Ntron 708M12 Installation and operating instructions

(Revised 2012-10-5) Page 1 of 169
708M12 & 716M12
Managed Industrial
Ethernet Switch
User Manual &
Installation
Guide

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708M12 & 716M12 Industrial Ethernet Switch Installation Guide.............................................................................5
708M12 & 716M12 Industrial Ethernet Switch Accessories....................................................................................... 6
Safety Warnings...........................................................................................................................................................8
Ingress Protection IP67..............................................................................................................................................10
Installation..................................................................................................................................................................10
Bulkhead Mounting.................................................................................................................................................... 12
Front Panel.................................................................................................................................................................14
Applying Power .........................................................................................................................................................15
N-TRON 708M12 Grounding Techniques ................................................................................................................16
N-TRON 716M12 Grounding Techniques ................................................................................................................16
OVERVIEW OF ADVANCED FEATURES............................................................................................................ 18
Mode of Operation..................................................................................................................................................................18
Port Mirroring .........................................................................................................................................................................18
Port Trunking..........................................................................................................................................................................18
Quality of Service (QoS).........................................................................................................................................................18
Virtual LAN............................................................................................................................................................................19
Rapid Spanning Tree Protocol ................................................................................................................................................20
SNMP Traps............................................................................................................................................................................20
IGMP Snooping ......................................................................................................................................................................20
N-Ring.....................................................................................................................................................................................21
N-Link.....................................................................................................................................................................................21
CIP ..........................................................................................................................................................................................21
DHCP......................................................................................................................................................................................21
DHCP Client ...........................................................................................................................................................................22
DHCP Relay Agent.................................................................................................................................................................22
DHCP Server...........................................................................................................................................................................22
LLDP.......................................................................................................................................................................................22
Port Security—MAC Address Based......................................................................................................................................22
XML Settings Download ........................................................................................................................................................22
Rate Limiting ..........................................................................................................................................................................22
Web Software Configuration .....................................................................................................................................25
Web Management ...................................................................................................................................................................25
Web Management - Home ......................................................................................................................................................26
Administration – System.........................................................................................................................................................28
Administration – SNMP..........................................................................................................................................................32
Administration – Fault ............................................................................................................................................................34
DHCP – Server – Setup Profiles .............................................................................................................................................35
DHCP – Server – Setup IP Maps ............................................................................................................................................37
DHCP – Server – View Bindings............................................................................................................................................43
DHCP – Relay & Local IP - Setup..........................................................................................................................................44
LLDP - Configuration.............................................................................................................................................................46
LLDP - Ports...........................................................................................................................................................................47
LLDP - Status..........................................................................................................................................................................48
LLDP - Statistics.....................................................................................................................................................................49
Ports – Configuration..............................................................................................................................................................50
Ports – MAC Security – Learning...........................................................................................................................................52
Ports – MAC Security – Authorization List............................................................................................................................54
Ports – MAC Security – Intruder Log.....................................................................................................................................55
Ports – Mirroring.....................................................................................................................................................................56
Ports – Trunking......................................................................................................................................................................58
Ports – QOS ............................................................................................................................................................................59
Statistics – Port Statistics ........................................................................................................................................................61
Statistics – Port Utilization......................................................................................................................................................62
VLAN – Configuration ...........................................................................................................................................................63
Bridging – Aging Time...........................................................................................................................................................66
Bridging – Unicast Addresses.................................................................................................................................................67
Bridging – Multicast Addresses..............................................................................................................................................69
Bridging – Show MAC by Port...............................................................................................................................................71
RSTP – Configuration.............................................................................................................................................................73

