Moxa Technologies EDS-518E User manual

Moxa Managed Ethernet Switch
Redundancy Protocol (UI 2.0)
User’s Manual
Edition 4.0, September 2017
www.moxa.com/product
Models covered by this manual:
EDS-528E, EDS-518E, EDS-510E, EDS-G508E, EDS-G512E,
EDS-G512E-8PoE, EDS-G516E, IKS-6726A, IKS-6728A,
IKS-6728A-8PoE, IKS-G6524A, IKS-G6824A, ICS-G7526A, ICS-G7826A,
ICS-G7528A, ICS-G7828A, ICS-G7748A, ICS-G7848A, ICS-G7750A,
ICS-G7850A, ICS-G7752A, ICS-G7852A Series
© 2017 Moxa Inc. All rights reserved.

Moxa Managed Ethernet Switch
Redundancy Protocol (UI 2.0)
User’s Manual
The software described in this manual is furnished under a license agreement and may be used only in accordance with
the terms of that agreement.
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© 2017 Moxa Inc. All rights reserved.
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Table of Contents
1. Introduction to Redundancy Protocol................................................................................................ 1-1
2. Turbo Ring ........................................................................................................................................ 2-1
The Turbo Ring Concept ...................................................................................................................... 2-2
Setting up “Turbo Ring” or “Turbo Ring V2”............................................................................................2-2
Determining the Redundant Path of a “Turbo Ring” Ring...................................................................2-2
Determining the Redundant Path of a “Turbo Ring V2” Ring ..............................................................2-3
Ring Coupling Configuration.......................................................................................................... 2-3
Dual-Ring Configuration (applies only to “Turbo Ring V2”) ................................................................2-5
Dual-Homing Configuration (applies only to “Turbo Ring V2”) ...........................................................2-5
Configuring “Turbo Ring” and “Turbo Ring V2”........................................................................................2-6
Configuring “Turbo Ring”..............................................................................................................2-6
Configuring “Turbo Ring V2” .........................................................................................................2-8
3. Turbo Chain....................................................................................................................................... 3-1
The Turbo Chain Concept..................................................................................................................... 3-2
Setting Up Turbo Chain .......................................................................................................................3-2
Configuring “Turbo Chain”.................................................................................................................... 3-2
Head Switch Configuration............................................................................................................3-3
Member Switch Configuration .......................................................................................................3-3
Tail Switch Configuration.............................................................................................................. 3-3
4. STP/RSTP/MSTP ............................................................................................................................... 4-1
The STP/RSTP/MSTP Concept ...............................................................................................................4-2
What is STP? .............................................................................................................................. 4-2
How STP Works...........................................................................................................................4-3
Differences between STP, RSTP, and MSTP .....................................................................................4-4
STP Example ......................................................................................................................................4-5
Using STP on a Network with Multiple VLANs .......................................................................................... 4-6
Configuring STP/RSTP .........................................................................................................................4-6
Configuring MSTP ...............................................................................................................................4-9
Configuration Limits of STP/RSTP........................................................................................................ 4-12
5. V-ON ................................................................................................................................................. 5-1
The V-ON Concept ..............................................................................................................................5-2
V-ON Topology ...................................................................................................................................5-3
Overall Network Fast Recovery......................................................................................................5-3
Local Network Fast Recovery ........................................................................................................5-4
Instructions for Setting Up V-ON ..........................................................................................................5-4

