VOLKTEK NSH-2926 User manual

NSH-2926/NSH-2916
16-port/ 24-port Managed Gigabit
Web Smart Switch
www.volktek.com

1NSH-2926/NSH-2916 user manual v1.0
COPYRIGHT
All rights reserved. No part of this publication may be reproduced, stored in a retrieval
system, or transmitted in any form or by any means, whether electronic, mechanical,
photo copying, recording or otherwise, without the prior written permission of the pub-
lisher.
FCC WARNING
This equipment has been tested and found to comply with the limits for a class A device,
pursuant to part 15 of FCC rules. These limits are designed to provide reasonable pro-
tection against harmful interference in a commercial installation. This equipment gene
rates, uses and can radiate radio frequency energy and, if not installed and used in ac-
cordance with the instructions, may cause harmful interference to radio communication.
Operation of this equipment in a residential area is likely to cause harmful interference,
in which case, the user will be required to correct the interference at the user’s own ex-
pense.
CE
This is a Class A product. In a domestic environment, this product may cause radio
interference in which case the user may be required to take adequate measures.
CAUTION
RISK OF EXPLOSION IF A BATTERY IS REPLACED BY AN INCORRECT TYPE. DISPOSE
OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS.
Take special care to read and understand all the content in the warning boxes:

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Table of Contents
About This Guide ..........................................................3
Purpose ...................................................................... 3
Terms / Usage ................................................................. 3
Features ..................................................................... 3
Specications ................................................................. 4
Performance .................................................................. 4
Hardware Description.......................................................6
Product Illustration.............................................................. 7
Connectors ................................................................... 8
Installation ...............................................................9
Desktop Installation ............................................................. 9
Mounting on a Rack ............................................................ 9
Getting Connected ............................................................. 9
Powering On the Unit ........................................................... 9
Installing the SFP modules and Fiber Cable (For NSH-2926 only)......................... 10
Connecting a Copper Cable ...................................................... 12
Connecting to Computers or a LAN ................................................ 12
Power On the Unit ............................................................. 12
LED Indicators ............................................................13
Management Options .......................................................14
Web-based Management Interface ................................................. 14
SNMP-based Management ....................................................... 14
Traps ........................................................................ 14
MIBs ........................................................................ 14
Web Management .........................................................15
Log into Web Management ....................................................... 15
Smart........................................................................ 15
Advanced .................................................................... 18
Bandwidth Management ......................................................... 23
Security ...................................................................... 29
Management .................................................................. 34

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About This Guide
Welcome
Congratulations on choosing the NSH-2926 24-port 10/100/1000Base-T + 2-port Gigabit SFP
(NSH-2916 16 x 10/100/1000Base-T ports) Web Smart Switch. The NSH-2926(NSH-2916) is a
high-performance Web-Smart switch that provides users with 24x10/100/1000Mbps Ethernet and
two Gigabit SFP slots (16 x 10/100/1000Base-T ports).The Web/SNMP management provides
remote control capability that provides flexible network management and monitoring options.
Whether managed via an "in-band" SNMP management station or an Internet Web browser, the NSH-
2926(NSH-2916) facilitates network operational control and diagnostics.
The management functions enable efficient network usage. VLAN reduces the collisions caused by
broadcasting. QoS secures the bandwidth for some bandwidth-hungry applications like VoIP and
video conferencing. The Switch also supports Port Mirroring that allows web manager to watch
abnormal traffic.
Purpose
This guide discusses how to install and configure your Web Smart Access Switch.
Terms/ Usage
In this guide, the term “Switch” (first letter upper case) refers to the NSH-2926(NSH-2916) Switch,
and “switch” (first letter lower case) refers to other switches.
Features
• NSH-2926 for 24-port 10/100/1000 T plus two fiber ports / NSH-2916 for 16-port 10/100/1000 T
• RSTP
• ARP Inspection
• IGMP Snooping (v1/2/3)
• IGMP Querier
• Loop Detection
• Port-based VLAN
• 802.1Q VLAN 256 Static Maximum
• VLAN trunking
• Guest VLAN
• 802.1x port authentication
• Static MAC forwarding
• Web authentication
• 802.1p QoS with 8 CoS per port
• Diffserv

