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Moxa PM-7200-6MST [4/36] Introduction to communication
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1
1. Introduction to Communication
Redundancy
Setting up Communication Redundancy on your network helps protect critical links against failure, protects
against network loops, and keeps network downtime at a minimum.
Communication Redundancy 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 communication redundancy 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 Ethernet ports and under 50
ms for Gigabit Ethernet ports.
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.
Содержание
- Communication redundancy 1
- Fourth edition march 2015 1
- User s manual 1
- Www moxa com product 1
- Communication redundancy 2
- Copyright notice 2
- Disclaimer 2
- Technical support contact information 2
- Trademarks 2
- User s manual 2
- Www moxa com support 2
- Table of contents 3
- Introduction to communication 4
- Redundancy 4
- Communication redundancy introduction to communication redundancy 5
- Gigabit ethernet redundant ring capability 50 ms 5
- Turbo ring 6
- Communication redundancy turbo ring 7
- Determining the redundant path of a turbo ring ring 7
- Setting up turbo ring or turbo ring v2 7
- The turbo ring concept 7
- When the number of switches in the turbo ring is even 7
- Attention 8
- Communication redundancy turbo ring 8
- Determining the redundant path of a turbo ring v2 ring 8
- Ring coupling configuration 8
- When the number of switches in the turbo ring is odd 8
- Attention 9
- Communication redundancy turbo ring 9
- Ring coupling for a turbo ring ring 9
- Ring coupling for a turbo ring v2 ring 9
- Dynamic ring coupling drc configuration applies only to 10
- Turbo ring v2 10
- Attention 11
- Communication redundancy turbo ring 11
- Dual ring configuration applies only to turbo ring v2 11
- Dual ring for a turbo ring v2 ring 11
- Communication redundancy turbo ring 12
- Configuring turbo ring 12
- Configuring turbo ring and turbo ring v2 12
- Dual homing configuration applies only to turbo ring v2 12
- Communication redundancy turbo ring 13
- Explanation of current status items 13
- Explanation of settings items 13
- Communication redundancy turbo ring 14
- Communication redundancy turbo ring 15
- Configuring turbo ring v2 15
- Explanation of current status items 15
- Communication redundancy turbo ring 16
- Explanation of settings items 16
- Communication redundancy turbo ring 17
- Communication redundancy turbo ring 18
- Communication redundancy turbo ring 19
- Configuring turbo ring v2 with dynamic ring coupling 19
- Explanation of ring status items 19
- Communication redundancy turbo ring 20
- Explanation of drc status items 20
- Explanation of ring settings items 20
- Turbo chain 21
- Communication redundancy turbo chain 22
- Setting up turbo chain 22
- The turbo chain concept 22
- Communication redundancy turbo chain 23
- Configuring turbo chain 23
- Explanation of current status items 23
- Head switch configuration 23
- Member switch configuration 23
- Tail switch configuration 23
- Communication redundancy turbo chain 24
- Explanation of settings items 24
- Communication redundancy turbo chain 25
- Stp rstp mstp 26
- Communication redundancy stp rstp mstp 27
- The stp rstp mstp concept 27
- What is stp 27
- Communication redundancy stp rstp mstp 28
- How stp works 28
- Stp requirements 28
- Communication redundancy stp rstp mstp 29
- Differences between stp rstp and mstp 29
- Stp calculation 29
- Stp configuration 29
- Stp reconfiguration 29
- Communication redundancy stp rstp mstp 30
- Stp example 30
- Communication redundancy stp rstp mstp 31
- Configuring stp rstp 31
- Using stp on a network with multiple vlans 31
- Communication redundancy stp rstp mstp 32
- Communication redundancy stp rstp mstp 33
- Configuring mstp 33
- Communication redundancy stp rstp mstp 34
- Communication redundancy stp rstp mstp 35
- Communication redundancy stp rstp mstp 36
- Configuration limits of stp rstp 36
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