Phoenix Contact FL SWITCH 2005, Руководство пользователя, Страница: 64 / 98

FL SWITCH 2000
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PHOENIX CONTACT 107065_en_01
is assigned to an object ID 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 circum-
stances.
Phoenix Contact provides notification of ASN1 SNMP objects by publishing their descrip-
tions 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 can-
not be modified. By default upon delivery, the password for write access is “private” and can
be changed by the user.
Use of SNMPv3
When using SNMPv3, several points must be observed when accessing the SNMP objects.
In contrast to SNMPv2, SNMPv3 is a secure protocol via which the message content and
the passwords are transmitted in encrypted form.
To use SNMPv3, the switch must first be configured accordingly (see “Service” on page 40).
In addition, you need to change the MIB browser to SNMPv3 and create an SNMPv3 user
with the following parameters:
- MD5 as the algorithm for authentication
- DES as the algorithm for privacy
- User name: “admin”
- Password: current device password (Note: the password must be at least 8 characters
long. If the default password is “private”, “private_” must be used for access.).
Another benefit for the user is the option of sending traps using the Simple Network Man-
agement Protocol.
Management Information Base (MIB)
Description which contains all the data (objects and variables) required for network man-
agement.
Agent
An agent is a software tool which collects data from the network device on which it is in-
stalled and transmits this data on request. Agents reside in all managed network compo-
nents and transmit the values of specific settings and parameters to the management sta-
tion. On a request of a manager or on the occurrence of a specific event, the agent transmits
the collected information to the management station.
The descriptions of the individual SNMP objects are located in the respective MIBs and can
be downloaded from the Phoenix Contact e-shop. Note that the MIB is located in a firm-
ware’s respective software package (zip file).
SNMP and the web interface use the same password, which can be changed by the user.
Not all devices support all object classes. If an unsupported object class is requested, an
error message is generated. If an attempt is made to modify an unsupported object class,
an error message is also generated.