1
1. Introduction to Redundancy Protocol
Setting up Redundancy Protocol on your network helps protect critical links against failure, protects against
network loops, and keeps network downtime at a minimum.
Redundancy Protocol allows you to set up redundant loops in the network to provide a backup data
transmission route in the event that a cable is inadvertently disconnected or damaged. This is a particularly
important feature for industrial applications, since it could take several minutes to locate the disconnected or
severed cable. For example, if the Moxa switch is used as a key communications component of a production line,
several minutes of downtime could cause a big loss in production and revenue. The Moxa switch supports three
different protocols to support this Redundancy Protocol function:
•Turbo Ring and Turbo Ring V2
•Turbo Chain
•Rapid Spanning Tree and Spanning Tree Protocols(IEEE 802.1W/802.1D-2004)
When configuring a redundant ring, all switches on the same ring must be configured to use the same
redundancy protocol. You cannot mix the Turbo Ring, Turbo Ring V2, and STP/RSTP protocols on the same ring.
The following table lists the key differences between the features of each protocol. Use this information to
evaluate the benefits of each, and then determine which features are most suitable for your network.
Turbo Ring Turbo Ring V2 Turbo Chain STP RSTP
Topology Ring Ring Chain Ring, Mesh Ring, Mesh
Fast Ethernet
Recovery Time
< 300 ms < 20 ms < 20 ms Up to 30 sec. Up to 5 sec.
Gigabit Ethernet
Recovery Time
< 50 ms < 50 ms
NOTE
Most of Moxa’s managed switches now support three proprietary Turbo Ring protocols
:
1.
Turbo Ring refers to the original version of Moxa’s proprietary redundant ring protocol, which has a
recovery time of under 300 ms.
2.
Turbo Ring V2 refers to the new generation Turbo Ring, which has a recovery time of under 20 ms for
Fast
Ethernet ports and under 50 ms for Gigabit Ethernet ports.
3.
Turbo Chain is a new Moxa proprietary protocol with unlimited flexibility that allows
you to construct any
type of redundant network topology. The recovery time is under 20 ms for Fast Ethern
et ports and under 50
ms for Gigabit Ethernet ports. To achieve a recovery time under 50 ms in a Gigabit Turbo Chain, we
recommend using a Gigabit fiber port as Head port.
In this manual, we use the terminology
Turbo Ring and Turbo Ring V2 to differentiate between rings
configured for one or the other of these protocols.

Managed Ethernet Switch Redundancy Protocol (UI 2.0) Introduction to Redundancy Protocol
1-2
Gigabit Ethernet Redundant Ring Capability (< 50 ms)
Ethernet has become the default data communications
medium for industrial automation applications. In fact,
Ethernet
is often used to integrate video, voice, and
high
-rate industrial application data transfers into one
network.
Moxa switches come equipped with a redundancy
G
igabit Ethernet protocol called Gigabit Turbo Ring. With
Gigabit Turbo Ring, if any segm
ent of the network gets
disconnected, your automation system will be back to
normal in less than
300 ms (Turbo Ring) or 50 ms (Turbo
Ring V2)
.
NOTE
Port trunking and Turbo Ring
, Turbo Ring V2, and Turbo Chain can be enabled simultaneously to form a
backbone.
However, firmwares released before edition 5.0
do not support port trunking with Turbo Ring V2 and
Turbo Chain
.
Doing so will increase the bandwidth of the backbone, and also provide redundancy. For example,
suppose that two physical ports, 1 and 2, are trunked to form trunk group Trk1, and then Trk1 is set as one
Turbo Ring path
. If port 1 gets disconnected, the remaining trunked port, port 2, will share the traffic. If port
s
1 and 2 are both disconnected,
then Turbo Ring will create a backup path within 300 ms.

2
2. Turbo Ring
The following topics are covered in this chapter:

The Turbo Ring Concept

Setting up “Turbo Ring” or “Turbo Ring V2”
Determining the Redundant Path of a “Turbo Ring” Ring
Determining the Redundant Path of a “Turbo Ring V2” Ring
Ring Coupling Configuration
Dual-Ring Configuration (applies only to “Turbo Ring V2”)
Dual-Homing Configuration (applies only to “Turbo Ring V2”)

Configuring “Turbo Ring” and “Turbo Ring V2”
Configuring “Turbo Ring”
Configuring “Turbo Ring V2”

