snmpstatus -v 1 -c public 192.168.40.135
snmpstatus -v 2c -c public 192.168.40.135
snmpstatus -v 3 -c public 192.168.40.135
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SNMP设备是否启动
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网络端口权限是否开通
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community是共同体的名称不正确（community由SNMP设备设置）
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协议版本，SNMP设备不支持
zabbix监控告警Received empty response from Zabbix Agent Assuming that agent dropped connection
zabbix监控告警Received empty response from Zabbix Agent Assuming that agent dropped connection错误 查看zabbix-server日志 修改zabbix配置把主机127.0.0.1修改成本地的真实ip地址即可
Received empty response from Zabbix Agent at [192.168.1.106]. Assuming that agent dropped connection
将zabbix主机界面中端点代理程式的介面中IP修改为127.0.0.1
