps 1 and 2 to install the second mounting bracket on the other side of the Switch.
4You may now mount the Switch on a rack. Proceed to the next section.
1.3.3 Mounting the Switch on a Rack
1Position a mounting bracket (that is already attached to the Switch) on one side of the rack, lining
up the two screw holes on the bracket with the screw holes on the side of the rack.
Figure 2 Mounting the Switch on a Rack
MGS3750-28F User’s Guide
8
Chapter 1 Hardware Installation and Connection
2Using a #2 Philips screwdriver, install the M5 flat head screws through the mounting bracket holes
into the rack.
3Repeat steps 1 and 2 to attach the second mounting bracket on the other side of the rack.
MGS3750-28F User’s Guide
9
This chapter describes the front panel and rear panel of the Switch and shows you how to make the
Dual Personality Interfaces
SFP or SFP+ Slots
Console Port
Power Connection
hardware connections.
2.1 Front Panel
The following figure shows the front panel of the Switch.
Figure 3 MGS3750-28F Front Panel: AC/DC Model
CHAPTER 2
Hardware Overview
The following table describes the port labels on the front panel.
Table 1 Front Panel Connections
LABELDESCRIPTION
Power
Connection
SFP or SFP+
Slots
Four Dual
Personality
Interfaces
Console PortThe console port is for local configuration of the Switch.
2.1.1 Console Port
For local management, you can use a computer with terminal emulation software configured to the
following parameters:
Connect an appropriate power supply to this port.
Use SFP or SFP+ transceivers in these slots for fiber-optic or copper connections to a
computer, a hub, a switch or a router. You can also insert a SFP+ Direct Attach Copper
(DAC) in the SFP+ Slot.
Each interface has one 10/100/1000 BASE-T RJ-45 port and one transceiver slot. You can
activate one port or one transceiver slot at a time.
•Four 10/100/1000 BASE-T RJ-45 Ports:
Connect these ports to high-bandwidth backbone network Ethernet switches using 10/
100/1000G BASE-T compatible copper cables.
•Four Transceiver Slots:
Use mini-GBIC or SFP transceivers in these slots for connections to backbone Ethernet
switches.
MGS3750-28F User’s Guide
10
Chapter 2 Hardware Overview
• VT100
• Terminal emulation
• 115200 bps
• No parity, 8 data bits, 1 stop bit
• No flow control
Connect the male 9-pin end of the console cable to the console port of the Switch. Connect the
female end to a serial port (COM1, COM2 or other COM port) of your computer.
2.1.1.1 Default Ethernet Negotiation Settings
The factory default negotiation settings for the Gigabit ports on the Switch are:
• Speed: Auto
•Duplex: Auto
• Flow control: Off
• Link Aggregation: Disabled
2.1.1.2 Auto-crossover
All ports are auto-crossover, that is auto-MDIX ports (Media Dependent Interface Crossover), so
you may use either a straight-through Ethernet cable or crossover Ethernet cable for all Gigabit port
connections. Auto-crossover ports automatically sense whether they need to function as crossover
or straight ports, so crossover cables can connect both computers and switches/hubs.
2.1.2 Transceiver Slots
These are slots for mini-GBIC (Gigabit Interface Converter) transceivers or 100 Mbps Small Formfactor Pluggable (SFP) transceivers. A transceiver is a single unit that houses a transmitter and a
receiver. The Switch does not come with transceivers. You must use transceivers that comply with
the SFP Transceiver MultiSource Agreement (MSA). See the SFF committee’s INF-8074i
specification Rev 1.0 for details.
You can change transceivers while the Switch is operating. You can use different transceivers to
connect to Ethernet switches with different types of fiber-optic or even copper cable connectors.
To avoid possible eye injury, do not look into an operating fiber-optic
module’s connectors.
• Type: SFP connection interface
• Connection speed: 1 Gigabit per second (Gbps) or 1 Megabit per second (Mbps)
2.1.2.1 Transceiver Installation
Use the following steps to install a mini-GBIC transceiver (SFP module).
1Insert the transceiver into the slot with the exposed section of PCB board facing down.