Managed Ethernet Switch Redundancy Protocol (UI 2.0) Turbo Ring
2-2
The Turbo Ring Concept
Moxa developed the proprietary Turbo Ring protocol to optimize redundancy and achieve a faster recovery time
on the network.
The Turbo Ring and Turbo Ring V2 protocols identify one switch as the master of the network, and then
automatically block packets from traveling through any of the network’s redundant loops. In the event that one
branch of the ring gets disconnected from the rest of the network, the protocol automatically readjusts the ring
so that the part of the network that was disconnected can reestablish contact with the rest of the network.
Setting up “Turbo Ring” or “Turbo Ring V2”
1.
Select any two ports as redundant ports.
2.
Connect the redundant ports to form the Turbo Ring.
The user does not need to configure any of the switches as the master to use Turbo Ring or Turbo Ring V2. If
none of the switches in the ring is configured as the master, then the protocol will automatically assign master
status to one of the switches. In fact, the master is only used to identify which segment in the redundant ring
acts as the backup path. In the following subsections, we explain how the redundant path is selected for rings
configured for Turbo Ring, and Turbo Ring V2.
Determining the Redundant Path of a “Turbo Ring” Ring
In this case, the redundant segment (i.e., the segment that will be blocked during normal operation) is
determined by the number of switches in the ring, and where the ring master is located.
When the Number of Switches in the Turbo Ring is Even
If there are 2N
switches (an even number) in the “Turbo
Ring”
ring, then the backup segment is one of the two
segments connected to the (N+1)
st switch (i.e., the
switch
directly opposite the
master).

Managed Ethernet Switch Redundancy Protocol (UI 2.0) Turbo Ring
2-3
When the Number of Switches in the Turbo Ring is Odd
If there are 2N+1
switches
(an odd number) in the “Turbo
Ring”
ring, with switches and segments labeled
counterclockwise, then segment N+1 will serve as the
backup path
.
For the example shown here, N=1, so that N+1=2.
Determining the Redundant Path of a “Turbo Ring V2” Ring
For a
“Turbo Ring V2” ring, the backup segment is the
segment connected to the 2nd redundant port on the
master.
See
Configuring “Turbo Ring V2” in the
Configuring “Turbo
Ring” and “Turbo Ring V2”
section below.
Ring Coupling Configuration
For some systems, it may not be convenient to connect all devices in the system to create one BIG redundant
ring, since some devices could be located in a remote area. For these systems, Ring Coupling can be used to
separate the devices into different smaller redundant rings, but in such a way that they can still communicate
with each other.
ATTENTION
In
a VLAN environment, the user must set Redundant Port, Coupling Port, and Coupling Control Port
to
join all VLANs,
since these ports act as the backbone to transmit all packets of different VLANs to different
switches
.

Managed Ethernet Switch Redundancy Protocol (UI 2.0) Turbo Ring
2-4
Ring Coupling for a “Turbo Ring” Ring
To configure the Ring Coupling function for a “Turbo Ring” ring, select two switches (e.g., Switch A and B in the
above figure) in the ring, and another two switches in the adjacent ring (e.g., Switch C and D). Decide which
two ports in each switch are appropriate to be used as coupling ports, and then link them together. Next, assign
one switch (e.g., Switch A) to be the coupler and connect the coupler’s coupling control port with Switch B (for
this example).
The coupler switch (i.e., Switch A) will monitor Switch B through the coupling control port to determine whether
or not the coupling port’s backup path should be recovered.
Ring Coupling for a “Turbo Ring V2” Ring
Note that the ring coupling settings for a “Turbo Ring V2” ring are different from a “Turbo Ring” ring. For Turbo
Ring V2, Ring Coupling is enabled by configuring the Coupling Port (Primary) on Switch B, and the Coupling
Port (Backup) on Switch A only. You do not need to set up a coupling control port, so that a “Turbo Ring V2”
ring does not use a coupling control line.
The Coupling Port (Backup) on Switch A is used for the backup path, and connects directly to an extra
network port on Switch C. The Coupling Port (Primary) on Switch B monitors the status of the main path,
and connects directly to an extra network port on Switch D. With ring coupling established, Switch A can
activate the backup path as soon as it detects a problem with the main path.

Managed Ethernet Switch Redundancy Protocol (UI 2.0) Turbo Ring
2-5
ATTENTION
Ring Coupling only needs to be enabled on one of the switches serving as the Ring Coupler. The Coupler must
designate different ports as the two Turbo Ring ports and the coupling port.
NOTE
You do not need to use the same
switch for both Ring Coupling and Ring Master.
Dual-Ring Configuration (applies only to “Turbo Ring V2”)
The dual-ring option provides another ring coupling configuration, in which two adjacent rings share one
switch. This type of configuration is ideal for applications that have inherent cabling difficulties.
Dual-Ring for a “Turbo Ring V2” Ring
Dual-Homing Configuration (applies only to “Turbo Ring V2”)
The dual-homing option uses a single Ethernet switch to connect two networks. The primary path is the
operating connection, and the backup path is a back-up connection that is activated in the event that the
primary path connection fails.
Dual-Homing for a “Turbo Ring V2” Ring

