Ntron 7018 Installation and operating instructions

(Revised 8/3/2009) Page 1 of 138
7018 Series
Managed Industrial
Ethernet Switch
User Manual &
Installation
Guide

(Revised 8/3/2009) Page 2 of 138
7018TX, 7018FX2, and 7018FXE2 Industrial Ethernet Switch Installation Guide.....................................................4
SAFETY WARNINGS................................................................................................................................................6
Installation....................................................................................................................................................................7
Connecting the Unit ................................................................................................................................................... 12
Overview of Advanced Features................................................................................................................................16
Mode of Operation..................................................................................................................................................................16
Port Mirroring .........................................................................................................................................................................16
Port Trunking..........................................................................................................................................................................16
Priority Tagging (QoS)............................................................................................................................................................16
Virtual LAN ............................................................................................................................................................................17
Rapid Spanning Tree Protocol ................................................................................................................................................17
SNMP Traps............................................................................................................................................................................17
IGMP Snooping ......................................................................................................................................................................17
N-Ring.....................................................................................................................................................................................18
N-Link.....................................................................................................................................................................................18
DHCP......................................................................................................................................................................................19
DHCP Client ...........................................................................................................................................................................19
DHCP Relay Agent.................................................................................................................................................................19
DHCP Server...........................................................................................................................................................................19
Web Software Configuration ..................................................................................................................................... 21
Web Management ...................................................................................................................................................................21
Web Management - Home ......................................................................................................................................................22
Administration – System.........................................................................................................................................................24
Administration – SNMP..........................................................................................................................................................26
Administration – Fault ............................................................................................................................................................28
DHCP – Server – Setup Profiles .............................................................................................................................................29
DHCP – Server – Setup IP Maps ............................................................................................................................................31
DHCP – Server – View Bindings............................................................................................................................................36
DHCP – Relay & Local IP - Setup..........................................................................................................................................37
Ports – Configuration ..............................................................................................................................................................40
Ports – Mirroring.....................................................................................................................................................................43
Ports – Trunking......................................................................................................................................................................45
Statistics – Port Statistics ........................................................................................................................................................46
Statistics – Port Utilization......................................................................................................................................................47
VLAN – Configuration ...........................................................................................................................................................48
Bridging – Aging Time ...........................................................................................................................................................50
Bridging – Unicast Addresses.................................................................................................................................................51
Bridging – Multicast Addresses..............................................................................................................................................53
Bridging – Show MAC by Port...............................................................................................................................................55
RSTP – Configuration.............................................................................................................................................................57
IGMP – Configuration ............................................................................................................................................................61
IGMP – Show Group and Show Router..................................................................................................................................64
IGMP – RFilter .......................................................................................................................................................................65
N-View – Configuration..........................................................................................................................................................67
N-View – Ports........................................................................................................................................................................68
N-Ring – Configuration ..........................................................................................................................................................70
N-Ring – Advanced Configuration .........................................................................................................................................73
N-Ring – Status.......................................................................................................................................................................75
N-Link – Configuration...........................................................................................................................................................79
N-Link – Status .......................................................................................................................................................................83
Firmware/Config – TFTP........................................................................................................................................................88
Support – Web Site and E-mail...............................................................................................................................................90
BPCL – Broadcast Packet Count Limit Configuration ...........................................................................................................91
User Management – Adding Users .........................................................................................................................................93
User Management – Removing Users.....................................................................................................................................94
LogicalView............................................................................................................................................................................95
Configuration – Save or Reset.................................................................................................................................................96
Help.........................................................................................................................................................................................97
Help – Administration.............................................................................................................................................................98

