Network Redundancy; Rstp - Comtrol RocketLinx ES7528 User Manual

Network Redundancy

It is critical for industrial applications that the network remains running at all times. The RocketLinx ES7528 supports:
• Standard Rapid Spanning Tree Protocol (STP and RSTP)
The RocketLinx ES7528 supports RSTP versions 802.1D-2004, 802.1D-1998 STP, and 802.1w RSTP.
• Redundant Ring
Redundant Ring features 0 ms for restore and about 5 ms for fail over for copper.
• Rapid Dual Homing (RDH)
Advanced RDH technology facilitates the RocketLinx ES7528 to connecting with a core managed switch easily and
conveniently. With RDH technology, you can also couple several Rapid Super Rings or RSTP groups together, which is
also known as Auto Ring Coupling.
The following commands are included in this group:
• on Page 69

RSTP

• on Page 71
RSTP Information
• on Page 72
Redundant Ring
•
Redundant Ring Information
•
Command Lines for RSTP
RSTP
If a switch has more than one path to a destination, it leads to
message loops that can generate broadcast storms and quickly
bog down a network.
The spanning tree was created to combat the negative effects
of message loops in switched networks. A spanning tree uses a
spanning tree algorithm (STA) to automatically sense whether
a switch has more than one way to communicate with a node.
It then selects the best path (primary), and blocks the other
paths. It also keeps track of the blocked paths in case the
primary path fails. Spanning Tree Protocol (STP) introduced a
standard method to accomplish this. It is specified in IEEE
802.1D-1998. Later, Rapid Spanning Tree Protocol (RSTP)
was adopted and represents the evolution of STP, providing
much faster spanning tree convergence after a topology
change. This is specified in IEEE 802.1w. In 2004, 802.1w is
included into the 802.1D-2004 version. This switch supports
both RSTP and STP (all switches that support RSTP are also
backward compatible with switches that support only
STP).This page allows you to enable/disable RSTP, configure
the global setting and port settings.
Network Redundancy
on Page 74
on Page 75
RocketLinx ES7528 Industrial Managed PoE Rack Mount User Guide: 2000509 Rev. A - 69
Network Redundancy