User manual
Table Of Contents
- Industrial Ethernet OSM/ESM Network Management
- Safety-Related Notices
- Contents
- Preface
- Introduction
- Important OSM/ESM Functions
- 2.1 Autonegotiation
- 2.2 Autocrossover
- 2.3 Transmission Rate and Duplicity
- 2.4 Factory Defaults and Protected Settings
- 2.5 Filtering Database (FDB Table)
- 2.6 Locked Ports
- 2.7 Mirroring
- 2.8 Traps
- 2.9 E-Mail Function
- 2.10 Event Log Table
- 2.11 Time of Day and Time- of - day Synchronization
- 2.12 Flow Control
- 2.13 BOOTP/DHCP
- 2.14 IP Configuration Using SIMATIC NET NCM PC, SIMATIC STEP 7 or the Primary Setup Tool
- 2.15 TELNET
- 2.16 Extended Redundant Configuration
- 2.17 Observer Function
- 2.18 Automatic Download of the Configuration
- Command Interpreter (CLI)
- Web-Based Management (WBM)
- 4.1 General Introduction
- 4.1.1 Restricted Functionality of the OSM/ESM Variants
- 4.2 Requirements
- 4.3 Connecting
- 4.4 Access Using Web-Based Management
- 4.5 User Interface of Web-Based Management
- 4.6 Management Menus
- 4.7 System
- 4.8 OSM/ESM Status
- 4.9 Agent Features
- 4.10 Switch Features
- 4.11 Port Status
- 4.12 Statistics Counters
- SNMP and RMON
- Upgrading/Downloading Software
- Notes on Troubleshooting
- Internet Browser Settings
- Connecting a PC with Hyperterminal to the Serial Port of the OSM/ ESM
- References
- Abbreviations/Acronyms
- Glossary
- Index
Introduction
1-3
Industrial Ethernet OSM/ESM Network Management
C79000-G8976-C137-08
1.1.2 Communication
Protocol
SNMP uses the connectionless protocol UDP (User Datagram Protocol).
Getting Information
To read the required status information, the manager sends a Get request to the
agent of the device. The addressed component answers the request with a
Response message.
Making Settings
To change the current configuration of a managed device, the manager sends a
Set request.
Status changes can be notified to the manager event-driven and without polling by
the agent sending a Trap message.
Management
Application
UDP
IP
Network Layer
SNMP Manager
SNMP Managed
Object
UDP
IP
Network Layer
SNMP Agent
SNMP
Messages
Figure 1-1 SNMP Communication