Cyber Network Redundancy

In the Industrial network communication, the
reliability of communication always is the critical
issue. Korenix switches adapts new network redundancy
technology – Cyber Network Redundancy includes MSR,
Super Chain, ERPS and IEEE standards- RSTP/MSTP
technologies to ensure network reliability.
The MSR is a seamless network redundant technology,
which includes various technologies for different
network redundancy topologies and applications. It
includes Rapid Super Ring (RSRTM), Rapid Dual
Homing(RDHTM), MultiRingTM and TrunkRingTM. With
those network redundant technologies, a node can be
configured to multiple rings with failover time less
than 50ms, and zero of restoration time.

Rapid Super Ring (RSRTM )Technology
The Rapid Super Ring (RSRTM) technology provides
advanced Ring Redundancy Technology, its shortest
recovery time is from 50ms to few milliseconds for
Fast Ethernet copper/fiber rings, and the Ring-Master
(R.M.) can be auto-selected by RSRTM engine. One of
Ring path of R.M. is primary path, the other is block
path for standby. Once the primary path failed, the 2nd
path will be recovered within few milliseconds.
Besides, the restoration time is shortened to zero in
R.M. auto-selection mode.

Rapid Dual Homing (RDHTM) Technology
The Rapid Dual Homing (RDHTM) is designed to engaged Korenix Rapid Super Ring and other vendors
Ethernet Switch. It provides easy configuration and multiple redundancies, the failover time is fast than
RSTP, and restoration time is zero. Uplinks can be auto detected, and gathered into groups. Each group
path are sorted into primary, secondary, and standby. The Link aggregation is also integrated into RDHTM.
An uplink can be a single or several links as a trunk , which provides better redundancy and capacity.

TrunkRing Technology
The TrunkRing is the combination of two technology of RSR and the link aggregation, and takes the
advantage of aggregation to increase the path bandwidth. The ring links can be either asymmetric or
symmetric. The ring will open only if all the links are broken, and users can enhance the redundancy at
different location in accordance to be the need, the path with less bandwidth is more likely to be used as
the backup path for restoring the network to full play capacity.

MultiRing Technology
The MultiRingTM provides easier connectivity between two or more ring networks. The simplest sample is to
connect two rings by single device. User can extend the network by linking multiple rings into a line or
multiple directions. The MultiRingTM has great diversity of various ring technology, when MutliRingTM
enabled, the Switch can connect TrunkRingTM, RSRTM together and simultaneously provide more high speed
ring connectivity. It provides extensibility while keeping the great compatibility.

Super Chain Technology
The Super Chain is a new Ring technology that
provides a cost-effective way to ring nodes with
presented ring to approached flexible, scalability
and easy construction. The Super Chain includes 2
borders that connect with other ring by edge port,
and the reset nodes are member. Once the ring
broken, the standby edge port will backup in few
milliseconds, and seamless restoration time when
the broken path recovery. Besides, users can add
new super ring with existed super ring to approach
the flexibility to saving the construction cost.

Seamless Ring Port Restoration
Seamless restoration can restore a failed ring without
causing any loop problem, topology change and packet
loss. With mechanism guarantees
a zero second restoration time, this
eliminates any unstable status and the
applications running non-stop. It
ensure MSRTM Ring can harmonic with RSTP protocol. In
the figure, the RM will change to another one which
nearby the broken path.

ITU-T G.8032 ERPS
The ITU-T G.8032 Ethernet Ring Protection Switching
(ERPS) is an ring technology defined by ITU-T. It
include 2 version ring protocols, ERPS v1 and v2. The
v1 supports single ring , and v2 is based on VLAN
concept to construct comprehensive ring architecture
that engaged several major rings and sub ring. The
ERPS protocol is similar as MSR technology with one
major host –RPL Owner and several of RPL nodes. The
ring restoration and recovery time of ERPS is smaller
than 50ms, and slow than MSR. However, the ERPS is
an open Ethernet ring redundant protocol that enabled
different vendor’s ring switch can be integrated
together with great network redundancy.