SNMP 的原理跟概念 分為 Agent 與 Client 兩端需要處理，如果不是提供機器與服務的，就不需要做 Agent 這個 Server，一般最基本的 SNMP 程式設計是撰寫 SNMP Client，Client 又有兩個部份 (1) SNMP GET, Walk (2) Trap Receiver，以下以 snmp4j 套件提供第一個部份 SNMP GET, Walk 的範例。
SNMP GET
給予 server ip，這邊刻意將程式區分為 connect, snmpget, close 三個部份，因為 UDP 本身是 connection less 的一種網路連線，未來在使用時，只要連結起來，應該就能持續發送 SNMP GET，並取得結果。
snmpGet 有兩種 method，第一種就單純地只接受一個 oid 參數，第二種，是接受一個 oid List，可一次查詢多個 oid 的結果。
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Vector;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.snmp4j.CommunityTarget;
import org.snmp4j.PDU;
import org.snmp4j.Snmp;
import org.snmp4j.event.ResponseEvent;
import org.snmp4j.mp.SnmpConstants;
import org.snmp4j.smi.GenericAddress;
import org.snmp4j.smi.Integer32;
import org.snmp4j.smi.Null;
import org.snmp4j.smi.OID;
import org.snmp4j.smi.OctetString;
import org.snmp4j.smi.Variable;
import org.snmp4j.smi.VariableBinding;
import org.snmp4j.transport.DefaultUdpTransportMapping;
public class SnmpGet {
public static Logger logger = LoggerFactory.getLogger(SnmpGet.class
.getName());
private static int version = SnmpConstants.version1;
private static String protocol = "udp";
private static CommunityTarget target = null;
private static DefaultUdpTransportMapping udpTransportMapping = null;
private static Snmp snmp = null;
public static void main(String[] args) {
String ip = "192.168.1.8";
String community = "public";
int port = 161;
Variable var = null;
SnmpGet tester = new SnmpGet();
// tester.snmpGet(ip, port, community, oidval);
try {
tester.connect(ip, port, community);
// System Uptime(系統運行時間) 的 oid, 最前面的 . 可以忽略不寫
String oid = ".1.3.6.1.2.1.1.3.0";
var = tester.snmpGet(oid);
logger.info(oid + " = " + var);
Thread.sleep(3 * 1000);
logger.info("");
oid = ".1.3.6.1.2.1.1.1.0";
var = tester.snmpGet(oid);
logger.info(oid + " = " + var);
Thread.sleep(3 * 1000);
logger.info("");
logger.info("SNMP GetList");
List<String> oidList = new ArrayList<String>();
oidList.add(".1.3.6.1.2.1.1.1.0");
oidList.add(".1.3.6.1.2.1.1.3.0");
oidList.add(".1.3.6.1.2.1.1.5.0");
List<VariableBinding> vblist = tester.snmpGet(oidList);
for (VariableBinding vb : vblist) {
logger.info("oid:" + vb.getOid() + ", var=" + vb.getVariable());
}
} catch (Exception e) {
logger.error("Error:", e);
} finally {
tester.close();
}
}
public void connect(String ip, int port, String community) throws Exception {
String address = protocol + ":" + ip + "/" + port;
// CommunityTarget target = SnmpUtil.createCommunityTarget(address,
// community, version, 2 * 1000L, 3);
target = new CommunityTarget();
target.setCommunity(new OctetString(community));
target.setAddress(GenericAddress.parse(address));
target.setVersion(version);
target.setTimeout(2 * 1000L); // milliseconds
target.setRetries(3); // retry 3次
try {
udpTransportMapping = new DefaultUdpTransportMapping();
// 這裡一定要呼叫 listen, 才能收到結果
udpTransportMapping.listen();
snmp = new Snmp(udpTransportMapping);
} catch (Exception e) {
logger.error("Error", e);
throw e;
}
}
public void close() {
if (snmp != null) {
try {
snmp.close();
} catch (IOException ex1) {
snmp = null;
}
}
if (udpTransportMapping != null) {
try {
udpTransportMapping.close();
} catch (IOException ex2) {
udpTransportMapping = null;
}
}
}
public Variable snmpGet(String oid) throws Exception {
try {
PDU pdu = new PDU();
// pdu.add(new VariableBinding(new OID(new
// int[]{1,3,6,1,2,1,1,2})));
