Comtrend Corporation GS-7424 User manual

August 2018, v1.0
USER MANUAL
GS-7424, GS-7620, & GS-7624
Smart Lite Gigabit (PoE)

Copyright ©2018 Comtrend Corporation. All rights reserved. No part of this
publication may be reproduced, transmitted, transcribed, stored in a retrieval system,
or translated into any language or computer language, in any form or by any means
without the prior written permission of Comtrend Corporation.
Technical Support
Thank you for choosing Comtrend. If you find the product to be inoperable or
malfunctioning, please contact technical support by email (INT-support@comtrend.
com) for immediate service.
For product updates, new product releases, manual revisions, or software upgrades,
please visit our website at http://www.comtrend.com
Trademarks
Comtrend Corporation makes no representations or warranties, either expressed or
implied, with respect to the contents hereof and specifically disclaims any warranties,
merchantability or fitness for any particular purpose. Any software described in this
manual is sold or licensed “as is”. Should the programs prove defective following their
purchase, the buyer (and not Comtrend Corporation, its distributors, or its dealers)
assumes the entire cost of all necessary servicing, repair, and any incidental or
consequential damages resulting from any defect in the software. Further, Comtrend
Corporation reserves the right to revise this publication and to make changes from
time to time in the contents thereof without obligation to notify any person of such
revision or changes.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this
program. If not, see http://www.gnu.org/licenses/.
This document is subject to change without notice.

Table of Contents
i
Table of Contents
1. Introduction .................................................................................................................... 2
1.1. Overview..................................................................................................................... 2
1.2. Package contents ......................................................................................................... 2
1.3. Features ....................................................................................................................... 3
1.4. Specifications .............................................................................................................. 3
1.5. Front and Back Panel Configuration........................................................................... 4
1.5.1. Ports......................................................................................................................... 4
1.5.2. LED Indicators ........................................................................................................ 6
2. Installation ...................................................................................................................... 9
2.1. Mounting the Switch ................................................................................................... 9
2.1.1. Placement Tips..............................................................................................................9
2.1.2. Rack Mounting ...................................................................................................... 10
3. Getting Started ............................................................................................................. 12
3.1. Power ........................................................................................................................ 12
3.1.1. Connecting to Power ............................................................................................. 12
3.1.2. Connecting to the Network.................................................................................... 13
3.1.3. Power over Ethernet (PoE) Considerations........................................................... 13
3.1.4. Starting the Web-based Configuration Utility ....................................................... 14
3.1.5. Logging In ............................................................................................................. 16
4. Web-based Switch Configuration ............................................................................... 18
4.1. Status......................................................................................................................... 19
4.1.1. System Information ............................................................................................... 19
4.1.2. Logging Message................................................................................................... 21
4.1.3. Port ........................................................................................................................ 22
4.1.4. Link Aggregation................................................................................................... 25
4.1.5. MAC Address Table .................................................................................................... 25
4.2. Network..................................................................................................................... 26
4.2.1. IP Address.............................................................................................................. 26
4.2.2. System Time ...............................................................................................................28
4.3. Port ............................................................................................................................ 30
4.3.1. Port Setting ............................................................................................................ 30
4.3.2. Error Disabled ....................................................................................................... 31

