SNMP trap命令

SNMP Trap是一种消息，用于向管理系统发送事件通知。当特定事件发生时，网络设备可以生成SNMP Trap消息并将其发送到指定的管理系统。以下是使用Java实现SNMP Trap的步骤：

1. 导入必要的库文件

import java.io.IOException;
import java.net.InetAddress;
import java.util.Date;
import org.snmp4j.CommunityTarget;
import org.snmp4j.PDU;
import org.snmp4j.Snmp;
import org.snmp4j.TransportMapping;
import org.snmp4j.event.ResponseEvent;
import org.snmp4j.mp.SnmpConstants;
import org.snmp4j.smi.Address;
import org.snmp4j.smi.GenericAddress;
import org.snmp4j.smi.OID;
import org.snmp4j.smi.OctetString;
import org.snmp4j.smi.UdpAddress;
import org.snmp4j.smi.VariableBinding;
import org.snmp4j.transport.DefaultUdpTransportMapping;

2. 创建SNMP对象

TransportMapping transport = new DefaultUdpTransportMapping();
Snmp snmp = new Snmp(transport);
transport.listen();

3. 创建PDU对象

PDU pdu = new PDU();
pdu.setType(PDU.TRAP);
pdu.add(new VariableBinding(SnmpConstants.sysUpTime, new OctetString(new Date().toString())));
pdu.add(new VariableBinding(SnmpConstants.snmpTrapOID, new OID("1.3.6.1.4.1.8072.9999.9999.1")));
pdu.add(new VariableBinding(SnmpConstants.snmpTrapAddress, new IpAddress("192.168.0.1")));
pdu.add(new VariableBinding(new OID("1.3.6.1.2.1.1.1.0"), new OctetString("Test trap")));

4. 创建CommunityTarget对象

Address targetAddress = GenericAddress.parse("udp:192.168.0.1/162");
CommunityTarget target = new CommunityTarget();
target.setCommunity(new OctetString("public"));
target.setAddress(targetAddress);
target.setVersion(SnmpConstants.version2c);
target.setRetries(2);
target.setTimeout(5000);

5. 发送Trap消息

try {
    snmp.send(pdu, target);
} catch (IOException e) {
    e.printStackTrace();
}