Comtrol ES9528-XT User Guide - Manual (Page 70)

70 - Network Redundancy RocketLinx ES9528 and ES9528-XT User Guide: 2000508 Rev. G
Configuration Using the Web Interface
Network Redundancy
It is critical for industrial applications that the network remains running at all times. The ES9528 supports:
• Standard Rapid Spanning Tree Protocol (STP) and Rapid Spanning Tree Protocol (RSTP)
The ES9528 supports RSTP versions IEEE 802.1D-2004, IEEE 802.1D-1998 STP, and IEEE 802.1w
RSTP.
• Multiple Spanning Tree Protocol (MSTP)
MSTP implements IEEE 802.1s, which uses RSTP for rapid convergence, enables VLANs to be grouped
into a spanning-tree instance, with each instance having a spanning-tree topology independent of other
spanning-tree instances. This architecture provides multiple forwarding paths for data traffic, enables
load balancing, and reduces the number of spanning-tree instances required to support a large number of
VLANs. MSTP was originally defined in the IEEE 802.1s and later merged into the IEEE 802.1Q-2003
specification.
• Redundant Ring
The Redundant Ring features 0 ms for restore and less than 10 ms for fail over for 100BASE-TX copper
ports. Other interfaces may take longer due to media characteristics.
• Rapid Dual Homing (RDH)
Advanced RDH technology allows the ES9528 to connect with a core managed switch easily. 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 pages are included in this group:
• STP Configuration on Page 71
• STP Port Configuration on Page 72
• STP Information on Page 73
• MSTP Configuration on Page 75
• MSTP Port Configuration on Page 78
• MSTP Information on Page 79
• Redundant Ring on Page 81
• Redundant Ring Information on Page 82
Optionally, you can use the CLI to configure these features, see Network Redundancy (CLI) on Page 148.