Table of Contents
ii
4.3.3. Link Aggregation................................................................................................... 33
4.3.4. EEE........................................................................................................................ 36
4.3.5. Jumbo Frame ......................................................................................................... 37
4.4. PoE ............................................................................................................................ 38
4.4.1. Global Setting........................................................................................................ 38
4.4.2. Priority Setting....................................................................................................... 40
4.4.3. Power Limit ........................................................................................................... 41
4.4.4. Power Show........................................................................................................... 42
4.5. VLAN........................................................................................................................ 43
4.5.1. VLAN.................................................................................................................... 43
4.5.2. Voice VLAN .......................................................................................................... 48
4.5.3. MAC VLAN.......................................................................................................... 50
4.6. MAC Address Table........................................................................................................ 52
4.6.1. Dynamic Address................................................................................................... 52
4.6.2. Static Address ........................................................................................................ 53
4.6.3. Filtering Address ................................................................................................... 54
4.7. Spanning Tree.................................................................................................................55
4.7.1. Property ................................................................................................................. 55
4.7.2. Port Setting ............................................................................................................ 57
4.7.3. MST Instance......................................................................................................... 58
4.7.4. MST Port Setting................................................................................................... 59
4.7.5. Statistics................................................................................................................. 60
4.8. Discovery .................................................................................................................. 61
4.8.1. LLDP ..................................................................................................................... 61
4.9. Multicast.................................................................................................................... 68
4.9.1. General .................................................................................................................. 68
4.9.2. IGMP Snooping..................................................................................................... 71
4.9.3. MVR...................................................................................................................... 74
4.10. Security ..................................................................................................................... 78
4.10.1. RADIUS ................................................................................................................ 78
4.10.2. Management Access .............................................................................................. 79
4.10.3. Authentication Manager ........................................................................................ 83
4.10.4. Port Security .......................................................................................................... 87
4.10.5. Protected Port ........................................................................................................ 89
4.10.6. Storm Control ........................................................................................................ 90
4.10.7. DoS........................................................................................................................ 92

Table of Contents
iii
4.10.8. DHCP Snooping .................................................................................................... 95
4.10.9. IP Source Guard..................................................................................................... 99
4.11. ACL......................................................................................................................... 102
4.11.1. MAC ACL ........................................................................................................... 102
4.11.2. MAC ACE ........................................................................................................... 103
4.11.3. IPv4 ACL............................................................................................................. 104
4.11.4. IPv4 ACE............................................................................................................. 104
4.11.5. ACL Binding ....................................................................................................... 106
4.12. QoS.......................................................................................................................... 107
4.12.1. General ................................................................................................................ 107
4.12.2. Rate Limit............................................................................................................ 111
4.13. Diagnostics.............................................................................................................. 112
4.13.1. Logging ............................................................................................................... 112
4.13.2. Mirroring ............................................................................................................. 114
4.13.3. Ping...................................................................................................................... 115
4.13.4. Traceroute............................................................................................................ 116
4.13.5. Copper Test.................................................................................................................. 117
4.13.6. Fiber Module ....................................................................................................... 117
4.13.7. UDLD.................................................................................................................. 118
4.14. Management............................................................................................................ 119
4.14.1. User Account ....................................................................................................... 119
4.14.2. Firmware ............................................................................................................. 120
4.14.3. Configuration....................................................................................................... 122
4.14.4. SNMP .................................................................................................................. 124
4.14.5. Time Range.......................................................................................................... 131
5. Federal Communication Commission Interference Statement.............................. 132

1
Safety and Regulatory
Audience
This guide is for the networking professional managing the standalone GS-7000
switch series. It is recommended that only professionals with experience working
with Comtrend networking devices who are familiar with the Ethernet and local area
networking terminology, should service the equipment.
Conventions
The following conventions are used in this manual to convey instructions and
information:
Command descriptions use these conventions:
•Commands and keywords are in boldface text.
•Arguments for which you supply values are in italic.
•Square brackets ([ ]) mean optional elements.
•Braces ({ }) group required choices, and vertical bars ( | ) separate the
alternative elements.
•Braces and vertical bars within square brackets ([{ | }]) mean a required choice
within an optional element.
Interactive examples use these conventions:
•Nonprinting characters, such as passwords or tabs, are in angle brackets (< >).
Notes and cautions use the following conventions and symbols:
Note
Means additional information. Notes contain additional useful information or
references to material available outside of this document.
Caution
Indicates that the reader must be careful. In a situation where a Caution is listed, a
user may cause equipment damage or loss of data.