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• Broadcast Storm Control
• Bandwidth Control
• Rate limitation
• 802.3 flow control
• Link aggregation (802.3ad)
• Port-based mirroring
• Web GUI management
• SNMP (v1/v2)
• EEE support
Specifications
Performance:
Throughput: 14,881 packets per second (pps) to 10 Mbps ports
148,809 pps to 100Mbps ports
1,488,095 pps to 1000Mbps ports
Address Table Size: 16K MAC entries
VLANs: Port-based
Tag-based (4096VLANs)
Link Aggregation: Up to eight aggregation groups
Max. Distance: UTP: 100 meters
Fiber: Based on Mini GBIC module
Management via: SNMP V1, V2C
Web Management
Connectors and Cabling:
Ports: NSH-2926
24 x 10/100/1000Mbps ports
2 x Gigabit fiber slots (SFP)
NSH-2916
16 x 10/100/1000Mbps ports
SNMP Standards & Protocols:
RFC 1157 Simple Network Management Protocol v2c
RFC 1213 MIB II
RFC 1493 Bridge MIB
RFC 1643 Ethernet MIB
RFC 1757 RMON Group 1, 2, 3, 9

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Network Management:
System Configuration: Telnet, Web browser, and SNMP/RMON
Management Agent: SNMP Support: MIB II, Bridge MIB, Ethernet MIB, and RMON MIB
RMON Groups: 1, 2, 3, and 9 (Statistics, History, Alarm and Event)
Spanning Tree Algorithm: IEEE 802.1D and 802.1w provide redundant link support
Port-based or 802.1Q VLANs: Up to 4096 VLANs, with GVRP for dynamic VLAN registration
Link Aggregation: 2~8 ports can be combined into a fat pipe
Standards and Compliance:
IEEE 802.3 10Base-T Ethernet
IEEE 802.3u 100Base-TX Ethernet
EEE 802.3ab 1000Base-T Ethernet
IEEE 802.3z 1000Base-SX/LX/LHX
IEEE 802.3 NWay Auto-negotiation
IEEE 802.3x Flow Control
IEEE 802.1D Spanning Tree protocol
IEEE 802.1w Rapid Spanning Tree protocol
IEEE 802.1p Class of Service, Priority protocols
IEEE 802.1Q VLAN Tagging
IEEE 802.1X Port Authentication
IEEE 802.1ad VLAN Stacking
IEEE 802.3ad LACP Aggregation
Power Characteristics:
Input voltage: 100 to 240V AC (auto-ranging) 50 to 60 Hz
Power Consumption: 20-Watts max.
Environmental Characteristics:
Operating Temperature: 0°C to 50°C
Relative Humidity: 10% to 80%, non-condensing
Storage Temperature: 0°C to 70°C
Humidity: 5% to 90% (non-condensing)
Dimensions:
44.5mm (H) x 440mm (W) x 173mm (D)
Weight:
2.3kg
Mounting:
Standard 19” Rack-mountable case
Electromagnetic Compatibility:
Emissions: FCC Class A, & CE approved

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Hardware Description
The NSH-2926(NSH-2916) is a high-performance managed SNMP Layer 2+ switch that provides
users with 24 x 10/100/1000Mbps Ethernet and two Gigabit Combo ports. The Web/SNMP
management provides remote control capability that gives user-friendly and flexible network
management and monitoring options.
For increased bandwidth applications, the NSH-2926(NSH-2916) can accommodate trunk groups
with eight ports in each trunk, up to eight trunking groups.
Moreover, these trunk ports ship with fair-over function to provide redundant backup if one or more
of the ports are malfunctioning. It also supports both Port-based VLAN and Tag-based VLAN, thereby
simplifying network traffic segmentation, broadcast domain extension and other associated benefits of
constructing VLANs. This abundance of features translates into increased efficiency and performance
in network administration.
Being SNMP-ready, the Switch enables network managers to remotely monitor the entire network status
quickly and easily via RJ-45 (in-band), or connection. This managed Switch can extend the enterprise
LAN configuration range up to 110km while simultaneously minimizing the troubleshooting time.
The Switch is designed for ‘plug-n-play’ to enable hassle-free integration in today’s managed mixed
cabling network configurations.
Featuring auto MDI/MDI-X detection for direct connections to a workstation, switch or hub, network
managers no longer need to worry about the cable configuration (crossover or straight through) when
establishing connections between RJ-45 ports.
The Switch has auto-negotiation capabilities that allow it to support connection with leading NWay
switches. In full-duplex mode, this unit can sustain distances of up to 550m (with multi-mode fiber)
and 110km (with long-haul single-mode fiber) between a LAN switch and another switch or data/file
server.