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Help – DHCP ..........................................................................................................................................................................99
Help – Ports...........................................................................................................................................................................100
Help – Statistics.....................................................................................................................................................................101
Help – VLAN........................................................................................................................................................................102
Help – BPCL.........................................................................................................................................................................103
Help – IGMP.........................................................................................................................................................................104
Help – Bridging.....................................................................................................................................................................105
Help – RSTP .........................................................................................................................................................................106
Help – Firmware/Config .......................................................................................................................................................107
Help – User Management......................................................................................................................................................108
Help – N-View......................................................................................................................................................................109
Help – N-Ring.......................................................................................................................................................................110
Help – N-Link .......................................................................................................................................................................111
Help – Other..........................................................................................................................................................................112
CLI Commands........................................................................................................................................................ 113
“?” (Help)..............................................................................................................................................................................113
Logout...................................................................................................................................................................................113
Show, Add, or Delete ARL Entries.......................................................................................................................................114
Save or Reset the Configuration Settings..............................................................................................................................115
Show or Set IGMP Configuration.........................................................................................................................................115
Show or Set Mirror Configuration ........................................................................................................................................116
Show or Set N-Ring Configuration.......................................................................................................................................117
Show or Set N-View Configuration......................................................................................................................................117
Ping a Host............................................................................................................................................................................118
Show or Set Port Configuration ............................................................................................................................................119
Reset the Switch....................................................................................................................................................................119
Show or Set SNMP Configuration........................................................................................................................................120
Show or Clear the Last System Error....................................................................................................................................120
Show System Information.....................................................................................................................................................121
Set or Show the System IP Configuration.............................................................................................................................122
Show or Set System Configuration.......................................................................................................................................123
VLAN Addition and Deletion Example...................................................................................................................124
VLAN Configuration Examples ..............................................................................................................................130
Example 1 – Basic understanding of port-based VLANs......................................................................................................130
Example 2 – Basic understanding of tagged VLANs (Admit – Tagged Only) .....................................................................131
Example 3 – Basic understanding of tagged VLANs (Admit – All).....................................................................................132
Example 4 – Basic understanding of Hybrid VLANs ...........................................................................................................133
Example 5 – Basic understanding of Overlapping VLANs...................................................................................................134
Example 6 – Basic understanding of VLANs with Multicast Filtering.................................................................................135
KEY SPECIFICATION...........................................................................................................................................136
N-TRON Limited Warranty.....................................................................................................................................138

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7018TX, 7018FX2, and 7018FXE2 Industrial Ethernet Switch Installation Guide
The N-TRON 7018 Series Industrial Ethernet Switch offers outstanding performance and ease of use. It is
ideally suited for connecting Ethernet enabled industrial and or security equipment and is a fully managed
switch.
PRODUCT FEATURES
• Full IEEE 802.3 Compliance
• Fourteen 10/100 BaseTX RJ-45 Ports
• Sixteen 10/100 BaseTX RJ-45 Ports (7018TX model
only)
• Two Optional Gigabit ports:
o1000BaseSX/LX Ports, LC style, and/or
o1000BaseT Ports, RJ45 style
• Two Optional 100BaseFX(E) Ports (7018FX2 and
7018FXE2 models only)
• Extended Environmental Specifications
• Auto Sensing 10/100BaseTX, Duplex, and MDIX
• Offers Rapid Spanning Tree Protocol
• Trunk with other N-Tron trunking capable switches
over two ports
• Store & Forward Technology
• Plug and Play IGMP Support
• Rugged Din-Rail Enclosure
• Redundant Power Inputs (10-30 VDC)
o–HV High Voltage Option (40-160VDC)
• SNMP v1, v2 and v3.
• Web Browser Management with detailed ring map and
fault location charting.
• Web Browsing and N-View Switch Monitoring
PRODUCT CONFIGURATIONS
• 7018TX-VV
– Sixteen 10/100 Base-TX RJ45 Copper Ports, and two
optional SFP transceivers
• 7018FX2-XX-VV
– Fourteen 10/100 Base-TX RJ45 Copper Ports,
two multimode 100BaseFX Ports, and two optional SFP
transceivers
• 7018FXE2-XX-YY-VV
– Fourteen 10/100 Base-TX RJ45 Copper Ports, two
singlemode 100BaseFX Ports and two optional SFP
transceivers
Where: XX = ST or SC
YY = 10, 40 or 80 for Singlemode, Blank for Multimode
E = Singlemode, Blank Otherwise
VV = HV for High voltage, Blank for Standard voltage
MANAGEMENT FEATURES
• IGMP Snooping
• VLAN
• QoS
• Port Trunking
• Port Mirroring
• 802.1D-2004 Rapid Spanning Tree
• N-RING™ (N-Tron proprietary Ring Management)
• N-LINK™ (N-Tron proprietary Coupling Management)
• DHCP Server, Option 82 relay