Introduction
2
1. Introduction
Thank you for choosing Comtrend GS-7424, GS-7620, or GS-7624 Smart Lite
Gigabit (PoE) switch. This device is designed to be operational rightout-of-the-box
as a standard bridge. In the default configuration, it will forward packets between
connecting devices after powered up.
Before you begin installing the switch, make sure you have all of the package contents
available, and a PC with a web browser for using web-based system management
tools.
1.1. Overview
The Comtrend GS-7620 and GS-7624 Smart Lite Gigabit PoE switches provide 20 and
24 Gigabit PoE+ ports, respectively.
While the GS-7620 provides four mini-GBIC/SFP slots for combo ports, the GS-7624
has four Gigabit SFP slots. In comparison the GS-7424 provides 24 Gigabit ports and
four Gigabit SFP slots.
Designed for medium to large network environments, the Smart Lite Gigabit PoE
Switch series include a standard 19-inch rack-mount design for greater installation
options.
1.2. Package contents
Before using the product, verify that the following items are included in the packing
contents. If any item is damaged, please contact your dealer immediately.
•GS-7620 Smart Lite Gigabit PoE Switch, GS-7624 Smart Lite Gigabit PoE Switch,
or GS-7424 Smart Lite Gigabit Switch
•Quick Installation Guide
•Power Cord
•Rack Mount Kit
•Foot pads

Introduction
3
1.3. Features
The following information displays the key features for the before mentioned models:
QoS
The switch offers a powerful QoS function. This function supports 802.1p VLAN tag
priority and DSCP on Layer 3 of network framework.
VLAN
Supports Port-based VLAN and IEEE802.1Q Tag VLAN. Supports 24 active VLANs and
VLAN ID 1~4094.
Port Trunking
Allows one or more links to be aggregated to form a Link Aggregation Group through
the static setting.
Power Saving (PoE models)
The Power saving using the IEEE 802.3az, Energy-Efficient Ethernet to detect the
client idle and cable length automatically and provide the different power. It can
reduce the power consumption.
1.4. Specifications
•Supports up to 24 10/100/1000 Mbps Gigabit Ethernet ports and 4 SFP slots or 4
mini-GBIC/SFP slots
•IEEE 802.3af/at PoE compliant to simplify deployment and installation
•Supports PoE (GS-7620 and GS-7624) up to 30W per port with 330W total
power budget
•Automatically detects powered devices (PD) and power consumption levels
•IEEE 802.1Q VLAN allows network segmentation to enhance performance and
security
•Supports Access Control List (ACL)
•Switch capacity: GS-7624 & GS-7424: 56 Gbps; GS-7620: 40 Gbps,
Forwarding rate: 35.7 Mbps
•Supports IGMP Snooping V1 / V2 / partial V3
•8K MAC address table and 9K jumbo frames
•19-inch rack-mountable metal case

Introduction
4
1.5. Front and Back Panel Configuration
The following figures illustrate the front and back panels of the Smart Lite Gigabit
switch series.
1.5.1. Ports
1 2
GS-7424
24-Port Gigabit Ethernet Smart-Lite Switch
[24 Gigabit Ports + 4 SFP]
Reset
SYS
PWR
10/100M 1000M
1 3 5 7 9 11 13 15 17 19 21 23
2 4 6 8 10 12 14 16 18 20 22 24
1 3 5 7
2 4 6 8
9 11 13 15
10 12 14 16
17 19 21 23
18 20 22 24
25
26
27
28
25 26 27 28
Figure 1 - GS-7424 Front Panel View
No.
Name
Description
1
RJ-45 LNK/ACT
Port 1~24
Port 1 to Port 24 function as an Ethernet connection
(10/100/1000 Mbps). Each has a corresponding
10/100/1000 Mbps LED.
2
SFP LNK/ACT
Port 25~28
Ports 25 to 28 function as fiber connections. Each has a
corresponding 1000Mbps LED.
1 2
100/100M PoE
1 2 3 4 5 6 7 8 9 10 19 20
Figure 2 - GS-7620 Front Panel View
No.
Name
Description
1
RJ-45 LNK/ACT
Port 1~20
Port 1 to Port 24 function as an Ethernet connection
(10/100/1000 Mbps) and PoE connection. Each has a
corresponding 10/100/1000 Mbps LED.
2
SFP LNK/ACT Port
21~24
Designed to install SFP modules and connect to network
devices with a bandwidth of 1000Mbps. Each has a
corresponding 1000Mbps LED.
GS-7620
20-Por t P oE Gi gabi t Ethernet Smart-Lite Switch
[16 PoE Ports + 4 Combo Gigabit Ports]
10 12 14 16
9 1 1 13 15
1 3 5 7
SYS
Reset
2 4 6 8

