Chapter 4. Web Configuration & Operation
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CHAPTER 4
WEB OPERATION & CONFIGURATION
4.7 Redundancy
Designing redundant paths that can protect networks from unexpected failovers is extremely important in mission-
critical networks that need to provide uninterrupted services. However, redundant paths mean that possible loops
may occur in networks and bring down networks eventually if they are not treated carefully. In practice, several loop
protection methods are implemented to ensure that networks function normally without loops and recover as soon as
possible when a point of failure occurs. The most popular ones are STP (802.1d), RSTP (802.1w) and MSTP (802.1s).
For industrial applications, the proprietary u-Ring and ERPS (G.8032) are highly recommended since they can achieve
faster recovery time than any STP protocol.
In this section, the redundancy-related functions will be introduced individually. The functions covered in this section
can be seen from the “Redundancy” menu.
4.7.1 u-Ring
u-Ring is a proprietary redundancy technology that supports 250 units in a ring topology and can bring redundant
paths into service within 10 ms when link failures occur. Compared with spanning tree protocol, u-Ring achieves faster
recovery time on the network and is more flexible and scalable in network architecture. u-Ring redundancy
technology can automatically self identifies the ring Master (the user-defined Master is also supported) and then block
a port resided in Master device for backup purposes. Once the disconnection is detected on the network, u-Ring can
bring backup ports back into “forwarding” mode so that the disconnected path can keep contact with the whole
network.
For more information about u-Ring configurations, please see
Appendix A: u-Ring Configuration Procedure
4.7.1.1 Configuration
Click “Add New Instance” button to add a new entry.
Instance:
The instance number. The total instances supported are 10.
Type:
u-Ring supports 3 ring types. They are explained below individually.
Summary of Contents for IFS-1604GSM Series
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