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IGMP – Configuration ............................................................................................................................................................76
IGMP – RFilter .......................................................................................................................................................................82
N-View – Configuration..........................................................................................................................................................84
N-View – Ports........................................................................................................................................................................85
N-Ring – Configuration ..........................................................................................................................................................86
N-Ring – Advanced Configuration .........................................................................................................................................89
N-Ring – Status.......................................................................................................................................................................91
N-Link – Configuration...........................................................................................................................................................95
N-Link – Status.......................................................................................................................................................................99
CIP – Configuration..............................................................................................................................................................104
CIP – Status...........................................................................................................................................................................105
Firmware/Config – TFTP......................................................................................................................................................106
Support – Web Site and E-mail.............................................................................................................................................108
Rate Limiting Configuration.................................................................................................................................................109
User Management – Adding Users .......................................................................................................................................113
User Management – Removing Users...................................................................................................................................114
LogicalView..........................................................................................................................................................................115
Configuration – Save or Reset...............................................................................................................................................117
Help – Overview...................................................................................................................................................................118
Help – Administration...........................................................................................................................................................119
Help – DHCP ........................................................................................................................................................................120
Help – LLDP.........................................................................................................................................................................121
Help – Ports...........................................................................................................................................................................122
Help – Statistics.....................................................................................................................................................................123
Help – VLAN........................................................................................................................................................................124
Help – Bridging.....................................................................................................................................................................125
Help – RSTP .........................................................................................................................................................................126
Help – IGMP.........................................................................................................................................................................127
Help – N-View......................................................................................................................................................................128
Help – N-Ring.......................................................................................................................................................................129
Help – N-Link.......................................................................................................................................................................130
Help – CIP.............................................................................................................................................................................131
Help – Firmware/Config .......................................................................................................................................................132
Help – Rate Limiting.............................................................................................................................................................133
Help – User Management......................................................................................................................................................134
Help – Other..........................................................................................................................................................................135
CLI Commands........................................................................................................................................................136
“?” (Help)..............................................................................................................................................................................136
Logout...................................................................................................................................................................................136
Show, Add, or Delete ARL Entries.......................................................................................................................................137
Save or Reset the Configuration Settings..............................................................................................................................138
Configuration Device Operations..........................................................................................................................................139
Show or Set CIP Configuration.............................................................................................................................................140
Show or Set IGMP Configuration.........................................................................................................................................141
Show or Set Mirror Configuration ........................................................................................................................................142
Show or Set N-Ring Configuration.......................................................................................................................................143
Show or Set N-View Configuration......................................................................................................................................143
Ping a Host............................................................................................................................................................................144
Show or Set Port Configuration ............................................................................................................................................145
Reset the Switch....................................................................................................................................................................145
Show or Set SNMP Configuration........................................................................................................................................146
Show or Clear the Last System Error....................................................................................................................................146
Show System Information.....................................................................................................................................................147
Set or Show the System IP Configuration.............................................................................................................................148
Show or Set System Configuration .......................................................................................................................................149
VLAN Addition and Deletion Example...................................................................................................................150
VLAN Configuration Examples ..............................................................................................................................156
Example 1 – Basic understanding of port-based VLANs......................................................................................................156
Example 2 – Basic understanding of tagged VLANs (Admit – Tagged Only).....................................................................157
Example 3 – Basic understanding of tagged VLANs (Admit – All).....................................................................................158
Example 4 – Basic understanding of Hybrid VLANs...........................................................................................................159

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Example 5 – Basic understanding of Overlapping VLANs...................................................................................................160
Example 6 – Basic understanding of VLANs with Multicast Filtering.................................................................................161
KEY SPECIFICATION – 708M12 .........................................................................................................................162
KEY SPECIFICATION – 716M12 .........................................................................................................................164
Appendix A. XML Settings File Example..............................................................................................................166
N-TRON Limited Warranty.....................................................................................................................................169

