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11-3
11 SNMP Agent
CJ-series EtherNet/IP Units Operation Manual for NJ-series CPU Unit (W495)
11-1 SNMP Ag
ent
11
11-1-2
S
p
ecifications
When a failure or some other specific problem occurs, a status report called a trap is sent. This enables
monitoring changes in status even if the SNMP manager does not monitor the EtherNet/IP Unit period-
ically. However, traps use UDP. Therefore, you cannot check to see if the SNMP manager receives traps
from the EtherNet/IP port. Thus, depending on the network status, some traps may not reach the
SNMP manager.
The structure of SNMP messages is as follows:
SNMP Traps
11-1-2 Specifications
Item
Specification
Protocol
SNMP
Agent
SNMPv1, SNMPv2c
MIB
MIB-II
Port No.
SNMP agent: 161 (UDP)
SNMP trap: 162 (UDP)
These can be changed in the EtherNet/IP Unit Settings from the Sysmac Studio.
Timing of SNMP trap opera-
tion
Status reports are sent to the SNMP manager at the following times.
•
When the Controller is turned ON
•
When links are established
•
When an SNMP agent fails to be authorized
Supported MIB commands
GetRequest/GetNextRequest
11-1-3 SNMP Messages
Item
Set value
Version
This value gives the SNMP version.
SNMPv1: 0
SNMpv2c: 1
Community
Community name for verification
PDU
This depends on the PDU type.
MIB
EtherNet/IP Unit
Controller power supply
turned ON.
SNMP manager
Trap
SNMP agent
MAC header
IP header
UDP header
SNMP message
Variable length (1,472 bytes max.)
Version
Community
PDU
Содержание SYSMAC CJ1W-EIP21
Страница 8: ...Manual Structure 6 CJ series EtherNet IP Units Operation Manual for NJ series CPU Unit W495...
Страница 10: ...Sections in this Manual 8 CJ series EtherNet IP Units Operation Manual for NJ series CPU Unit W495...
Страница 20: ...Read and Understand this Manual 18 CJ series EtherNet IP Units Operation Manual for NJ series CPU Unit W495...
Страница 42: ...Revision History 40 CJ series EtherNet IP Units Operation Manual for NJ series CPU Unit W495...
Страница 68: ...1 Introduction 1 26 CJ series EtherNet IP Units Operation Manual for NJ series CPU Unit W495...
Страница 80: ...2 Installing Ethernet Networks 2 12 CJ series EtherNet IP Units Operation Manual for NJ series CPU Unit W495...
Страница 130: ...6 Testing Communications 6 4 CJ series EtherNet IP Units Operation Manual for NJ series CPU Unit W495...
Страница 206: ...7 Tag Data Link Functions 7 76 CJ series EtherNet IP Units Operation Manual for NJ series CPU Unit W495...
Страница 246: ...8 Message Communications 8 40 CJ series EtherNet IP Units Operation Manual for NJ series CPU Unit W495...
Страница 266: ...9 FTP Server 9 20 CJ series EtherNet IP Units Operation Manual for NJ series CPU Unit W495...
Страница 374: ...13 Troubleshooting 13 56 CJ series EtherNet IP Units Operation Manual for NJ series CPU Unit W495...
Страница 431: ...Index 1 CJ series EtherNet IP Units Operation Manual for NJ series CPU Unit W495 I Index...
Страница 436: ...Index 6 CJ series EtherNet IP Units Operation Manual for NJ series CPU Unit W495 Index...
Страница 437: ......