Introduction
5
GS-7624
24-Por t PoE Gi gabi t Ethernet
Sma rt-Lite Sw itch
[24 PoE Ports + 4 SFP]
1 2
Figure 3 - GS-7624 Front Panel View
No.
Name
Description
1
RJ-45 LNK/ACT
Port 1~24
Port 1 to Port 24 function as an Ethernet connection
(10/100/1000 Mbps) and PoE connection. Each has a
corresponding 10/100/1000 Mbps LED.
2
SFP LNK/ACT
Port 25~28
Ports 25 to 28 function as fiber connections. Each has a
corresponding 1000Mbps LED.
1
Figure 4 - GS-7424, GS-7620, and GS-7624 Back Panel View
No.
Name
Description
1
AC power inlet
100~240V/AC, 50/60Hz

Introduction
6
GS-7424
24-Por t G iga bit Ethernet Smar t-Lite Switch
[24 Gigabit Ports + 4 SFP]
Reset
SYS 1 3 5 7 9 11 13 15 17 1 9 21 23
2 4 6 8 1 0 12 1 4 16 1 8 20 22 24
PWR
25
26
27
28
1.5.2. LED Indicators
1 2 3 4
Figure 5 - GS-7424 Front Panel LED Indicators
No.
LED
Description
1
PWR
•Off: power off
•On: power on
2
SYS
•Off: system not ready
•On: system ready
•Blinking: system boot-up
3
RJ-45 LNK/ACT
Port 1~24
Bi-color LED:
•Off: port disconnected or link fail
•Green On/Blinking: 1000 Mbs connected/data
transmitting
•Amber On/Blinking: 10/100 Mbs connected/data
transmitting
4
SFP LNK/ACT
Port 25~28
•Off: port disconnected or link fail
•Green On/Blinking: 1000 Mbs connected/data
transmitting

Introduction
7
Reset SYS
1 3 5 7
2 4 6 8
10 12 14 16
9 1 1 13 15
GS-7620
20-Por t P oE Gi gabi t Ethernet Sm art-Lite Switch
[16 PoE Ports + 4 Combo Gigabit Ports]
1 2 3 4 5
Figure 6 - GS-7620 Front Panel LED Indicators
No.
Name
Description
1
SYS
•Off: power off or fail
•Green On: power on
•Green Blinking: system boot-up
2
PoE/Max
•Off: PoE power output under 320W PoE power budget
•Green On: PoE power output over 320W PoE power
budget
3
Port LED (PoE)
•Off: PoE power output off
•Green On: PoE power output on
4
Port LED
(LINK/ACT)
Bi-color LED:
•Off: port disconnected or link fail
•Green On/Blinking: 1000 Mbs connected/data
transmitting
•Amber On/Blinking: 10/100 Mbs connected/data
transmitting
5
SFP
•Off: port disconnected or link fail
•Green On/Blinking: 1000 Mbs connected/data
transmitting