2Press the transceiver firmly until it clicks into place.
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11
Chapter 2 Hardware Overview
3The Switch automatically detects the installed transceiver. Check the LEDs to verify that it is
functioning properly.
4Close the transceiver’s latch (latch styles vary).
5Connect the fiber optic cables to the transceiver.
Figure 4 Transceiver Installation Example
Figure 5 Connecting the Fiber Optic Cables
2.1.2.2 Transceiver Removal
Use the following steps to remove a mini-GBIC transceiver (SFP module).
1Remove the fiber optic cables from the transceiver.
2Open the transceiver’s latch (latch styles vary).
3Pull the transceiver out of the slot.
Figure 6 Removing the Fiber Optic Cables
Figure 7 Opening the Transceiver’s Latch Example
Figure 8 Transceiver Removal Example
MGS3750-28F User’s Guide
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2.1.3 Power Connector
Make sure you are using the correct power source as shown on the panel and that no objects
obstruct the airflow of the fans.
Use the following procedures to connect the Switch to a power source after you have installed it.
Note: Check the power supply requirements on the panel, and make sure you are using
an appropriate power source.
Keep the power supply switch and the Switch’s power switch in the OFF
position until you come to the procedure for turning on the power.
Use only power wires of the required diameter for connecting the Switch to a power supply.
2.1.3.1 AC Power Connection
Connect the female end of the power cord to the power socket of your Switch. Connect the other
end of the cord to a power outlet.
2.1.3.2 DC Power Connection
Chapter 2 Hardware Overview
The Switch uses a single ETB series terminal block plug with four pins which allows you to connect
up to two separate power supplies. If one power supply fails the system can operate on the
remaining power supply . Use two wires to connect to a single terminal pair, one wire for the positive
terminal and one wire for the negative terminal.
Note: The current rating of the power wires must be greater than 20 Amps. The power
supply to which the Switch connects must have a built-in circuit breaker or switch
to toggle the power.
Note: When installing the power wire, push it firmly into the terminal as deep as possible
and make sure that no exposed (bare) wire can be seen or touched.
Exposed power wire is dangerous. Use extreme care when connecting a
DC power source to the device.
To connect a power supply:
1Use a screwdriver to loosen the terminal block captive screws.
2Connect one end of a power wire to the Switch’s RTN (return) pin and tighten the captive screw.
3Connect the other end of the power wire to the positive terminal on the power supply.
4Connect one end of a power wire to the Switch’s -48V (input) pin and tighten the captive screw.
5Connect the other end of the power wire to the negative terminal on the power supply.
6Insert the terminal block plug in the Switch’s terminal block header.
MGS3750-28F User’s Guide
13
2.2 LEDs
After you connect the power to the Switch, view the LEDs to ensure proper functioning of the
Switch and as an aid in troubleshooting.
Table 2 LED Descriptions
LEDCOLORSTATUSDESCRIPTION
PWRGreenOnThe system is turned on.
SYSGreenOn The system is on and functioning properly.
ALM RedOnA hardware failure is detected, or an external alarm is active.
100/1000 Mbps SFP Slots (1 LED Per Port)
1 ~ 24GreenOnThe link to the network is up.
1/10G SFP+ Slots (1 LED Per Port)
25 ~ 28GreenOnThe link to the network is up.
10/100/1000 BASE-T Ethernet Ports (in Dual Personality Interface)
LNK/ACTGreenOnThe link to the network is up.
Chapter 2 Hardware Overview
OffThe system is off.
BlinkingThe system is rebooting and performing self-diagnostic tests.
OffThe power is off or the system is not ready/malfunctioning.
OffThe system is functioning normally.
BlinkingMini SFP port is receiving or transmitting data.
OffThis link is disconnected or failed
BlinkingMini SFP port is receiving or transmitting data.
OffThis link is disconnected or failed
BlinkingThe port is receiving or transmitting data.
OffThis link is disconnected or failed.
MGS3750-28F User’s Guide
14
Logging into the Web Interface
3.1 Launch Browser
Enter http://device IP (default administration IP: 192.168.1.1). Press Enter.