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708M12 & 716M12 Industrial Ethernet Switch Installation Guide
The N-TRON 708M12 & 716M12 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
• Eight 10/100 BaseTX D Coded M12 Copper Ports
(708M12)
• Sixteen 10/100 BaseTX D Coded M12 Copper Ports
(716M12)
• Extended Environmental Specifications
• IP65 Rated for protection against low pressure jets of
water from any direction
• IP66 Rated for protection against high pressure jets of
water from any direction
• IP67 Rated for protection against temporary immersion
in water
• Autosensing 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) (708M12)
• Redundant Power Inputs (10-49 VDC) (716M12)
• Web Browser Management with detailed ring map and
fault location charting.
• Web Browsing and N-View Switch Monitoring
MANAGEMENT FEATURES
• SNMP v1, v2 and v3
• Configuration backup via Optional Configuration Device (NTCD)
• EtherNet/IP™ CIP Messaging
• IGMP Auto Configuration and Plug and Play Support
• 802.1Q tag VLAN and Port VLAN
• 802.1p QoS, Port QoS, and DSCP
• Trunk with other N-Tron trunking capable switches over two ports
• Mirroring
• N-RING™ (N-Tron proprietary Ring Management)
• N-LINK™ (N-Tron proprietary Coupling Management)
• 802.1d, 802.1w, 802.1D RSTP (Rapid Spanning Tree Protocol)
• DHCP Client, Server, Option 82 relay, Option 61
• Local Port IP Addressing
• Port Security—MAC Address Based
•802.1AB™-2005 Link Layer Discovery Protocol (LLDP)
•XML Settings Download for some configuration parameters.
• Broadcast and /or Mulitcast Rate Limiting.
High Voltage Models Only

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708M12 & 716M12 Industrial Ethernet Switch Accessories
700-NTCD-M12
Configuration Device
Ideal for saving, or restoring switch configuration
parameters quickly without the need for a computer or
software. Straight M12 A-Coded 4-pin male connector.
Includes connection status LED. One configuration device
per switch is recommended.
SERIAL-DB9-M12
Serial Interface Cable
See section “Serial Interface” for additional details.

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Copyright, © N-Tron Corp., 2012
3101 International Drive East, Building 6
Mobile, AL 36606 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 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.

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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.
Contact Information
N-Tron Corp.
3101 International Drive East
Building 6
Mobile, AL 36606
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.
WARNING: Must be installed in a pollution degree 2 environment.
ELECTRICAL SAFETY
WARNING: Disconnect the power cable before removing the top cover.
WARNING: Do not operate the unit with the any cover removed.
WARNING: Properly ground the unit before connecting anything else to the unit. Units not properly
grounded may result in a safety risk and could be hazardous and may void the warranty. See the grounding
technique section of this user manual for proper ways to ground the unit.
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: Observe proper DC Voltage polarity when installing power input cables. Reversing voltage
polarity can cause permanent damage to the unit and void the warranty.
WARNING: Explosion Hazard – Substitution of components may impair suitability for Class 1, Div. 2.

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WARNING: Explosion Hazard – Do not disconnect while circuit is live unless area is known to be non-
hazardous.
WARNING: Use 110˚C or higher rated copper wire, (0.22Nm) 2lb/in tightening torque for field installed
conductors.
WARNING: For redundant applications both inputs must be provided from the same Class 2 source.