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Copyright, © N-Tron Corp., 2008-2009
820 S. University Blvd., Suite 4E
Mobile, AL 36609 USA
All rights reserved. Reproduction, adaptation, or translation without prior written permission from N-Tron
Corp. is prohibited, except as allowed under copyright laws.
Ethernet is a registered trademark of Xerox Corporation. All other product names, company names, logos
or other designations mentioned herein are trademarks of their respective owners.
The information contained in this document is subject to change without notice. N-Tron Corp. makes no
warranty of any kind with regard to this material, including, but not limited to, the implied warranties of
merchantability or fitness for a particular purpose. In no event shall N-Tron Corp. be liable for any
incidental, special, indirect, or consequential damages whatsoever included but not limited to lost profits
arising out of errors or omissions in this manual or the information contained herein.
Warning
Do not perform any services on the unit unless qualified to do so. Do not substitute unauthorized parts or
make unauthorized modifications to the unit.
Do not operate the unit with the top cover removed, as this could create a shock or fire hazard.
Do not block the air vents on the sides or the top of the unit.
Do not operate the equipment in the presence of flammable gasses or fumes. Operating electrical equipment
in such an environment constitutes a definite safety hazard.
Do not operate the equipment in a manner not specified by this manual.

(Revised 8/3/2009) Page 6 of 138
SAFETY WARNINGS
GENERAL SAFETY WARNINGS
WARNING: If the equipment is used in the manner not specified by N-Tron Corp., the protection
provided by the equipment may be impaired.
LASER SAFETY (7018FXE2 Models -40, -80 and optional NTSFP-LX -40 and -70)
CAUTION: CLASS 1 LASER PRODUCT. Do not stare into the laser!
Contact Information
N-Tron Corp.
820 South University Blvd. Suite 4E
Mobile, AL 36609
TEL: [phone]
FAX: [phone]
WEBSITE: www.n-tron.com
E-MAIL: [email protected]
ENVIRONMENTAL SAFETY
WARNING: Disconnect the power and allow to cool 5 minutes before touching.
ELECTRICAL SAFETY
Must be used with Listed UL Industrial Power Supply.
WARNING: Disconnect the power cable before removing the top cover.
WARNING: Do not operate the unit with the any cover removed.
WARNING: Do not work on equipment or cables during periods of lightning activity.
WARNING: Do not perform any services on the unit unless qualified to do so.
WARNING: Do not block the air vents.
WARNING: Observe proper DC Voltage polarity when installing power input cables. Reversing voltage
polarity can cause permanent damage to the unit and void the warranty.

(Revised 8/3/2009) Page 7 of 138
Hazardous Location Installation Requirements
1. This equipment is suitable for use in Class I, Div. 2, Groups A, B, C, D or non-hazardous locations
only.
2. WARNING: Explosion Hazard – Substitution of components may impair suitability for Class I,
Div. 2.
3. WARNING: Explosion Hazard - do not disconnect while circuit is live, unless area is known to be
non-hazardous.
4. WARNING: Explosion Hazard – do not replace the device unless power has been switched off or
the area is known to be non-hazardous.
5. Use 90°C or higher rated Copper wire, (0.22Nm) 2lb/in Tightening torque for field installed
conductors.
Please make sure the 7018 Series Ethernet Switch package contains the following items:
1. 7018 Series Switch
2. Product CD
Contact your carrier if any items are damaged.
Installation
Read the following warning before beginning the installation:
WARNING
Never install or work on electrical equipment or cabling during periods of lightning activity. Never connect
or disconnect power when hazardous gasses are present.
Disconnect the power cable before removing any enclosure panel.
UNPACKING
Remove all the equipment from the packaging, and store the packaging in a safe place. File any damage
claims with the carrier.
CLEANING
Clean only with a damp cloth.

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DIN RAIL MOUNTING
Install the unit on a standard 35mm Din-Rail. Recess the 7018TX unit to allow at least 3” of horizontal
clearance for copper cable bend radius. Recess the 7018FX2 unit to allow at least 5” of horizontal clearance
for fiber cable bend radius. There should be at least 4” of clearance on both the top and bottom of the unit
to allow proper ventilation.
To mount the unit to the 35mm din-rail, place top
edge of the bracket on the back of the unit against
the din-rail at an upward angle. Lower the bottom
of the unit until it snaps into place.
Note: When mounting the switch in the vertical
position, you must orientate the power connector
to the top as shown above for proper ventilation.
To remove the unit from the 35mm din-rail, place a flat
head screwdriver into the release clip at the bottom of
the unit, and push down on the clip until it disengages
from the bottom of the unit from the din-rail. Lift the
bottom of the unit up at an approximate 45° upward
angle to completely remove the unit.