Introduction
8
GS-7624
24-Por t PoE Gi gabi t Ethernet
Sma rt-Lite Sw itch
[24 PoE Ports + 4 SFP]
1 2 3 4 5
Figure 7 - GS-7624 Front Panel LED Indicators
No.
Name
Description
1
PWR
•Off: power off
•On: power on
2
SYS
•Off: system not ready
•On: system ready
•Blinking: system boot-up
3
Port LED (PoE)
•Off: PoE power output off
•Green On: PoE power output on
4
Copper port LED:
per port 2 LEDs,
on RJ45 phone
jack
•Off: port disconnected or link fail
•Green On (right side): 1000 Mbs connected
•Yellow On (left side): 10/100 Mbs connected
•Blinking: sending or receiving data
5
SFP
•Off: port disconnected or link fail
•Green On/Blinking: 1000 Mbs connected/data
transmitting

Installation
9
2. Installation
This chapter describes how to install and connect your Comtrend Switch. Read the
following topics and perform the procedures in the correct order. Incorrect installation
may cause damage to the product.
2.1. Mounting the Switch
There are two ways to physically set up the switch.
•Place the switch on a flat surface. To place the switch on a desktop, install the
four rubber feet (included) on the bottom of the switch.
•Mount the switch in a standard rack (1 rack unit high).
2.1.1. Placement Tips
•Ambient Temperature—To prevent the switch from overheating, do not operate it
in an area that exceeds an ambient temperature of 122°F (50°C).
•Air Flow—Be sure that there is adequate air flow around the switch.
•Mechanical Loading—Be sure that the switch is level and stable to avoid any
hazardous conditions.
•Circuit Overloading—Adding the switch to the power outlet must not overload
that circuit.
Follow these guidelines to install the switch securely.
•Put the switch in a stable place such as a desktop to prevent it from falling.
•Ensure the switch works in the proper AC input range and matches the voltage
labeled.
•Ensure there is proper heat dissipation from and adequate ventilation around the
switch.
•Ensure the switch’s location can support the weight of the switch and its
accessories.
Figure 8 - Installing Rubber Feet

Installation
10
2.1.2. Rack Mounting
You can mount the switch in any standard sized 19-inch (482.6 mm) wide rack. The
switch requires 1 rack unit (RU) of space, which is 1.75 inches (44.45 mm) high.
For stability, load the rack from the bottom to the top, with the heaviest
devices on the bottom. A top-heavy rack is likely to be unstable and may tip
over.
When mounting smaller switch products into a standard 19-inch rack, a pair of
extension brackets, sometimes referred to as ears, are needed to adapt the switch to
the rack size.
These extension brackets are mounted on the switch using the screws provided in the
kit, and have two holes that are used to then screw the switch into the rack.
An example of one type of these extension brackets is shown in the following figure.
A common problem that occurs during rack mounting is the distance between the
screw holes on the rack. Some racks are made with a uniform distance between all of
the holes, and others have the holes organized into groups, see Figure 10 for further
information.
When organized into groups, the switch must be placed in the rack so that the holes
in the extension brackets line up correctly.
1. Align the mounting brackets with the mounting holes on the switch’s side panels
and secure the brackets with the screws provided.
Figure 9 - Bracket Installation

Installation
11
2. Secure the switch on the equipment rack with the screws provided.
Figure 10 - Rack Installation

Getting Started
12
3. Getting Started
This section provides an introduction to the web-based configuration utility, and
covers the following topics:
•Powering on the device
•Connecting to the network
•Power over Ethernet (PoE) considerations
•Starting the web-based configuration utility
3.1. Power
3.1.1. Connecting to Power
Power down and disconnect the power cord before servicing or wiring a
switch.
Do not disconnect modules or cabling unless the power is first switched off.
The device only supports the voltage outlined in the type plate. Do not use
any other power components except those specifically designated for the
switch.
Disconnect the power cord before installation or cable wiring.
The switch is powered by an AC 100-240 V 50/60Hz internal high-performance power
supply. It is recommended to connect the switch with a single-phase three-wire power
source with a neutral outlet, or a multifunctional computer professional source.
Connect the AC power connector on the back panel of the switch to the external
power source with the included power cord. The switch boots up and the power LED
lights indicating that the switch is powered on.
Figure 11 - Power Socket Location, Rear View