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Ingress Protection IP67
The classification of degrees of protection provided by the enclosures is defined by IEC 60529. Each rating
is defined by specific tests.
The IP number is comprised of two numbers, the first referring to the protection against solid objects and
the second against fluids. The higher the number, the better the device is protected against contact with
moving parts and the harmful entry of various forms of moisture.
1st IP Protection against ingress of solids 2nd IP Protection against ingress of liquids
0 No protection 0 No protection
1 Protected against solid objects over 50mm e.g. hands,
large tools. 1 Protected against vertically falling drops of water.
2 Protected against solid objects over 12mm e.g. hands,
large tools. 2 Protected against direct sprays of water up to 15° from vertical.
3 Protected against solid objects over 2.5mm e.g. wire,
small tools. 3 Protected against direct sprays of water up to 60° from vertical.
4 Protected against solid objects over 1.0mm e.g. wires. 4 Protected against water sprayed from any direction.
Limited ingress permitted.
5 Limited protection against dust ingress (no harmful
deposit) 5 Protected against low pressure water jets from any direction. Limited ingress permitted.
6 Totally protected against dust ingress. 6 Protected against high pressure water jets from any
direction. Limited ingress permitted.
7 Protected against temporary immersion between
15cm to 1m.
8 Protected against long periods of immersion under
pressure.
The 708M12 & 716M12 Industrial Ethernet Switches are fully protected against dust and will remain sealed
when immersed in water to a depth of 1 meter for 1 hour when all the ports are properly mated or sealed.
These IP67 caps seal off the unused ports protecting them from dirt, water, oil or any other
contaminants which might be present in the close proximity of the switch.
Please make sure the Ethernet Switch package contains the following items:
1. 708M12 or 716M12 Industrial Ethernet Switch
2. Product CD
Contact your carrier if any items are damaged.
Installation
Read the following warning before beginning the installation:
WARNING

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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.
Observe proper DC Voltage polarity when installing power input cables. Reversing voltage polarity can
cause permanent damage to the unit and void the warranty.
Use 110˚C or higher rated copper wire, (0.22Nm) 2lb/in tightening torque for field installed conductors.
For redundant applications both inputs must be provided from the same Class 2 source.
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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Bulkhead Mounting
The following are the mechanical dimensions and drill hole placements to consider when mounting the
708M12 & 716M12 Industrial Ethernet Switches within an enclosure:
708M12

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716M12

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Front Panel
LNK/ACT Link/Activity LED
M12 D-Coded Female Ports All 8 or 16 ports are Auto sensing 10/100BaseTX
M12 A-Coded Male Port Redundant Power Input (10-30VDC, 708M12); (10-49VDC, 716M12)
Green LED lights when Power is connected
M12 A-Coded Female Port Serial COM Port (CLI)
M12 A-Coded Female Port NTCD-M12 (N-Tron Configuration Device)
LED’s: The table below describes the operating modes:
LED Color Description
GREEN Power is Applied with no active faults.
RED Power is Applied with an active fault.
OFF Power is not Applied.
LNK ON Link established.
OFF No link established.
ACT BLINKING Link established, Activity on cable.
OFF No link established.

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Applying Power
708M12 716M12
The M12 A coded power connector is keyed, where the mating connection from the power supply
can be made only when the male and female ends are lined up properly.
When the power is first connected all LED’s will flash ON Momentarily.
Verify the Power LED stays ON (GREEN).
Note: Either V1or V2can be connected to power for minimal operation. For redundant applications both
inputs must be provided from the same Class 2 source. The power cord should be limited to less than 10
meters in order to ensure optimum performance.
Recommended 24V DC Power Supplies, similar to:
100VAC/240VAC:
N-Tron NTPS-24-1.3, DC 24V/1.3A