Managed Ethernet Switch Redundancy Protocol (UI 2.0) Turbo Ring
2-6
Configuring “Turbo Ring” and “Turbo Ring V2”
Use the scrollbar at the top of the Redundancy Protocol page to select Turbo Ring, Turbo Ring V2,Turbo
Chain,RSTP,or MSTP.Note that the configuration pages for these five protocols are different.
Protocol
Setting Description Factory Default
Turbo Ring Select this item to change to the Turbo Ring configuration page.
None
Turbo Ring V2 Select this item to change to the Turbo Ring V2 configuration
page.
Turbo Chain Select this item to change to the Turbo Chain configuration
page.
RSTP (IEEE
802.1D-2004)
Select this item to change to the RSTP configuration page.
MSTP (IEEE 802.1s) Select this item to change to the MSTP configuration page.
Configuring “Turbo Ring”
The following figure indicates which Turbo Ring parameters can be configured. A more detailed explanation of
each parameter follows.
Explanation of “Status” Items
Active Protocol
Shows which redundancy protocol is in use: Turbo Ring, Turbo Ring V2, Turbo Chain, RSTP,MSTP or
None.
Ring: Role
Indicates whether or not this switch is the Master or Slave of the Turbo Ring.
NOTE
The user does not need to set the master to use Turbo Ring. If master is
not
set, the Turbo Ring protocol will
assign master status to one of the
switches
in the ring. The master is only used to determine which segment
serves as the backup path.

Managed Ethernet Switch Redundancy Protocol (UI 2.0) Turbo Ring
2-7
Ring: Turbo Ring Status
Shows Healthy if the ring is operating normally, and shows Break if the ring’s backup link is active.
Ring: 1st Port Status / Ring: 2nd Port Status
The “Ports Status” indicators show Forwarding for normal transmission, Blocking if this port is connected to
a backup path and the path is blocked, and Link down if there is no connection.
Ring Coupling: Role
Indicates whether or not this switch is assigned as coupler.
Ring Coupling: Coupling Port Status
Ring Coupling: Coupling Control Port Status
The “Ports Status” indicators show Forwarding for normal transmission, Blocking if this port is connected to
a backup path and the path is blocked, and Link down if there is no connection.
Explanation of “Settings” Items
Set as Master
Setting Description Factory Default
Enabled
Select this switch as Master
Not checked
Disabled Do not select this switch as Master
Redundant Ports
Setting Description Factory Default
1st Port Select any port of the switch to be one of the redundant ports.
Port G2
2nd Port Select any port of the switch to be one of the redundant ports.
Port G3
Ring Coupling: Enable
Setting Description Factory Default
Enable Select this switch as Coupler Not checked
Disable Do not select this switch as Coupler
Ring Coupling: Coupling Port
Setting Description Factory Default
Coupling Port Select any port of this switch to be the coupling port Port G1
Ring Coupling: Coupling Control Port
Setting Description Factory Default
Coupling Control Port Select any port of this switch to be the coupling control port Port 7

Managed Ethernet Switch Redundancy Protocol (UI 2.0) Turbo Ring
2-8
Configuring “Turbo Ring V2”
The following figure indicates which Turbo Ring V2 parameters can be configured. A more detailed explanation
of each parameter follows.
NOTE
When using the Dual
-Ring architecture, you
must configure settings for both Ring 1 and Ring 2. In this case, the
status of both rings will appear under “Status.”
Explanation of “Status” Items
Active Protocol
Shows which redundancy protocol is in use: Turbo Ring, Turbo Ring V2, Turbo Chain, RSTP, MSTP or
None.
Ring 1/2: Role
Indicates whether or not this switch is the Master or Slave of the Turbo Ring. (When using the Dual-Ring
architecture and this switch is selected to operate on both rings, you must configure settings for both Ring 1
and Ring 2 at this switch. In this case, the status of both rings will appear under “Status.”)
NOTE
The user does not need to set the master to use Turbo Ring. If master is
not
set, the Turbo Ring protocol will
assign master status to one of the
switches
in the ring. The master is only used to determine which segment
serves as the backup path.
Ring 1/2: Turbo Ring Status
Shows Healthy if the ring is operating normally, and shows Break if the ring’s backup link is active.