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Most N-
Tron™ products are
designed to be mounted on industry
standard 35mm DIN-Rail. However,
DIN-
Rail mounting may not be
suitable for all applications. Our
Universal Rack Mount Kit (P/N:
URMK)
may be used to mount the
7018 Series to standard 19" racks as
an option.

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FRONT PANEL
From Top to Left:
Gigabit Ports 1000 Base SFP Copper or Fiber Transceivers (Optional)
RJ45 Ports Auto Sensing 10/100 Base-TX Connections
Fiber Ports 100 Base-FX Connections (only on 7018FX2 model)
LED lights when Power is supplied to the unit
NOTE: The RJ45 data port has two LEDs located on each connector. The left LED indicates LINK status,
and the right LED indicates ACTIVITY.
LEDs: The table below describes the operating modes:
LED
Color
Description
GREEN Power is ON
RED Power is ON and a fault condition exists
OFF Power is OFF
LNK GREEN 10/100/1000Mb Link between ports
OFF No Link between ports
ACT GREEN Data is active between ports
OFF Data is inactive between ports

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APPLYING POWER (Side View)
•Unscrew & Remove the DC Voltage Input
Plug from the Power Input Header
•Install the DC Power Cables into the Plug
(observing polarity).
•Plug the Voltage Input Plug back into the
Power Input Header.
•Tightening torque for the terminal block
power plug is 0.5 Nm/0.368 Pound Foot.
•Verify the Power LED stays ON (GREEN).
Notes:
•Only 1 power supply must be connected to power for minimal operation. For redundant power
operation, V1and V2inputs must be connected to separate DC Voltage sources. This device will
draw current from both sources simultaneously. Use 16-28 gauge wire when connecting to the
power supply.
•The Fault pins on the power connector can be used for an alarm contact. The current carrying
capacity is 1A at 24VDC. It is normally open and the relay closes when a fault condition occurs.
These pins can be used to connect an external warning device such as a light in order to provide an
external alarm. The conditions for generating a fault condition (closing the relay) can be configured
through software.
Recommended 24V DC Power Supplies, similar to: N-Tron’s P/N NTPS-24-1.3 (NOTE: Not appropriate
for use with M12, POE, and HV models.):
•Input AC 115/230V
•Output DC 24-28V
•Output Current 1.3A @ 24V
1.0A @ 28V
•Power 72W
•35 mm DIN-Rail Mountable
•Dimensions: 45X75X91 mm

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Connecting the Unit
For FX/FXE units, remove the dust cap from the fiber optic connectors and connect the fiber optic cables.
The TX port on the FX/FXE models should be connected to the RX port of the far end station. The RX port
on the FX/FXE versions should be connected to the TX port of the far end station.
For 10/100 Base-TX ports, plug a Category 5E twisted pair cable into the RJ45 connector. Connect the
other end to the far end station. Verify that the LNK LEDs are ON once the connection has been completed.
To connect any port to another device (end node, Switch or Repeater), use a standard Category 5E straight
through or crossover cable with a
minimum length of one meter and a
maximum length of 100 meters.
N-Tron recommends the use of pre-
manufactured Cat5E cables to ensure the
best performance. If this is not an option
and users must terminate their own ends
on the Cat5E cables; one of the two color
coded standards shown to the right should
be utilized. If a user does not follow one
of these two color code standards then the
performance and maximum cable distance
will be reduced significantly, and may
prevent the switch from establishing a
link.
Warning: Creating a port to port connection on the same switch (i.e. loop) is an illegal operation and
will create a broadcast storm which will crash the network!

