FL NAT SMN 8TX(-M)
4-36
PHOENIX CONTACT
7966_en_04
SNMP interface
All managed Factoryline components have an SNMP agent. This agent of a device
manages Management Information Base II (MIB 2) according to RFC1213, RMON MIB,
bridge MIB, If MIB, Etherlike MIB, SNMPv2 MIB, SNMP FRAMEWORK MIB, P bridge MIB,
Q bridge MIB, RSTP MIB, LLDP MIB, and private SNMP objects from Phoenix Contact
(FL SWITCH M MIB).
Network management stations can read and modify configuration and diagnostic data from
network devices via the Simple Network Management Protocol. In addition, any SNMP
tools or network management tools can be used to access Factoryline products via SNMP.
To do this, the MIBs supported by the relevant device must be made available to the SNMP
management tools.
On the one hand, these are globally valid MIBs, which are specified and described in RFC
(Request for Comments) standards. This includes, for example, MIB2 according to
RFC1213, which is supported by all SNMP-compatible network devices. On the other hand,
manufacturers can specify their own SNMP objects, which are then assigned to a private
manufacturer area in the large SNMP object tree. Manufacturers are then responsible for
their own private (enterprise) areas, i.e., they must ensure that only one object is assigned
to an object ID (object name and parameters) and can be published. If an object is no longer
needed, it can be labeled as “expired”, but it cannot be reused with other parameters under
any circumstances.
Phoenix Contact provides notification of ASN1 SNMP objects by publishing their
descriptions on the Internet.
Reading SNMP objects is not password-protected. However, a password is required for
read access in SNMP, but this is set to “public”, which is usual for network devices, and
cannot be modified. By default upon delivery, the password for write access is “private” and
can be changed by the user.
Another benefit for the user is the option of sending traps using the Simple Network
Management Protocol.
Management Information Base (MIB)
Database which contains all the data (objects and variables) required for network
management.
Agent
An agent is a software tool, which collects data from the network device on which it is
installed, and transmits this data on request. Agents reside in all managed network
components and transmit the values of specific settings and parameters to the
management station. On a request of a manager or on the occurrence of a specific event,
the agent transmits the collected information to the management station.
Traps
Traps are spontaneous SNMP alarm or information messages that are sent by an SNMP-
compatible device when specific events occur. Traps are transmitted with maximum priority
to various addresses (if required) and can then be displayed by the management station in
plain text. The IP addresses that are to receive these traps (trap targets/receivers) must be
set by the user on the relevant device. The following traps are sent when required:
SNMP, the web interface, and the serial terminal all use the same password, which can
be changed by the user.