Managed Ethernet Switch Redundancy Protocol (UI 2.0) Turbo Ring
2-9
Ring 1/2: 1st Port Status / Ring 1/2: 2nd Port Status
The “Ports Status” indicators show Forwarding for normal transmission, Blocking if this port is connected to
a backup path and the path is blocked, and Link down if there is no connection.
Ring Coupling: Role
Indicates None, Dual Homing, or Ring Coupling.
Ring Coupling: Primary Port
The “Primary Port” indicators show Forwarding for normal transmission, and Link down if there is no
connection.
Ring Coupling: Backup Port Status
The “Backup Port Status” indicators show Forwarding, Blocking, or Link down.
Explanation of “Settings” Items
Ring 1
Setting Description Factory Default
Enabled Enable the Ring 1 settings checked
Disabled Disable the Ring 1 settings
Ring 2*
Setting Description Factory Default
Enabled Enable the Ring 2 settings Not checked
Disabled Disable the Ring 2 settings
NOTE
You should enable both Ring 1 and Ring 2
when the switch interconnects between Ring 1 and Ring 2 in the
Dual
-Ring architecture.
Set as Master (Ring 1/2)
Setting Description Factory Default
Enabled Select this switch as Master Not checked
Disabled Do not select this switch as Master
Redundant Ports (Ring 1/2)
Setting Description Factory Default
1st Port Select any port of this switch to be one of the redundant ports.
Ring 1: G2
Ring 2: G1
2nd Port Select any port of this switch to be one of the redundant ports.
Ring 1: G3
Ring 2: 7
Ring Coupling: Enable
Setting Description Factory Default
Enable Select this switch as Coupler Not checked
Disable Do not select this switch as Coupler
Ring Coupling: Coupling Mode
Setting Description Factory Default
Dual Homing Select this item to change to the Dual Homing configuration
page
Primary port: 1
Backup port: 2
Ring Coupling
(backup)
Select this item to change to the Ring Coupling (backup)
configuration page
Port 1
Ring Coupling
(primary)
Select this item to change to the Ring Coupling (primary)
configuration page
Port 1

Managed Ethernet Switch Redundancy Protocol (UI 2.0) Turbo Ring
2-10
NOTE
The Turbo Ring DIP Switches located on the
outer casing of the EDS E series switches
can be used to configure
switch
Turbo Ring protocols (Turbo Ring or Turbo Ring V2).
If the
Turbo Ring DIP Switch is enabled from any access interface (web-based UI, console, or Telnet)
, and
the 4
th DIP Switch on the switch outer casing is set to ON, the Redundancy
Protocol will be set automatically to
the
Turbo Ring protocol based on the version configured in the Turbo Ring DIP Switch page, and the
corresponding Redundant Ports, Coupling Ports
, and Coupling Control Port will be fixed to the
assigned factory
default port number automatically.
In this case, you will not be able to use the web-
based UI, console, or Telnet
i
nterface to change the status of the DIP Switch and all settings in the Redundancy Protocol page will not
be
allow
ed to be configured, as shown in the following figure:
In addition
, those default Redundant Ports, Coupling Ports, and Coupling Control Port will be added
automatically to all VLANs (i.e.
, to act as “Trunk Ports”) if you set the 4th DIP Switch to the “ON”
position when
the Turbo Ring DIP Switch is enabled. Once you flip the 4th DIP Switch back from
ON to OFF
when the Turbo
Ring DIP Switch is e
nabled, such default Redundant Ports, Coupling Ports,
and Coupling Control Port that were
added to all VLANs will be restored to their previous software settings.
NOTE
If you would like to enable VLAN and/or port trunking on any of the last four ports, do not use the fourth DIP
switch to activate Turbo Ring. In this case, you should use the Web, Telnet, or Serial console to activate Turbo
Ring.
NOTE
Turbo Ring V2 or Turbo Chain is one function of V
-ON technology that
should be enabled in layer 2 and layer 3
switches. For
a detailed introduction, please refer to Chapter 5, V-ON.

