|
QUESTION:
Which variables are supported by SNMP or by SIMATIC NET?
ANSWER:
In the following is an overview of possible functions/variables of
SNMP (MIB II) that are significant for monitoring the device
status:
sysDescr
sysName
sysLocation
sysUpTime
|
Designation
|
Access rights
|
Description
|
|
sysDescr
|
read only
|
A string of up to 256 characters is used. This value contains
the name and version Ids, the software operating system and network
type, i.e. for an OSM, for example, OSM TP62, and for a CP343-1 the
S7300 station.
|
|
sysObjectID
|
read only
|
Output of the object identifier under which the component is to
be reached in the Siemens MIB tree:
"1.3.6.1.4.1.4329.6.2.nnn.mmm"
If no private OIDs have been declared, then the object identifier
[0,0].
The value 0 is preset here.
|
|
sysUpTime
|
read only
|
Counter in hundredths of a second after the last reset (e.g.
after Power Up).
The value is preset here.
|
|
sysContact
|
read and write
|
Provided by the network manager (default: empty).
Possible value is a string of up to 256 characters.
|
|
sysName
|
read and write
|
Provided by the network manager – in compliance with convention
of the full-qualified domain name. Default: empty
Possible value is a string of up to 256 characters.
|
|
sysLocation
|
read and write
|
Provided by the network manager (default: empty). Describes
location of the device - preset.
Possible value is a string of up to 256 characters.
|
|
sysService
|
read only
|
Displays the set of services that are provided by the component
as per ISO/OSI model.
Level functionality:
- physical (e.g. repeater)
- data link/subnetwork (e.g. bridges, switches)
- Internet (e.g. IP gateways, routers)
- end to end (e.g. IP hosts)
- applications (e.g. e-mail server)
The value is a preset integer 32 bit.
|
Table 1: System Group Parameters
ifNumber
ifDescr
ifType
ifSpeed
ifOperStatus
ifLastChange
ifInErrors
ifOutErrors
|
Designation
|
Access rights
|
Description
|
|
ifNumber
|
read only
|
Number of different interfaces available in the component.
Generally only one interface is available in SIMATIC NET. A total
number is given even if not all the interfaces are ready for
operation. An interface is, for example, the Ethernet connection of
a CP to the TCP/IP batch. Another interface would be, for example,
the IP path "local host".
The value is a preset integer 32 bit.
|
|
ifDescr
|
read only
|
This value includes information about the interface. This string
should contain the name of the manufacturer, the product name and
the version of the interface.
Example with CP343-1:
SIEMENS SIMATIC NET CP343-1 6GK7343-1EX20-0XE0 HW: Version 1 FW:
Version 1.1.10 Fast Ethernet Port 1 Rack 0 Slot 4
A string of up to 265 characters is used.
|
|
ifType
|
read only
|
The value "ethernet-csmacd(6)" is entered for SIMATIC NET.
Other possible values:
other(1), -- none of the following
regular1822(2),
hdh1822(§),
ddh-x25(4),
rfd977-x25(5),
ethernet-xsmacs(6),
iso88023-csmacd(7),
iso88024-tokenBus(8),
iso88025-tokenRing(9),
iso88026-man(10),
starLan(11),
proteon-10Mbit(12),
hyperchannel(14),
fddi(15),
lapb(16),
sdlc(17),
dsl(18), -- T-1
el(19), -- the European version of T-1
basicISDN(20),
primaryISDN(21), -- system-specific, serial interface
propPointToPointSerial(22),
ppp(23),
softwareLoopback(24),
con(25), -- CLNP via IP
ethernet-3Mbit(26),
nsip(27), -- KNS via IP
slip(28), -- generic SLIP
ultra(29), -- ULTRA Technologies
ds3(30), -- T-3
sip(31), -- SMDS
frame-relay(32)
The value is a preset integer.
|
|
ifSpeed
|
read only
|
Estimated value over the nominal bandwidth of the interface in
bits per second. In SIMATIC NET either 10 Mbit/s or 100 Mbit/s
displayed.
The value is of the data type "Gauge".
|
|
ifOperStatus
|
read only
|
Value from list:
up(1),
down(2),
testing(3),
Current operating state of the interface is given here.
The state "testing(3)" indicates that no user data is being
transported.
The value is a preset integer.
|
|
ifLastChange
|
read only
|
Counter in hundredths of a second. Counts how long the interface
has had its current operating state.
If the state was reached before the last reinitialization by the
SNMP manager, then the value is zero.
The preset value is of the data type "TimeTicks".
|
|
ifInErrors
|
read only
|
Counter of the packages which have been received but not
forwarded to the higher protocol levels because of detected
errors.
The preset value is of the data type "Counter".
|
|
ifOutErrors
|
read only
|
Counter of the packages that have not been sent because of an
error.
The preset value is of the data type "Counter".
|
Table 2: Interface Group Parameters
|
german
