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Options List
C.19.4
SNMP Support
This section reviews in some more detail SNMP on the Model 1084A/B/C. Simple Network Man-
agement Protocol (SNMP) was created to provide a standard for managing different networks and
the devices on the networks. As such, SNMP is designed to operate on the application layer using
different transport protocols (e.g. TCP/IP and UDP), making it independent of network hardware.
SNMP operates on this basis in the Model 1084A/B/C.
An SNMP managed network consists of three components: A managed device, an agent and
a network-management system (NMS). The 1084A/B/C is a managed device running an SNMP
agent that responds to queries from the network-management system.
SNMP Version Information
Currently, there are three versions of SNMP defined: SNMP v1, v2 and v3. The Model 1084A/B/C
supports these three versions. Here are some differences between versions.
SNMP v1. Basic Operations and Features
•
GetUsed by the NMS to retrieve the value of one or more object instances from and agent.
•
GetNextUsed by the NMS to retrieve the value of the next object instance in a table or a list
within an agent.
•
SetUsed by the NMS to set the values of the object instances within an agent.
•
TrapUsed by agents to asynchronously inform the NMS of a significant event.
SNMP v2. Additional Operations and Features
•
GetBulkUsed by the NMS to efficiently retrieve large blocks of data.
•
InformAllows one NMS to send trap information to another NMS and to then receive a
response.
SNMP v3. Security Enhancement
•
User-based Security Model (USM) for SNMP message security.
•
View-based Access Control Model (VACM) for access control.
•
Dynamically configure the SNMP agents using SNMP SET commands.
Management Information Base (MIB) Table
Object names are stored in a (MIB) table that reside on a computer, and correspond to values in
a managed device (the 1084A/B/C). The agent in the Option 34 will respond to queries from the
management program to return values of these objects. The management program may also be
able to configure some settings in the Model 1084A/B/C. See Section C.19.4 for a print out of the
current MIB table. To obtain a soft copy of the MIB table for the Model 1084A/B/C, you may
download it from the Arbiter Systems website at the following address: www.arbiter.com.
SNMP Service
Descriptions that follow are based on the web interface. The SNMP service (agent) runs on the
Option 34 when enabled in the configuration. Figure C.33 illustrates the SNMP Status screen,
Содержание 1084A
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Страница 18: ...xviii LIST OF FIGURES ...
Страница 23: ...1 4 Attaching Rack Mount Ears to 1084A B C Series Clocks 3 Figure 1 2 Attaching Rack Mount Ears ...
Страница 24: ...4 Unpacking the Clock ...
Страница 36: ...16 Connecting Inlet Power Input and Output Signals ...
Страница 39: ...4 1 GPS Antenna Installation 19 Figure 4 2 Antenna Mounting Bracket Figure 4 3 Antenna Mounting with AS0044600 ...
Страница 44: ...24 GPS Antenna and Cable Information ...
Страница 114: ...94 Startup and Basic Operation ...
Страница 123: ...B 4 Physical Dimensions 103 Figure B 1 Suggested Mounting of the AS0094500 Surge Arrester ...
Страница 124: ...104 Using Surge Arresters ...
Страница 134: ...114 Options List C 6 2 Option 06 Firmware Setup Figure C 3 Option 06 Firmware Setup ...
Страница 142: ...122 Options List Figure C 5 Option 06 Output Jumper Settings ...
Страница 143: ...C 6 Option 06 Parallel BCD Output 1 millisecond Resolution 123 Figure C 6 Option 06 Board Layout and Jumper Locations ...
Страница 157: ...C 10 Option 17 Parallel BCD Output and Second RS 232C Port 137 Figure C 12 Option 17 Output Jumper Settings ...
Страница 158: ...138 Options List Figure C 13 Option 17 Board Layout and Jumper Locations ...
Страница 163: ...C 13 Option 20A Four Fiber Optic Outputs 143 Figure C 14 Option 20A Jumper Locations ...
Страница 170: ...150 Options List Figure C 16 Option 23 Internal Jumper Setup ...
Страница 172: ...152 Options List Figure C 17 Option 27 Jumper Locations ...
Страница 190: ...170 Options List Figure C 20 Option 29 Connector Signal Locations ...
Страница 246: ...226 Options List ...