Westermo PMI-110-F2G - Manual (Page 78)

Click “Reload“ to reload the MSTP information display .
4.5.7 Multiple Super Ring (MSR)
The most common industrial network redundancy is to form a ring or loop.
Typically, the managed switches are connected in series and the last switch is
connected back to the first one. In such connection, you can implement Multiple
Super Ring technology to get fatest recovery performance.
Multiple Super Ring (MSR) technology have a fast restore and failover time, 0 ms
for restore and about milliseconds level for failover for 100Base‐TX copper port.
The other interface may take longer time due to the media characteristics.
Advanced Rapid Dual Homing (RDH) technology also facilitates PMI Managed
Switch to connect with a core managed switch easily and conveniently. With RDH
technology, you can also couple several Rapid Super Rings or RSTP cloud together,
which is also known as Auto Ring Coupling.
TrunkRing technology allows integrate MSR with LACP/Port Trunking. The
LACP/Trunk aggregated ports is a virtual interface and it can work as the Ring port
of the MSR.
MultiRing is an outstanding technology. Multiple rings can be aggregated within
one switch by using different Ring ID. The maximum Ring number one switch can
support is half of total port volume. For example, the PMI‐110‐F2G is a 10 port
Ethernet Switch design, which means maximum 5 Rings (4 100Mbps + 1 Gigabit
Rings) can be aggregated in one. The feature saves much effort when
74