1) MSR (Multiple Super Ring) is Korenix's patented redundant ring technology that makes local area networks (LANs) more reliable. It automatically elects one switch as the Ring Manager (RM) while the others become backup RMs. 2) In the event of a link or device failure, the RM activates its backup path to allow traffic to resume while preparing for seamless restoration. If the RM fails, the next switch becomes the new RM to maintain ring control. 3) MSR provides fast failure recovery within 5ms to minimize packet loss, eliminates single points of failure by having backup RMs, and achieves seamless restoration within 0ms without disrupting traffic flow or causing topology

1. MSR (Multiple Super Ring)
Make A More Reliable LAN by
Korenix MSR
Industrial Data Communication by Korenix – A Beijer Group Company
Link loss RM failure
Backup RM
Backup RM
Backup RM
Backup RM
How It Works
There are 4 running stages:
Configure & Install: Switches are linked into a ring. One of them
is automatically elected as RM (Ring Manager), while the others
become backup RM. RM blocks one of its ring ports as a backup
path and starts to monitor the ring status.
Failure Recovery: Following a link or device failure, RM activates
its backup path. Topology changes and traffic resumes. RM will
jump to the failure position and prepares for later Seamless
Restoration (patented). In case of RM failure, the one next to it
becomes RM. The ring is always under control. (patented)
Trouble Shooting: The ring is broken and has to be fixed asap.
MSR warns and provides information about the failure position
to help fast trouble shooting.
Restoration: Putting a new link to fix the failure. The ring forms
again. MSR achieves 0ms Seamless Restoration by using the
restored link as the backup path. Traffic flows as it was without
being disturbed. There is no topology change, packet loss, or
broadcast storm. It’s the most stable ring technology. (patented)
Korenix’s patented redundant ring technology delivers more benefits than fast recovery. It’s fast, stable, and
easy to use. Its unique design eliminates the risks of single point of failure or broadcast storm. It turns out a
comprehensive superiority over other ring technologies through all running stages.

2. Configuration made easy
Superior In All Running Stages
It’s designed to be used without the need of IT knowledge. RM and backup path are elected automatically.
Step 1
Create a new ring with an ID
Step 2
Choose ring ports
Step 3
Enable (Done!)
MSR Other proprietary rings *
CONFIGURE
& INSTALL
• Simple
• Assign ring ports and enable
• RM and backup path auto selected
• Mistake indication
• Manually
• Not support
FAILURE
RECOVERY
• Fast
• 5ms recovery minimizes packet loss
• RM Redundancy – no critical point
• Network resumes immediately
• 20ms or more
• Single point of failure
• Wait until RESTORATION
TROUBLE
SHOOTING
• Clear
• LED failure positioning
• Warning notification
• Live topology map
• No LED positioning
RESTORATION • Seamless
• 0ms Seamless Restoration
• No topology change – stable
• No packet loss – no error
• No broadcast storm – risk free
• 20ms or more
• Topology change
• Packet loss or risk of
broadcast storm
Healthy Link Loss Configure Error
?
* In most cases
Ring Status LED indicator helps field engineers to identify failure cause and position.
Industrial Data Communication by Korenix – A Beijer Group Company

3. More Than One Ring
MultiRing connects multiple rings in the simplest
way. Each ring operates independently.
TrunkRing multiples the bandwidth and the
redundancy by aggregating multiple ring links.
Rapid Dual Homing connects to a 3rd party network
by multiple nodes or redundant links.
Super Chain extends a ring network by a chain.
The chain has its own redundant protection.
• How many nodes can be in a ring? Up to 250 switches in a ring without compromise in recovery time.
• What speed and media? It doesn’t matter. A ring can be composed by 100Mbps or gigabit, by
copper or fiber mixed.
• Why can’t I find RM indicator? The RM of most ring technologies is fixed and is a critical point. It’s
very important to know RM position for the reason of single point of
failure. Thanks to the patent of RM Redundancy, MSR solves this
issue and uses RS (Ring Status) indicator instead for more benefits.
• How to monitor the ring status? You can monitor ring status by LED indicator, web, CLI, SNMP,
Korenix network management software, Modbus TCP, and can be
informed by email, SNMP trap, relay alarm for warning events.
• Why broadcast storm occurs to a
ring and how to solve it?
A ring without a blocking path is a loop, which let go broadcast
packet runs in the circle endlessly and overwhelms the network in a
blink. It is highly risky during restoration, reboot from blackout, or
RM failure. MSR’s Seamless Restoration prevents loop, RM
Redundancy recovers RM failure, which in turn eliminates the
possibility of broadcast storm.
FAQ
Industrial Data Communication by Korenix – A Beijer Group Company