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N-TRON 708M12 Grounding Techniques
Drain wire with lug connecting switch chassis to known grounding point.
N-TRON 716M12 Grounding Techniques
Drain wire with lug connecting switch chassis to known grounding point.
CONNECTING THE UNIT
For 10Base-T ports, plug a Category 3 (or greater) twisted pair cable into the M12 connector. For
100Base-T ports, plug a Category 5 (or greater) twisted pair cable into the M12 connector. Connect
the other end to the far end station. Verify that the LNK LED’s are ON once the connection has
been completed. To connect any other port to another Switch or Repeater, use a standard Cat5
straight through or crossover cable.
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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SERIAL INTERFACE
The 708M12 & 716M12 Switch provides an EIA-232 interface accessed via an A Coded female connector
(labeled ‘COM’ on the unit). This is used to access the Command Line Interpreter (CLI). The pin-outs are
shown below:
SERIAL-DB9-M12
Serial Cable
Connect the serial COM port of your PC and the 708M12 or 716M12 Switch using N-Tron’s SERIAL-DB9-
M12 serial cable. You will require a cable with a 9-pin or 25-pin sub-D female connector for the PC end,
and a 4-Pin A Coded M12 Male connector for the 708M12 or 716M12 end.
The following table shows the pin-out and the connections for both types of cable:
PC Port 25-Pin 9-Pin 708M12 or 716M12
Female Female 4-Pin A Coded M12 Male
Signal Name Pin # Pin # Pin # Signal Name
TXD 2 3 2 RXD
RXD 3 2 1 TXD
GND 7 5 3/4 GND
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:
- Half 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. ‘Mirrored Data Only’
can be selected and this selects for mirrored data only to be transmitted to the destination port, as opposed to
mirrored data and whatever other data is otherwise destined for the destination Port.
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.
Quality of Service (QoS)
Quality of service (QoS) refers to resource reservation control mechanisms. Quality of service is the ability
to provide different priority to different applications, users, or data flows. Quality of service guarantees are
important if the network capacity is insufficient, especially for real-time streaming multimedia applications

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such as voice over IP, online games and IP-TV, since these often require fixed bit rate and are delay
sensitive, and in networks where the capacity is a limited resource, for example in cellular data
communication. In the absence of network congestion, QoS mechanisms are not required.
Each of these three QOS methods below is included or not based on the settings on the relevant browser
page:
1) Force High Priority (Port Based),
2) IEEE802.1p (Tagged QOS), or
3) DSCP (differentiated services code points) (RFC 2474).
When Force High Priority is enabled, the port based priority is included in the decision for all ports and all
frames received on a port will use the default QOS priority for that port in the decision. For example, if it is
desired to have ingress frames on a port egress to the highest priority transmit queue regardless of other
factors, then enable Force High Priority and the port's Priority will be 7.
Virtual LAN
The switch provides support for setting up tagged Virtual LANs (Local Area Networks). A port may belong
to any number of Virtual LANs. The VLAN membership of a device is determined by the VLAN(s) that
have been defined for the port to which the device is connected. If a device should move from one port to
another, it loses its current VLAN membership and inherits that of the new port it is connected to.
VLANs facilitate easy administration of logical groups of devices that can communicate as if they were on
the same LAN. Traffic between VLANs is restricted, unless the ports are explicitly configured as
overlapping VLANs. Switches forward unicast, multicast, and broadcast traffic only on LAN segments that
serve the VLAN to which the traffic belongs.
A Default Virtual LAN (VID=1) 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’ switch 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,
because that is the most common operation. But, if desired, the port can be included in VLAN 1 by
configuring VLAN 1 last.
If switch ports are configured to transmit and receive untagged frames, end devices are able to communicate
throughout the 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 to 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.
For each switch port there is one and only one PVID (port VLAN ID) setting. If an incoming frame is
untagged and untagged frames are being accepted, then that frame will inherit the tag of the PVID value for
that port. Subsequent switch routing and treatment will be in accordance with that VLAN switch map. By
configuring PVIDs properly and configuring for all frames to exit untagged, the switch can achieve a ‘port
VLAN’ configuration in which all frames in and out can be untagged, thus not requiring external devices to
be VLAN cognizant.
To understand how a VLAN configuration will perform, first look at the port on which the frame enters the
switch, then the VLAN ID (if the frame is tagged) or the PVID (if the frame is untagged). The VLAN

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defined by the VID or PVID defines a VLAN group with a membership of ports. This membership
determines whether a port is included or excluded as to frame egress from the switch.
The 708M12 & 716M12 Series switches also have 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 the ‘VLAN Configuration
Examples’ in this document, and/or our website’s technical documents. Note that RSTP on overlapping
VLANs is not supported and the system will automatically disable RSTP on all but the lowest VID VLANs
that have overlapping ports.
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 700 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
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 700 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 700 Series supports v1 and v2.