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Product Illustration
NSH-2926
Front View:
Back View
NSH-2916
Front View
Back View

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Connectors
The Switch NSH-2926 utilizes ports with copper and SFP fiber port connectors functioning under
Ethernet/Fast Ethernet/Gigabit Ethernet standards.
The Switch NSH-2916 utilizes ports with copper port connectors functioning under Ethernet/Fast
Ethernet/Gigabit Ethernet standards.
10/100/1000Base-T Ports
The 10/100/1000BASE-T ports support network speeds of either 10Mbps, 100Mbps, or 1000Mbps
and can operate in half- and full-duplex transfer modes. These ports also offer automatic MDI/MDI-X
crossover detection that gives true “plug-n-play” capability – just plug the network cables into the
ports and the ports will adjust according to the end-node devices. The following are recommended
cabling for the RJ-45 connectors: (1)10Mbps – Cat 3 or better; (2)100Mbps – Cat 5e or better; (3)
1000Mbps – Cat 5e or better.
SFP Slots for SFP modules (For NSH-2926 only)
The two SFP slots are designed to house Gigabit SFP modules that support network speeds of
1000Mbps.

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Installation
The location chosen for installing the Switch may greatly affect its performance. When selecting a site,
we recommend considering the following rules:
• Install the Switch in an appropriate place. See Technical Specifications for the acceptable
temperature and humidity ranges.
• Install the Switch in a location that is not affected by strong electromagnetic field generators (such
as motors), vibration, dust, and direct sunlight.
• Leave at least 10cm of space at the front and rear of the unit for ventilation.
• Affix the provided rubber pads to the bottom of the Switch to protect the case from scratching.
Desktop Installation
Follow the instructions listed below to install the Switch in a desktop location.
1. Locate the Switch in a clean, flat and safe position that has convenient access to AC power.
2. Affix the four self-adhesive rubber pads to the underside of the Switch.
3. Apply AC power to the Switch (The green PWR LED on the front panel should light up).
4. Connect cables from the network partner devices to the ports on the front panel (The green LNK
LED on the upper right of the port should light).
This Switch can also be mounted on a vertical surface. Simply use the underside of the unit as a
template to measure and mark out the position of the holes on to the surface where the unit is to be
installed. Then use the two screws provided to mount the Switch firmly in place.
Warning: Because invisible laser radiation may be emitted from the aperture of the
port when no cable is connected, avoid exposure to laser radiation and do not stare
into open apertures.
Mounting on a Rack
Attach brackets to each side of the switch and place the brackets in the rack’s slots.
Insert and tighten two screws to securely attach the bracket to the rack on each side.
Getting Connected
The Switch is capable of connecting up to 26 network devices employing a combination of twisted-
pair and fiber cabling paths at Ethernet, Fast Ethernet, or Gigabit Ethernet speeds.
Powering On the Unit
The Switch uses an AC power supply 100~240V AC, 50~60 Hz. The Switch’s power supply
automatically self-adjusts to the local power source and may be powered on without having any or all
LAN segment cables connected.