The login page appears. The default user name is "admin", and the default password is "1234".
Select English or Chinese interface.
Figure 9 Login
CHAPTER 3
Click on the Login button to enter the web setup interface.
MGS3750-28F User’s Guide
15
4.1 Port Status
Shown below is an illustration of the web setup interface after logging in.
Figure 10 Port Status Screen
CHAPTER 4
Overall Web Page Layout
The following table describes the labels in this screen.
Table 3 Port Status Screen
LABELDESCRIPTION
PortThis identifies the Ethernet port. Click a port number to display the Port Details screen.
NameThis is the name you assigned to this port in the Port Setup screen.
LinkThis field displays the speed (either 10 for 10Mbps, 100 for 100Mbps, 1000 for 1000bps, or
Set SpeedThis field helps you set port speed. The speed is set to auto by default.
10000 for 1Gbps ) and the duplex (F for full duplex or H for half). It also shows the cable
type (Copper or Fiber) for the combo ports.
MGS3750-28F User’s Guide
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Chapter 4 Overall Web Page Layout
Table 3 Port Status Screen (continued)
LABELDESCRIPTION
StateIf STP (Spanning Tree Protocol) is enabled, this field displays the STP state of the port.
If STP is disabled, this field displays FORWARDING if the link is up, otherwise, it displays
STOP.
When LACP (Link Aggregation Control Protocol), STP, and dot1x are in blocking state, it
displays Blocking.
LACPThis fields displays whether LACP (Link Aggregation Control Protocol) has been enabled on
the port.
TxPktsThis field shows the number of transmitted frames on this port.
RxPktsThis field shows the number of received frames on this port.
ErrorsThis field shows the number of received errors on this port.
Tx KB/sThis field shows the number of kilobytes per second transmitted on this port.
Rx KB/sThis field shows the number of kilobytes per second received on this port.
Up TimeThis field shows the total amount of time in hours, minutes and seconds the port has been
up.
Clear CounterSelect Port, enter a port number and then click Clear Counter to erase the recorded
statistical information for that port, or select Any to clear statistics for all ports.
MGS3750-28F User’s Guide
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5.1 System Info
View basic system information. The IP address and system name can also be set here.
Figure 11 System Information Screen
CHAPTER 5
Basic Settings
The following table describes the labels in this screen.
Table 4 System Information Screen
LABELDESCRIPTION
Product
description
bootrom
version
Software
Version
MAC Address This field displays the MAC addresses of the Switch.
IP addressThis field displays the current IP address of the Switch.
Subnet maskThis field displays the current subnet mask.
Default
Gateway
System
startup time
System
Application
Switch
temperature
System NameThis field displays the name used to identify the Switch on any network.
This field displays the descriptive name of the Switch for identification purposes.
This field displays the version number of the Switch’s bootrom.
This field displays the version number of the Switch's current software.
This is the IP address of the default gateway, if applicable.
This field displays how long the Switch has been running since it last started up.
This field displays whether the Switch runs on default or secondary software application.
The Switch has temperature sensors that are capable of detecting and reporting if the
temperature rises above the threshold.
MGS3750-28F User’s Guide
18
Table 4 System Information Screen (continued)
LABELDESCRIPTION
System
Location
Web page
tiimeout (in
munute)
This field displays the geographic location of your Switch.
This field displays how many minutes a management session can be left idle before the
session times out. After it times out y ou h ave to log in with your password again. Very long
idle timeouts may have security risks. A value of "0" means a management session never
times out, no matter how long it has been left idle (not recommended).
5.2 General Application
View data such as device description, device OID, and number of ports.
Figure 12 General Setup Screen
Chapter 5 Basic Settings
The following table describes the labels in this screen.
Table 5 General Setup Screen
LABELDESCRIPTION
System
description
System object ID An OID (Object ID) that begins with “1.3.6.1.4.1.890.1. 5.8.81” is defined in private MIBs.
