Delta DVS Series User Manual

Chapter 3 Featured Functions
3.3 Network Redundancy
In some network environments, users need to set up redundant loops in the network to provide a
backup path for disconnection or network device breakdown. But if there are many network devices
in the network, then each host needs to spend more time and cross many network devices to
associate with each other. And sometimes the disconnection happens in a busy network, so the
network must recover in a short time. Setting up redundancy on your network helps protect critical
links against failure, protects against network loops, and keeps network downtime at a minimum.
For example, if the Delta switch is used as a key communications component of a production line,
several minutes of downtime may cause a big loss in production and revenue.
IMPORTANT:
Make sure that you save the configuration in the Save
Configuration page after you have applied the configuration
changes. (Save ConfigSave Configuration) If you don’t
save the configuration, then the configuration will be cleared
after the switch is rebooted.
3.3.1 STP
Spanning Tree Protocol (STP) provides a tree topology to help reduce link failure in a network, find
one path between end devices and protect loops in the network. Bridge Protocol Data Unit (BPDU)
includes the calculation of information and it is used to negotiate between switches and establish
STP. STP is a bridge based system and it defines 5 kinds of port statuses: blocking, listening,
learning, forwarding and disabling. If the status of blocking changes to forwarding, STP needs to
spend more than 30 seconds.
Rapid Spanning Tree Protocol (RSTP) was defined by IEEE in 2001. RSTP provides faster tree
convergence after a topology changes. Sometimes it only needs to spend a few hundred
milliseconds. And RSTP can backward compatible with standard STP.
Delta switch supports different protocols to support communication redundancy. When configuring a
redundant ring, all switches on the same ring must be configured to use the same redundant
protocol.
STP/RSTP can let you establish a redundant ring and protect the loop in a network.
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Delta DVS Series Specifications

General

Brand	Delta
Model	DVS Series
Category	Switch
Language	English

Summary

Chapter 1 Introduction

1.1 Feature

Covers product features like high performance, reliability, and robust design.

1.2 SFP Module Installation

Instructions for inserting and removing SFP modules.

1.3 Package Checklist

Lists the items included in the product package.

Chapter 2 User Interface Introduction

2.1 USB Console Configuration

Details connecting and configuring the switch via USB.

2.2 Telnet Console Configuration

Explains how to configure the switch using Telnet.

2.3 Web Browser Configuration

Describes using the web interface for configuration.

Chapter 3 Featured Functions

3.1 Basic Setting

Covers fundamental settings including system info, network interfaces, port config, DHCP, DNS, and management.

3.3 Network Redundancy

Explains Spanning Tree Protocol (STP) for network reliability and loop prevention.

3.4 Virtual LANs

Details configuring VLANs to segment the network, manage traffic, and enhance security.

3.11 Security Settings

Provides options for securing the switch, including MAC address, IP address, and port authentication.

3.12 Monitoring Settings

Offers tools to monitor switch status, system CPU, interfaces, RMON, SYSLOG, and diagnostics.

3.18 Troubleshooting

Guides on diagnosing and resolving network connectivity issues using Ping and Traceroute functions.

Chapter 4 IEXplorer Utility Introduction

4.1 Starting the Configuration

Instructions on launching and using the IEXplorer utility for device management.

4.3 Settings

Details how to configure devices via Device Configuration or the web interface using IEXplorer.

Appendix A Private MIB Group

A.1 Private MIB Group

Information on private MIBs for SNMP management.

Appendix B MODBUS TCP Map

B.1 Modbus/TCP Map

Provides a map of Modbus TCP registers and their descriptions.