GE S2020 User Manual

Chapter 4 – Functions
GE Reason Switches
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REASON SWITCHES-TM-EN-3
NTP (Network Time Protocol) is a networking protocol used to synchronize the clock
of equipment over packet-switched data networks, which suits the Application Layer
on the OSI model. The protocol works in a client-server mode, and it synchronizes the
devices in network within a few milliseconds of accuracy referred to the UTC time.
The current version (NTP version 4) is standardized by RFC 5905.
Figure below shows the basics of the NTP protocol
Figure 6: NTP Time Protocol Mechanism
The Reason Switches can have the internal clock synchronized by up to five NTP time
servers. Time information is used by some protocols, such as syslog, to timestamp
the messages. In power system applications, the general time server is a GNSS
synchronized clock (Stratum 0 precision).
1.4 Time zone
The internal clock of Reason Switches can be synchronized using NTP protocol, which
sends the UTC time (Greenwich Mean Time). When using the equipment in other
regions, the timezone may be set manually to correct the internal clock
The switches can also be configured to correct the internal clock related to the
Daylight Saving Time (DST). If used, the year, month, date, hour and minutes to start
and end the DST shall be defined.
1.5 Log
The log function is a file that records information of a running operating system or
software at a device. Many applications use this for analysis purposes, as it keeps

GE S2020 Specifications

General

Brand	GE
Model	S2020
Category	Switch
Language	English

Summary

Chapter 1: Introduction

Product Scope

Key Features

Lists the main features of the GE Reason Switches, including hardware-based packet transmission and various protocols.

Chapter 2: Safety Information

Health and Safety

Outlines essential safety information for handling the equipment, emphasizing qualified personnel.

Installation, Commissioning and Servicing

Provides detailed instructions and safety precautions for installing, commissioning, and servicing the equipment.

Chapter 4: Functions

Security

Covers essential security configurations, management access control, and available interface protocols.

Loop Protection

Spanning Tree Protocol

Quality of Service (QoS)

Details traffic prioritization mechanisms using CoS bits (802.1Q) and DSCP over IP traffic.

Precision Time Protocol (PTP)

Describes the Precision Time Protocol for microsecond synchronization in networked measurement and control systems.

Chapter 7: Configuration

System Management Setting

Security Settings

Details managing basic security settings, users, SSH, HTTPS access, and SNMP settings.

VLAN Settings

Details configuring Virtual LANs to segregate broadcast domains and manage traffic.

QoS Settings

Covers Quality of Service configurations using CoS, DSCP, port classification, policing, scheduling, and shaping.

PTP Settings

Chapter 8: Monitoring

Security

Spanning Tree

Chapter 9: Installation

Mounting

Power Connections

Chapter 10: Maintenance and Troubleshooting

Network Diagnostics

Troubleshooting

Describes common issues like power LED status, IP address loss, web interface access problems, and link issues.

Chapter 11: Technical Specifications

Power Supply

RJ45 Ethernet (10/100/1000 Mbps) Port