GE S2020 User Manual

Chapter 4 – Functions
GE Reason Switches
106
REASON SWITCHES-TM-EN-3
Figure 66: PTP network
As shown in the previous figure, there are several elements in the PTP network. The
main elements in a PTP-aware environment are:
 Grand Master Clock (GMC): This clock is the top-level master at the network,
usually a GPS-based clock. Atomic clocks can also be used as Grand master
at a PTP network;
 Master Clock (MC): A master clock at a given subdomains, which can be the
GMC clock or the boundary clock;
 Ordinary Clock (OC): A clock in the PTP network, which can be either master
or a slave clock. If the ordinary clock is a master clock, it can be the master
or the grand master clock of the network;
 Transparent Clock (TC): A clock that forwards Sync messages with value of
the forwarding process delay included at the message;
 Boundary Clock (BC): A clock that has a slave port synchronized by a master
clock and a master port which synchronizes a time sub-domain;
 Hybrid Clock (HC): A clock that operates as Boundary and Transparent
clocks.

The PTP operation over the network is as shown below.

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