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N-TRON SWITCH GROUNDING TECHNIQUES
The grounding philosophy of any control system is an integral part of the design. N-Tron switches are
designed to be grounded, but the user has been given the flexibility to float the switch when required. The
best noise immunity and emissions (i.e. CE) are obtained when the N-Tron switch chassis is connected to
earth ground via a drain wire. Some N-Tron switches have metal din-rail brackets that can ground the
switch if the din-rail is grounded. In some cases, N-Tron switches with metal brackets can be supplied with
optional plastic brackets if isolation is required.
Both V- legs of the power input connector are connected
to chassis internally on the PCB. Connecting a drain wire
to earth ground from one of the V- terminal plugs as
shown here will ground the switch and the chassis. The
power leads from the power source should be limited to 3
meters or less in length.
As an alternate, users can run a drain wire & lug from any of the
Din-Rail screws or empty PEM nuts on the enclosure. When
using an unused PEM nut to connect a ground lug via a machine
screw, care should be taken to limit the penetration of the outer
skin by less than 1/4 in. Failure to do so may cause irreversible
damage to the internal components of the switch.
Note: Before applying power to the grounded switch, you must
use a volt meter to verify there is no voltage difference between
the power supply’s negative output terminal and the switch
chassis grounding point.
If the use of shielded cables is required, it is generally recommended to only connect the shield at one end to
prevent ground loops and interfere with low level signals (i.e. thermocouples, RTD, etc.). Cat5e cables
manufactured to EIA-568A or 568B specifications are required for use with N-Tron Switches.
In the event all Cat5e patch cable distances are small (i.e. All Ethernet devices are located in the same local
cabinet and/or referenced to the same earth ground), it is permissible to use fully shielded cables terminated
to chassis ground at both ends in systems void of low level analog signals.

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RJ45 CONNECTOR CRIMP SPECIFICATIONS
Please reference the illustration below for your Cat5 cable specifications:

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SERIAL INTERFACE
The 7018 Series switches provide an EIA-232 interface accessed via a 9-pin female connector (labeled
‘COM’ on the unit). This is used to access the Command Line Interpreter (CLI). The pin-outs are shown
below:
Serial Cable
Connect the serial COM port of your PC and the 7018 Series Switch using a standard straight through serial
cable. You will require a cable with a 9-pin or 25-pin sub-D female connector for the PC end, and a 9-pin
male sub-D connector for the 7018 Series end.
The following table shows the pin-out and the connections for both types of cable:
PC Port 25-Pin 9-Pin 7018 series
Female Female 9-Pin Male
Signal Name
Pin #
Pin #
Pin #
Signal Name
TXD
2
3
3
RXD
RXD
3
2
2
TXD
GND
7
5
5
GND
Standard straight through serial cables are readily available from a variety of computer stores.
HyperTerminal
The following configuration should be used in HyperTerminal:
Port Settings: 115200
Data Bits: 8
Parity: NONE
Stop bits: 1
Flow Control: NONE

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Overview of Advanced Features
Mode of Operation
Each port on the switch can be configured into different modes of operation as shown below:
Copper Ports: 100Base Fiber Ports: 1000Base Copper/Fiber Ports:
- Half Duplex - Full Duplex - Full Duplex
- Full Duplex
- Auto Negotiation
Half Duplex
In half duplex mode, the CSMA/CD media access method is the means by which two or more stations share
a common transmission medium. To transmit, a station waits (defers) for a quiet period on the medium (that
is, no other station is transmitting) and then sends the intended message in bit-serial form. If, after initiating
a transmission, the message collides with that of another station, then each transmitting station intentionally
transmits for an additional predefined period to ensure propagation of the collision throughout the system.
The station remains silent for a random amount of time (back-off) before attempting to transmit again.
Full Duplex
Full duplex operation allows simultaneous communication between a pair of stations using point-to-point
media (dedicated channel). Full duplex operation does not require that transmitters defer, nor do they
monitor or react to receive activity, as there is no contention for a shared medium in this mode.
Auto Negotiation
In Auto Negotiation mode, the port / hardware detects the mode of operation of the station that is connected
to this port and sets its mode to match the mode of the station.
Port Mirroring
A Mirroring Port is a dedicated port that is configured to receive the copies of Ethernet frames that are being
transmitted out and also being received in from any other port that is being monitored.
Port Trunking
Port Trunking is the ability to group two network ports to increase the bandwidth between two machines
(switch or any work station). This feature allows grouping of high-speed connectivity and provides
redundant connection between switches, so that a trunk can act as a single link between the switches.
Priority Tagging (QoS)
IEEE 802.1p priority tagging is supported for two classes of services along with bandwidth support per
priority level. Transparent mode is supported through configuration wherein if the field is set, the tag bits
are ignored. The user can configure up to 8 different priority levels per port. Also priority overriding
(overriding the tagged field) can be enabled or disabled by the user.

