Management; Snmp - WAGO 852-1305 Manual

108 Enhanced Features
7.5

Management

7.5.1

SNMP

The SNMP ("Simple Network Management Protocol") is used in network
management systems to monitor the state of attached devices that require the
attention of an administrator. SNMP is a component of the "Internet Protocol
Suite" defined by the IETF ("Internet Engineering Task Force"). It consists of a
set of standards for network management, including an application layer protocol,
a database schema and a set of data objects.
SNMP provides management data in the form of variables on the managed
systems, which describe the system configuration. These variables can then be
queried (and sometimes changed) by managing applications.
Support for MIBs
- RFC 1157 A Simple Network Management Protocol
- RFC 1213 MIB-II
- RFC 1493 Bridge MIB
- RFC 1643 ETHERNET Interface MIB
- RFC 1757 RMON Group 1,2,3,9
An "SNMP Community String" is a text string that acts as a password. It is used
to authenticate messages that are sent between the management station (the
SNMP manager) and the device (the SNMP agent). The string is included in every
packet transmitted between the SNMP manager and the SNMP agent.
The "SNMP Community" acts like a password and is used to define the security
parameters of SNMP clients in an SNMP v1 and SNMP v2c environments. The
default "SNMP Community" is "public" for both SNMPv1 and SNMPv2c before
SNMPv3 is enabled. Once SNMPv3 is enabled, the "Communities" of SNMPv1
and v2c have to be unique and cannot be shared.
Network ID of "Trusted Host":
The IP address is a combination of the network ID and host ID.
•
•
Community String
It should allow users to configure the "Community String" and rights only.
A user configures the "Community String" and rights and the network ID of the
"Trusted Host" = 0.0.0.0, subnet mask = 0.0.0.0, i.e., all hosts with this
"Community String" can access the switch.
Network ID = (Host IP and mask).
A user must enter the network ID only and leave the host ID at "0". If a
user enters a host ID such as 192.168.1.102, the system resets the host
ID to 192.168.1.0.
WAGO-ETHERNET-Zubehör 852
852-1305 8/4-Port 100BASE-T/1000BASE-SX/LX
Manual
1.1.0