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1. Insert the power cable plug directly into the receptacle located at the back of the device.
2. Plug the power adapter into an available socket.
Note:For international use, you may need to change the AC power adapter cord. You must use a
power cord set that has been approved for the receptacle type and electrical current in your country.
3. Check the front-panel LEDs as the device is powered on to verify that the Power LED is lit. If not,
check that the power cable is correctly and securely plugged in.
Installing the SFP modules and Fiber Cable (For NSH-2926
only)
1. Slide the selected SFP module into the selected SFP slot. (Make sure the SFP module is aligned
correctly with the inside of the slot):
2. Remove any rubber plugs that may be present in the SFP module’s mouth.

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3. Align the fiber cable’s connector with the SFP module’s mouth and insert the connector:
4. Slide the connector in until a click is heard:
5. If you want to pull the connector out, first push down the release clip on top of the connector to
release the connector from the SFP module.
To properly connect fiber cabling: Check that the fiber terminators are clean. You can clean
the cable plugs by wiping them gently with a clean tissue or cotton ball moistened with a little ethanol.
Dirty fiber terminators on fiber optic cables will impair the quality of the light transmitted through the
cable and lead to degraded performance on the port.
Note: When inserting the cable, be sure the tab on the plug clicks into position to
ensure that it is properly seated.
Check the corresponding port LED on the Switch to be sure that the connection is valid. (Refer to the
LED chart)

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Connecting a Copper Cable
The 10/100/1000BASE-T RJ-45 Ethernet port fully supports auto-sensing and auto-negotiation.
Insert one end of a Category 3/4/5/5e (see recommendation above) type twisted-pair cable into an
available RJ-45 port on the Switch and the other end into the port of the network node.
Check the corresponding port LED on the Switch to ensure that the connection is valid. (Refer to LED
chart)
Connecting to Computers or a LAN
You can use Ethernet cable to connect computers directly to the switch ports. You can also connect
hubs/switches to the switch ports by Ethernet cables. You can use either the crossover or straight-
through Ethernet cable to connect computers, hubs, or switches.
Use a twisted-pair Category 5 Ethernet cable to connect the 1000BASE-T port, otherwise the link
speed will not be able to reach 1Gbps.
Power On the Unit
Connect the AC power cord to the POWER receptacle on the front of the Switch and plug the other
end of the power cord into a wall outlet or a power strip.
Check the front LED indicators with the description in the next chapter. If the LEDs light up as
described, the Switch’s hardware is working properly.

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LED Indicators
This Switch is equipped with Unit LEDs to enable you to determine the status of the Switch, as well as
Port LEDs to display what is happening in all your connections. They are as follows:
Unit LEDs
LED Condition Status
POST
Green On Self test passes or System is
ready
Flashing Switch is booting
Light Off Self test fails or no power
PWR Green On Primary power is normal
Light Off Primary power off or failure
SFP LEDs ( for NSH-2926 only)
LED Condition Status
Link/Act
(25th~26th Ports)
Green On The port is linked.
Flashing Data traffic transmitting
Light Off No valid link established on port
Copper Port LEDs
LED Condition Status
LNK/ACT
(1st~24th Ports)
Green On The port is linked.
Flashing Data traffic transmitting at
10/1000 Mbps
Amber on Data traffic transmitting at
100Mbps
Light Off No valid link established on port
FDX Amber on Full Duplex
Off Half Duplex

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Management Options
This system may be managed using web-based management, accessible through a Web browser. This
will allow a network administrator to quickly and efficiently set up a network for a small or medium
business with a minimum of hassle.
In order to aid discovery of the device on a network by a management PC, VOLKTEK includes a utility to
scan the network. The program, called auto_discovery.exe, is available on the CD which accompanies
the Switch. To use the program, first install it on a Windows XP/Vista/7 PC, then click to run.
The device discovery screen allows the user to search for a particular switch, or to leave the box blank
in order to scan the network for all switches. After clicking search, the program will list the switches
on the network fitting the model name entered (or all switches, if no model name was entered).
Once the list has been populated, the user can filter to narrow down the number of devices in the list
using the filter function.
When the correct switch had been located, double click anywhere on the table row containing the
desired switch to open the GUI in your web browser.
Web-based Management Interface
After you have successfully installed the Switch, you can configure the Switch, monitor the LED panel,
and display statistics graphically using a Web browser.
SNMP-based Management
You can manage the Switch with SNMP Manager software. The SNMP agent decodes the incoming
SNMP messages and responds to requests with MIB objects stored in the database. The SNMP agent
updates the MIB objects to generate statistics and counters.
Traps
Traps are messages that alert network personnel of events that occur on the Switch. The events can be
as serious as a reboot (someone accidentally turned OFF the Switch), or less serious like a port status
change. The Switch generates traps and sends them to the trap recipient (or network manager). Typical
traps include trap messages for Authentication Failure, Topology Change and Broadcast/Multicast
Storm.
MIBs
The Switch in the MIB stores management and counter information. It uses the standard MIB-II
Management Information Base module. Consequently, values for MIB objects can be retrieved from
any SNMP-based network management software. MIB values can be either read-only or read-and-
write.