System port
quantity
System startup
time
System NameChoose a descriptive name for identification purposes. This name consists of up to 64
System LocationEnter the geographic location of your Switch. You can use up to 32 printable ASCII
System ContactEnter the name of the person in charge of this Switch. You can use up to 32 printable
Product
description
RefreshClick Refresh to update the screen.
ModifyClick Modify to save your changes to the Switch’s run-time memory. The Switch loses
This field tells what this device is.
Otherwise, it is a standard MIB OID.
This field displays how many ports the Switch has.
This field displays how long the Switch has been running since it last started up.
printable characters; spaces are allowed.
characters; spaces are allowed.
ASCII characters; spaces are allowed.
This field displays the descriptive name of the Switch for identification purposes.
these changes if it is turned off or loses power.
MGS3750-28F User’s Guide
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5.3 IP Setup
Set system IP, gateway, and subnet mask here.
Figure 13 IP Address Settings Screen
The following table describes the labels in this screen.
Table 6 IP Address Settings Screen
LABELDESCRIPTION
by MANUALSelect by MANUAL to configure IP address, subnet mask, and default gateway manually.
IP AddressThis field displays IP address of the Switch in the IP domain.
Default GatewayThis is the IP address of the default gateway, if applicable.
Subnet maskThis field displays the current subnet mask.
System MAC
address
RefreshClick Refresh to update the screen.
ModifyClick Modify to save your changes to the Switch’s run-time memory. The Switch loses
Chapter 5 Basic Settings
This field displays the MAC addresses of the Switch.
these changes if it is turned off or loses power.
5.4 Port Setup
Set port speed, priority, and enable/disable ports. View the status of all ports.
Note: "O" means connected, and "-" m e ans not connected.
MGS3750-28F User’s Guide
20
Chapter 5 Basic Settings
Figure 14 Port Basic Settings Screen
The following table describes the fields in this screen.
Table 7 Port Basic Settings Screen
LABELDESCRIPTION
Port Number"O" means connected, and "-" means not connecte d.
PortThis is the port index number.
StatusSet port status to "disable" to turn off the port; ports are enabled by default.
LinkThis f ield displays the link is up or down.
PrioritySet port priority; priority is a value between 0-7.
Set SpeedThis field helps you set port speed. The speed is set to auto by default.
ModeSelect the speed and the duplex mode of the Ethernet connection on this port.
Selecting auto (auto-negotiation) allows one port to negotiate with a peer port
automatically to obtain the connection speed and duplex mode that both ends
support.
You can also select other options, such as Master and Slaver.
Actual SpeedThis field displays the current speed of the port.
Port Description (0-
128 Chars)
RefreshClick Refresh to update the screen.
ModifyClick Modify to save your changes to the Switch’s run-time memory . The Switch loses
You can add descriptions to a port in this field.
these changes if it is turned off or loses power.
MGS3750-28F User’s Guide
21
Advanced Application Configurations
6.1 VLAN
This chapter shows you how to configure port-based VLANs.
6.1.1 VLAN Status
Use this screen to view and search all VLAN groups.
Figure 15 VLAN Status Screen
CHAPTER 6
The following table describes the labels in this screen.
Table 8 VLAN Status Screen
LABELDESCRIPTION
VLAN Search by
VID
The Number of
VLAN
The Number of
Search Results
IndexThis is the VLAN index number. Click on an index number to view more VLAN details.
VIDThis is the VLAN identification number that was configured in the Static VLAN screen.
Elapsed Time This field shows how long it has been since a normal VLAN was registered or a static VLAN
Enter an existing VLAN ID number(s) (separated by a comma) and click Search to display
only the specified VLAN(s) in the list below.
Leave this field blank and click Search to display all VLANs configured on the Switch.
This is the number of VLANs configured on the Switch.
This is the number of VLANs that match the searching criteria and display in the list below.
This field displays only when you use the Search button to look for certain VLANs.
was set up.
MGS3750-28F User’s Guide
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Chapter 6 Advanced Application Configurations
Table 8 VLAN Status Screen (continued)
LABELDESCRIPTION
StatusThis field shows how this VLAN was added to the Switch.