Getting Started
13
3.1.2. Connecting to the Network
To connect the switch to the network:
1. Connect an Ethernet cable to the Ethernet port of a computer.
2. Connect the other end of the Ethernet cable to one of the numbered Ethernet
ports of the switch. If activity is present on the port, the LED lights up.
3. Repeat for any remaining cable connections.
We strongly recommend using a CAT-5E or better cable to connect network
devices. When connecting network devices, do not exceed the maximum
cabling distance of 100 meters (328 feet). It can take up to one minute for
attached devices or the LAN to be operational after it is connected. This is
normal behavior.
4. Connect the switch to end nodes using a standard Cat 5/5e Ethernet cable (UTP/
STP), see the following figure.
Switch ports automatically adjust to the connected device’s characteristics (MDI/
MDI-X, speed, duplex).
Figure 12 - Connecting to an End Node
3.1.3. Power over Ethernet (PoE) Considerations
For PoE switch models, consider the following information:
Devices considered a Power Sourcing Equipment (PSE), can support up to 30 Watts
per PoE port.
Model
Power Dedicated to PoE
PoE Ports
PoE Standard Supported
GS-7620
330W
1 to 16
IEEE802.3at/af
GS-7624
330W
1 to 24
IEEE802.3at/af

Getting Started
14
Ports 1-24 provide PoE power supply functionality with a maximum output power up
to 30W each port. This can supply power to PDs such as Internet phones, network
cameras, wireless access points. Connect the switch PoE port directly to the PD port
using a network cable.
When connecting switches capable of supplying PoE, consider the following
information:
•Switch models with PoE function are PSEs. These models are capable of
supplying DC power to attached PDs, such as VoIP phones, IP cameras,
and wireless access points (APs). Additionally, PoE switches are capable of
detecting and supplying power to pre-standard legacy PoE Power Devices.
Due to the support for legacy PoE, there is a possibility that PoE switches
acting as a PSE may inadvertently detect and supply power an attached
PSE, including other PoE switches. This false detection may result in a PoE
switch operating improperly and unable to supply power to attached PDs.
•The prevention of a false detection can be easily remedied by disabling
PoE on the ports that are used to connect PSEs. Another simple practice
to prevent a false detection is to first power up a PSE device before
connecting it to a PoE switch.
•When a device is falsely detected as a PD, disconnect the device from the
PoE port and power recycle the device with AC power before reconnecting
it to the PoE port.
3.1.4. Starting the Web-based Configuration Utility
This section describes how to navigate the web-based switch configuration utility.
It is recommended to disable the pop-up blocker.
Browser Restrictions
•If you are using older versions of the Microsoft® Internet Explorer (IE), you
cannot directly use an IPv6 address to access the device. You can, however, use
the DNS (Domain Name System) server to create a domain name that contains
the IPv6 address, and then use that domain name in the address bar in place of
the IPv6 address.
•If you have multiple IPv6 interfaces on your management station, use the IPv6
global address instead of the IPv6 link local address to access the device from
your browser.

Getting Started
15
Launching the Configuration Utility
To open the web-based configuration utility:
1. Open a Web browser.
2. Enter the IP address of the device you are configuring in the address bar on the
browser (factory default IP address is 192.168.169.1) and then press Enter.
Your computer’s IP address must be in the same subnet as the switch.
For example, if the switch is using the factory default IP address
(192.168.169.1.), your computer’s IP address can be in the following range:
192.168.169.x (whereas x is a number from 2 to 254).
Switch settings (default): 192.168.169.1.
Connected device: 192.168.1.169.x (whereas x is a number from 2 to
254)
After a successful connection, the login window displays.
Figure 13 - Login Window