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Web Management
The Web Configurator is a browser-based user-friendly interface to allow the network administrator
to alter the configuration of the switch. The Smart functions are presented on login, with advanced
options available through the Advanced tab.
Log into Web Management
From a PC, open your Web browser, type the following in the Web address (or location) box:
http://192.168.0.254 and then press <Enter>.
This is the factory default IP address for the switch. A login dialog is displayed:
Enter your user name and password, then click Login.
Use the following defaults the first time you log into the program:
Default User Name: admin
Default Password: admin
Smart
The Smart tab allows for simple settings, with many of the more advanced features set automatically
by the switch.

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IP Setting
This function allows the setting of the IP address and subnet mask used by the switch. Enter the
desired IP address and subnet mask in the input boxes, then click Apply to confirm.
EEE (Energy Efficient Ethernet Port)
The switch is equipped with Energy Efficient Ethernet to reduce energy consumption on Ethernet ports.
It is enabled by default.
To disable EEE on all ports, click the on/off button.
To disable EEE on a per-port basis, click the individual port to be disabled. A green light means EEE is
enabled, no light means it is disabled. Once the appropriate ports have been selected, click Apply.

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Web Authentication
Web authentication allows the admin to set a username and password for logins on a particular port.
This is usually employed one guest terminals or networks, for example in a company meeting room,
where guests can be allowed to connect to the internet, but not to the local network (which is thereby
kept secure). When a device using that port attempts to connect to the internet, the web browser will
request a username and password before allowing access.
Use the on/off button to enable or disable the function. Edit the username and password inputs, click
the ports on which web authentication will be enabled (green is enabled, black disabled), then click
Apply to save.
DHCP Snooping
DHCP snooping is a function which ensures IP integrity in the Layer 2 domain. It listens to network
traffic to make sure only authorized devices are accessing the network.
To turn the function for all ports on or off, click the on/off button. To allow a particular port to
connect with a DHCP server, click the port itself. A green light indicates the port is allowed to connect
with a DHCP server, no light means it cannot.

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STP (Spanning Tree Protocol)
Spanning Tree Protocol is a network protocol which prevents network loops (which in turn can cause
broadcast storm conditions, seriously downgrading network performance).
Click the on/off button to enable Spanning Tree Protocol.
Advanced
The advanced settings tab allows full access to the administrator settings for the switch.
System Status
The system status screen provides information on the current status of the switch.
Basic Settings
The basic settings for the switch are controlled from the Basic Settings option.

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General Settings
The System tab allows access to the General Settings window, which contains the following
information:
Hostname: Name of the Switch (user editable, no spaces allowed)
• DHCP Client: Options to enable or disable the DHCP client function of the Switch
• Static IP Address: The IP address of the Switch
• Subnet Mask: The subnet mask for the Switch network
• Default Gateway: The default IP gateway used by the Switch
• Management VLAN: The specific VLAN used for management of the Switch itself
SNTP
The SNTP tab is used for settings related to system time.
In Time and Date Setup the user can manually set the system time and date, or use an NTP client to
automatically set the system time and date (recommended).
If manual time and date is enabled, there is an option to set Daylight Savings to adjust the system time
on a predetermined date. Select the time adjustment required from the drop-down list, enter the start
and finish of the period of daylight savings, then click Apply to save these settings.