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Network Redundancy Comparison Table

Recovery STP RSTP RSTP 2004 MSTP Open-Ring O-Ring O-Chain
Technology
10 ~ 50
Recovery Time Seconds 3 ~ 5 Seconds < 100 ms 3 ~ 5 Seconds - < 10 ms Gigabit Network < 10 ms
O-Ring
RGS series
20 80 20
(Note: Recovery time is
(Note: Recovery time is
(Note: Recovery time is
Maximum Nodes 40 unpredictable if there are unpredictable if there are unpredictable if there are 250 250 Dual-Homing 250
more than 9 nodes) more than 9 nodes) more than 9 nodes)
O-Ring Couple-Ring O-Ring
IGS-3044GC IGS-3044GC
Per VLAN STP NO NO NO YES NO NO NO
Comparison Table of Redundant Technologies
Benefits of ORing's Redundant Technologies
O-Ring : O-Ring is ORing's proprietary redundant ring technology, boasting a recovery time of less than 10
milliseconds and the ability to support up to 250 nodes. The O-Ring redundant ring technology can protect mission-
critical applications from network interruptions or temporary malfunction.

O-Ring Ethernet Protocol
Gigabit Network Link
RGS series CAT5e Optic Fiber IEEE 802.11 WLAN

Dual-Homing

O-Ring Couple-Ring O-Ring
IGS-3044GC IGS-3044GC

Open-Ring : Open-Ring is an enhanced redundant
technology that allows ORing's switches to work with
other vendor's proprietary redundant ring technologies. It
enables ORing's switches to form a single ring with other
vendor's switches. In cases where the ring is deployed
using proprietary technologies, ORing offers a compatibility
service where ORing can make its switches compatible
with your particular network requirements.

MRP *NOTE : All of ORing's Ethernet switches come with Media Rendundancy Protocol (MRP) support.
Ethernet Protocol
Link
MRP is a data network protocol standardized as IEC 62439-2, allowing rings of Ethernet switches to overcome any single
CAT5e
IEEE 802.11 WLAN
Optic Fiber
failure, providing deterministic recovery time and supporting steamless data transmission. Therefore, it is suitable to
most Industial Ethernet applications and in the same time assures the most reliable communication environment.
Modbus TCP : Modbus TCP is simply the Modbus RTU protocol with a TCP interface that runs on Ethernet. Specifically, it
covers the use of Modbus messaging in an 'Intranet' or 'Internet' environment using the TCP protocols. The most common use
of the protocols at this time are for Ethernet attachment of PLC's, I/O modules, and 'gateways' to other simple field buses or I/O
networks. SCADA system can monitor / Control Industrial Ethernet Switch going through Modbus TCP.

RSTP 2004: RSTP-2004 is an enhanced version of RSTP designed to overcome the slow recovery time in certain
situations which might take up to 30 seconds when using RSTP. To speed up the recovery time, some significant
changes have been made and one of them is transmission of the Bridge Protocol Data Unit (BPDU). When a link in the
topology is broken, the device will send out a topology change notice which is encapsulated in the BPDU. Since the
notice is triggered by the event, it can be sent out at a much faster rate, making the protocol faster than RSTP standard.
With a millisecond-level recovery time, RSTP-2004 can provide higher network availability.

*NOTE: This function is available by request only
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