3
3. Turbo Chain
The following topics are covered in this chapter:

The Turbo Chain Concept

Setting Up Turbo Chain

Configuring “Turbo Chain”
Head Switch Configuration
Member Switch Configuration
Tail Switch Configuration

Managed Ethernet Switch Redundancy Protocol (UI 2.0) Turbo Chain
3-2
The Turbo Chain Concept
Moxa’s Turbo Chain is an advanced software technology that gives network administrators the flexibility of
constructing any type of redundant network topology. When using the “chain” concept, you first connect the
Ethernet switches in a chain and then simply link the two ends of the chain to an Ethernet network, as
illustrated in the following figure.
Turbo Chain can be used on industrial networks that have a complex topology. If the industrial network uses a
multi-ring architecture, Turbo Chain can be used to create flexible and scalable topologies with a fast
media-recovery time.
Setting Up Turbo Chain
1. Select the Head switch, Tail switch, and Member switches.
2. Configure one port as the Head port and one port as the Member port in the Head switch, configure one port
as the Tail port and one port as the Member port in the Tail switch, and configure two ports as Member ports
in each of the Member switches.
3. Connect the Head switch, Tail switch, and Member switches as shown in the above diagram.
The path connecting to the Head port is the main path, and the path connecting to the Tail port is the backup
path of the Turbo Chain. Under normal conditions, packets are transmitted through the Head Port to the LAN
network. If any Turbo Chain path is disconnected, the Tail Port will be activated so that packet transmission can
continue.
Configuring “Turbo Chain”
Use the scrollbar at the top of the Redundancy Protocol page to select Turbo Ring, Turbo Ring V2,Turbo
Chain, RSTP,or MSTP.Note that the configuration pages for these five protocols are different.
Protocol
Setting Description Factory Default
Turbo Ring Select this item to change to the Turbo Ring configuration page.
None
Turbo Ring V2 Select this item to change to the Turbo Ring V2 configuration
page.
Turbo Chain Select this item to change to the Turbo Chain configuration page.
RSTP (IEEE
802.1D-2004) Select this item to change to the RSTP configuration page.
MSTP (IEEE 802.1s) Select this item to change to the MSTP configuration page.

Managed Ethernet Switch Redundancy Protocol (UI 2.0) Turbo Chain
3-3
The following figures indicate which Turbo Chain parameters can be configured. A more detailed explanation of
each parameter follows.
Head Switch Configuration
Member Switch Configuration
Tail Switch Configuration

Managed Ethernet Switch Redundancy Protocol (UI 2.0) Turbo Chain
3-4
Explanation of “Status” Items
Active Protocol
Shows which redundancy protocol is in use: Turbo Ring, Turbo Ring V2, Turbo Chain, RSTP,MSTP or
None.
Port
Shows which ports have been assigned for redundancy protocol usage.
Port Role
Shows the role that has been assigned to any specific redundancy port: Head, Member, or Tail.
Port Status
The “Ports Status” indicators show Forwarding for normal transmission, Blocked if this port is connected to
the Tail port as a backup path and the path is blocked, and Link down if there is no connection.
Explanation of “Settings” Items
Role
Setting Description Factory Default
Head Select this switch as Head Switch
Member
Member Select this switch as Member Switch
Tail Select this switch as Tail Switch
Head Role
Setting Description Factory Default
Head Port Select any port of this switch to be the head port. G2
Member Port Select any port of this switch to be the member port. G3
Member Role
Setting Description Factory Default
1st Member port Select any port of this switch to be the 1st member port G2
2nd Member port Select any port of this switch to be the 2nd member port G3
Tail Role
Setting Description Factory Default
Tail Port Select any port of this siwtch to be the tail port. G2
Member Port Select any port of this switch to be the member port. G3
NOTE
Turbo Ring V2 or Turbo Chain is one function of V
-ON technology that
should be enabled in layer 2 and layer 3
switches. For
a detailed introduction, please refer to Chapter 5, V-ON.

4
4. STP/RSTP/MSTP
The following topics are covered in this chapter:

The STP/RSTP/MSTP Concept
What is STP?
How STP Works
Differences between STP, RSTP, and MSTP

STP Example

Using STP on a Network with Multiple VLANs

Configuring STP/RSTP

Configuring MSTP

Configuration Limits of STP/RSTP