Xpress Ring - WAGO 852-1305 Manual

94 Enhanced Features
MSTP
The MSTP ("Multiple Spanning Tree Protocol") is an RSTP extension. It allows
different spanning tree instances in conjunction with VLANs ("Virtual Local Area
Networks").
For a VLAN or group of VLANs, STP instances can be created independently that
user their own different spanning trees within a LAN.
With the MSTP approach, a root bridge and the lowest path costs between the root
bridge and the root ports offered of the individual bridges are determined. The
root bridge sends Bridge Protocol Data Units (BPDU) to all bridges and
determines the network configuration from the configuration data contained in the
BPDU data packets.
7.2.14

Xpress Ring

The Xpress Ring is a fast-acting, self-healing ring recovery technology that
enables networks to recover from link failure within 50 ms.
Fast Link Recovery and Ring Redundancy are important functions for increasing
the reliability of non-stop systems.
A well-planned network with an Arbiter switch and ring ports can recover from
segment failure within a very short time.
A switch in the Xpress Ring has only two roles: either "Forwarder" or "Arbiter".
There can be only one Arbiter switch while all other switches are "Forwarders".
One of the ring ports of an Arbiter switch is set to the blocking state. If one of the
ring connections fails, the blocked port is set to the forwarding state.
WAGO-ETHERNET-Zubehör 852
852-1305 8/4-Port 100BASE-T/1000BASE-SX/LX
Manual
1.1.0