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Virtual LAN
The switch provides support for setting up tagged Virtual LANs. A port may belong to any number of
Virtual LANs. The VLAN membership of a station is determined by the VLAN(s) that have been defined
for the port to which the station is connected. If a station should move from one port to another, it loses its
current VLAN membership and inherits that of the new port it is connected to.
A Default Virtual LAN exists to which a port, which is not a member of any other Virtual LAN, will
belong. This allows the switch to operate as a ‘normal’ Bridge when it is used in a network. A port is
automatically removed from the Default VLAN when it is reconfigured to belong to another Virtual LAN.
Using Tagged VLANs, the switch has the ability to take non-tagged packets in some ports, add a VLAN tag
to the packet and send it out tagged ports on the switch. The VLANs can also be configured to accept
tagged packets in tagged ports, strip the tags off the packets, and send the packets back out other untagged
ports. This allows a network administrator to set up the switch so he can support devices on the network
that do not support VLAN Tagged packets. The administrator can also set up the ports to discard any
packets that are tagged or to discard any packets that are untagged based on a hybrid VLAN of both tagged
and untagged ports, and using the VLAN Ingress Filter on the switch.
The 7018 Series switch also has the ability to allow overlapping VLANs. Overlapping VLANs give the
user the ability to have one or more ports share two or more VLAN groups. For more information and
examples on how this could be implemented, please see our website’s technical documents.
Rapid Spanning Tree Protocol
The Rapid Spanning Tree Protocol as specified in IEEE 802.1D-2004 is supported. One Spanning Tree per
non-overlapping VLAN is supported. The Rapid Spanning Tree Protocol (RSTP) supersedes the Spanning
Tree Protocol (STP) which was described in IEEE 802.1D-1998. The RSTP is used to configure a simply
connected active network topology from the arbitrarily connected bridges of a bridged network. Bridges
effectively connect just the LANs to which their forwarding ports are attached. Ports that are in a blocking
state do not forward frames. The bridges in the network exchange sufficient information to automatically
derive a spanning tree.
RSTP allows for much quicker learning of network topology changes than the older STP. RSTP supports
new and improved features such as rapid transition to forwarding state. RSTP also sends out new BPDUs
every hello time instead of just relaying them. RSTP interoperates with older STP switches by falling back
to the older STP when the older BPDUs are detected on bridge ports. The user can also manually configure
bridge ports to use the older STP when desired.
SNMP Traps
The 7018 Series switch supports up to 5 SNMP Trap Stations to which SNMP Traps will be sent. The
switch supports five standard traps; Link Up, Link Down, Cold Start, Warm Start and Authentication Errors.
SNMP Traps will be sent to all the trap stations configured on the switch when the corresponding trap is
enabled.
IGMP Snooping
IGMP Snooping is enabled by default, and the switch is Plug and Play for IGMP. IGMP snooping provides
intelligent network support for multicast applications. In particular, unneeded traffic is reduced. IGMP