Dynamic: using GVRP
Static: added as a permanent entry
Voice: manually added as a Voice VLAN
MVR: added via multicast VLAN registration
Private - manually added as a private VLAN (primary, isolated or community)
Port NumberThis column displays the ports that are participating in a VLAN. A tagged port is marked as
T, an untagged port is marked as U and ports not participating in a VLAN are marked as “–“.
6.1.2 VLAN Port Settings
Use the VLAN Port Setup screen to configure the static VLAN settings on a port.
Figure 16 VLAN Port Settings Screen
The following table describes the fields in this screen.
Table 9 VLAN Port Settings Screen
LABELDESCRIPTION
VLAN StatusReturn to the VLAN status page.
Global GVRPEnable global GVRP function.
PortThis field displays the port number.
PVIDA PVID (Port VLAN ID) is a tag that adds to incoming untagged frames received on a
port so that the frames are forwarded to the VLAN group that the tag defines.
Enter a number between 1and 4094 as the port VLAN ID.
MGS3750-28F User’s Guide
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Chapter 6 Advanced Application Configurations
Table 9 VLAN Port Settings Screen
LABELDESCRIPTION
Acceptable FrameSpecify the type of frames allowed on a port. Choices are All, Tag Only and Untag
Only.
Select All from the drop-down list box to accept all untagged or tagged frames on this
port. This is the default setting.
Select Tag Only to accept only tagged frames on this port. All untagged frames will be
dropped.
Select Untag Only to accept only untagged frames on this port. All tagged frames will
be dropped.
Port ModeEdit the port mode; there are three port modes:
Select Hybrid mode and port can be tagged or untagged within a VLAN; it can also
be a member of multiple VLANs.
Select Trunk mode and port must be tagged within a VLAN; it can also be a member
of multiple VLANs.
Select Access mode and port must be untagged within a VLAN; this port can only be
inside one VLAN.
Port GVRPEnable the port's GVRP (Dynamic VLAN learning function; port must be set to Trunk
mode).
Ingress CheckIf this check box is selected, the Switch discards incoming frames on a port for VLANs
that do not include this port in its member set.
Clear this check box to disable ingress filtering.
6.1.3 Static VLAN
Add, edit, or remove VLAN ports.
If a new VLAN is added with VID=10 that contains 1 Tagged port and 2 Untagged ports, the user
can click on the white area underneath the port number to edit its member ports. The Modify
function is identical to Add.
Figure 17 Static VLAN Screen
MGS3750-28F User’s Guide
24
Chapter 6 Advanced Application Configurations
The following table describes the labels in this screen.
Table 10 Static VLAN Screen
LABELDESCRIPTION
Current static
VLAN
Port NumberThis column displays the ports that are participating in a VLAN. A tagged port is marked as
VLAN Group IDEnter the VLAN ID for this static entry; the valid range is between 1 and 4094.
Select the static VLAN group, and make configurations to the group.
T, an untagged port is marked as U and ports not participating in a VLAN are marked as “–“.
NameEnter a descriptive name for the VLAN group for identification purposes. This name consists
RefreshClick Refresh to update the screen.
AddClick Add to save your changes to the Switch’s run-time memory. The Switch loses these
ModifySelect a static VLAN group from Current static VLAN field, and make configurations to the
DeleteClick Delete to remove the VLAN group ID.
CancelClick Cancel to change the fields back to their last saved values.
VIDThis field displays the ID number of the VLAN group. Click the number to edit the VLAN
NameThis field diesplays the name of the VID.
DeleteSelect the check box to delete the VID.
of up to 64 printable characters. Spaces are allowed.
changes if it is turned off or loses power.
group.
settings.
6.2 Static Mac Forwarding
Manually add dynamic, static, blackhole, and permanent MAC addresses.
A static MAC address is an address that has been manually entered in the MAC address table. Static
MAC addresses do not age out. When you set up static MAC address rules, you are setting static
MAC addresses for a port. This may reduce the need for broadcasting.
Static MAC address forwarding together with port security allow only computers in the MAC address
table on a port to access the Switch.
A blackhole port drops traffic without notifying the sources.
MGS3750-28F User’s Guide
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