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
SNMP and RMON
5-3
Industrial Ethernet OSM/ESM Network Management
C79000-G8976-C137-08
5.2 RMON
A RMON-compliant device (RMON = Remote MONitoring) allows you to collect
special diagnostic data on the device, to prepare this data and to read it out via
SNMP at a network management station that supports RMON. This diagnostic
data such as port-related load allows you to detect network problems early and to
eliminate them. These are stored on the OSM/ESM in the RMON MIB.
RMON functionality is defined in RFC 1757 and is divided into groups. All
OSMs/ESMs with the exception of OSM TP22 and ESM TP40 support the four
RMON groups Statistics, History, Alarm and Event.
The following table summarizes the options provided by these four groups.
Table 5-1 RMON Groups and Their Functionality
RMON Group
Description
Statistics This provides statistical information for each OSM/ESM port such as
packet rate, packet distribution, number of broadcast, multicast,
unicast packets, number of received bad packets sorted according to
error types.
History This RMON group allows specific statistical information on the
OSM/ESM to be selected, queried at periodic intervals and stored.
You can read out this information at a management station later and
display it in chronological order (for example the chronological order
of the error rate).
Alarm The alarm group also queries certain statistical values periodically
and compares them with limit values configured previously on the
OSM/ESM by the management station. If a limit value is violated, an
alarm is generated and a trap is issued. The alarm group is only
possible when the event group is supported.
Event The event group controls generation of traps when RMON alarms
occur.