(Revised 8/3/2009) Page 18 of 138
Snooping is configured via the web console and if enabled, operates dynamically upon each power up.
Also, there can be manual only or manual and dynamic operation. Note that “static multicast group
address” can be used whether IGMP Snooping is enabled or not.
IGMP Snooping will function dynamically without user intervention. If some of the devices in the LAN do
not understand IGMP, then manual settings are provided to accommodate them. The Internet Group
Management Protocol (IGMP) is a protocol that provides a way for a computer to report its multicast group
membership to adjacent ‘routers’. In this case N-Tron 7018 series switches provide router-like
functionality. Multicasting allows one computer to send content to multiple other computers that have
identified themselves as interested in receiving the originating computer's content. Multicasting can be used
to transmit only to an audience that has joined (and not left) a multicast group membership. IGMP version 2
is formally described in the Internet Engineering Task Force (IETF) Request for Comments (RFC) 2236.
IGMP version 1 is formally described in the Internet Engineering Task Force (IETF) Request for Comments
(RFC) 1112. The 7018 series supports v1 and v2.
N-Ring
N-Ring is enabled by default, and the switch is Plug and Play for N-Ring except that initially one must
enable an N-Ring enabled device to be the N-Ring Manager for a given N-Ring. Subsequently, N-Ring
operates dynamically upon each power up. Using N-Tron's proprietary N-Ring technology offers expanded
ring size capacity, detailed fault diagnostics, and a standard healing time of 30ms. The N-Ring Manager
periodically checks the health of the N-Ring via health check packets. If the N-Ring Manager stops
receiving the health check packets, it times out and converts the N-Ring to a backbone within 30ms. When
using all N-Ring enabled switches in the ring, a detailed ring map and fault location chart is also provided
on the N-Ring Manager’s web browser. N-Ring status is also sent from the N-Ring Manager to the N-View
OPC Server to identify the health status of the ring. Up to 250 N-Ring enabled switches can participate in
one N-Ring topology. Switches that do not have N-Ring capability may be used in an N-Ring, however the
ring map and fault location chart cannot be as detailed at these locations.
N-Link
The purpose of N-Link is to provide a way to redundantly couple an N-Ring topology to one or more other
topologies, usually other N-Ring topologies. Each N-Link configuration requires 4 switches: N-Link
Master, N-Link Slave, N-Link Primary Coupler, and N-Link Standby Coupler. N-Link will monitor the link
status of the Primary and Standby Coupler links. While the Primary Coupler link is healthy, it will forward
network traffic and the Standby Coupler link will block network traffic. When a problem is detected on the
Primary Coupler link, the Primary Coupler link will block network traffic and the Standby Coupler link will
forward network traffic. While the N-Link Master and Slave are in communication via the Control link,
only one Coupler link (Primary or Standby) will forward network traffic while the other Coupler link will
block network traffic.

(Revised 8/3/2009) Page 19 of 138
DHCP
For a DHCP overview, reference:
http://www.n-tron.com/pdf/DHCP_White_Paper.pdf
For detailed Engineering Instructions on DHCP, reference:
http://www.n-tron.com/pdf/DHCP_Technical_Instructions.pdf
DHCP Client
The switch will automatically obtain an IP assignment from a DHCP Server. Communication between the
client and server can optionally go through a DHCP Relay Agent.
DHCP Relay Agent
DHCP Relay Agent (Option 82) allows communication between the client and server to cross subnet and
VLAN boundries. It also allows for a device on a specific port to receive a specific IP address and if the
device is replaced, the replacement receives the same IP address as the original device.
DHCP Server
DHCP Server allows DHCP Client devices to automatically obtain an IP assignment. IP assignments can be
set up as a dynamic range of IP addresses available to any client device; or specific IP addresses based on
the clients MAC address, Client ID (Option 61), or Relay Agent connection (Option 82).

(Revised 8/3/2009) Page 20 of 138
TROUBLESHOOTING
1. Make sure the (Power LED) is ON.
2. Make sure you are supplying sufficient current for the version chosen. Note: The Inrush
current will exceed the steady state current by ~ 2X.
3. Verify that Link LEDs are ON for connected ports.
4. Verify cabling used between stations.
5. Verify that cabling is Category 5E or greater for 100Mbit operation.
SUPPORT
Contact N-Tron Corp. at:
TEL: [phone]
FAX: [phone]
E-MAIL: [email protected]
WEB: www.n-tron.com
FCC STATEMENT
This product complies with Part 15 of the FCC-A Rules.
Operation is subject to the following conditions:
(1) This device may not cause harmful Interference
(2) This device must accept any interference received, including interference that may cause
undesired operation.
NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. Operation of this device in a residential area is likely to cause
harmful interference in which case the user will be required to correct the interference at his/her own
expense.
INDUSTRY CANADA
This Class A digital apparatus meets all requirements of the Canadian Interference Causing Equipment
Regulations. Operation is subject to the following two conditions; (1) this device digital apparatus meets
all requirements of the Canadian Interference Causing Equipment Regulations. Operation is subject to
the following two conditions; (1) this device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may cause undesired operation.
Cet appareillage numérique de la classe A répond à toutes les exigences de l'interférence canadienne
causant des règlements d'équipement. L'opération est sujette aux deux conditions suivantes: (1) ce
dispositif peut ne pas causer l'interférence nocive, et (2) ce dispositif doit accepter n'importe quelle
interférence reçue, y compris l'interférence qui peut causer l'opération peu désirée.