pdu.add(new VariableBinding(new OID(oid)));
pdu.setType(PDU.GET);
// 以同步的方式發送 snmp get, 會等待target 設定的 timeout 時間結束後
// 就會以 Request time out 的方式 return 回來
ResponseEvent response = snmp.send(pdu, target);
// logger.debug("PeerAddress:" + response.getPeerAddress());
PDU responsePdu = response.getResponse();
if (responsePdu == null) {
logger.debug("Request time out");
} else {
Vector<?> vbVect = responsePdu.getVariableBindings();
logger.debug("vb size:" + vbVect.size());
if (vbVect.size() == 0) {
logger.debug(" pdu vb size is 0 ");
} else {
Object obj = vbVect.firstElement();
VariableBinding vb = (VariableBinding) obj;
// logger.debug(vb.getOid() + " = " + vb.getVariable());
// logger.info("success finish snmp get the oid!");
return vb.getVariable();
}
}
} catch (Exception e) {
logger.error("Error", e);
throw e;
}
return null;
}
public List<VariableBinding> snmpGet(List<String> oidList) throws Exception {
try {
PDU pdu = new PDU();
pdu.setType(PDU.GET);
for (String oid : oidList) {
pdu.add(new VariableBinding(new OID(oid)));
}
// 以同步的方式發送 snmp get, 會等待target 設定的 timeout 時間結束後
// 就會以 Request time out 的方式 return 回來
ResponseEvent response = snmp.send(pdu, target);
// logger.debug("PeerAddress:" + response.getPeerAddress());
PDU responsePdu = response.getResponse();
if (responsePdu == null) {
logger.debug("Request time out");
} else {
logger.debug(" response pdu vb size is " + responsePdu.size());
List<VariableBinding> datalist = new ArrayList<VariableBinding>();
for (int i = 0; i < responsePdu.size(); i++) {
VariableBinding vb = responsePdu.get(i);
// logger.debug(vb.getOid() + "=" + vb.getVariable());
datalist.add(vb);
}
return datalist;
}
} catch (Exception e) {
logger.error("Error", e);
throw e;
}
return null;
}
}
執行結果
2014-12-04 17:19:11,055 [main] DEBUG SnmpGet 145
vb size:1
2014-12-04 17:19:11,083 [main] INFO SnmpGet 50
.1.3.6.1.2.1.1.3.0 = 1 day, 1:13:23.16
2014-12-04 17:19:14,084 [main] INFO SnmpGet 53
2014-12-04 17:19:14,085 [main] DEBUG SnmpGet 145
vb size:1
2014-12-04 17:19:14,086 [main] INFO SnmpGet 56
.1.3.6.1.2.1.1.1.0 = Linux server.maxkit.com.tw 2.6.32-431.el6.i686 #1 SMP Fri Nov 22 00:26:36 UTC 2013 i686
SNMP walk
這是使用 GETNext 的方式，當有下一個OID 時，就自動往下抓取，直到沒有資料為止。
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Vector;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.snmp4j.CommunityTarget;
import org.snmp4j.PDU;
import org.snmp4j.Snmp;
import org.snmp4j.event.ResponseEvent;
import org.snmp4j.mp.SnmpConstants;
import org.snmp4j.smi.GenericAddress;
import org.snmp4j.smi.Integer32;
import org.snmp4j.smi.Null;
import org.snmp4j.smi.OID;
import org.snmp4j.smi.OctetString;
import org.snmp4j.smi.Variable;
import org.snmp4j.smi.VariableBinding;
import org.snmp4j.transport.DefaultUdpTransportMapping;
public class SnmpGet {
public static Logger logger = LoggerFactory.getLogger(SnmpGet.class
.getName());
private static int version = SnmpConstants.version1;
private static String protocol = "udp";
private static CommunityTarget target = null;
private static DefaultUdpTransportMapping udpTransportMapping = null;
private static Snmp snmp = null;
public static void main(String[] args) {
String ip = "192.168.1.8";
String community = "public";
int port = 161;
Variable var = null;
SnmpGet tester = new SnmpGet();
// tester.snmpGet(ip, port, community, oidval);
try {
tester.connect(ip, port, community);
logger.info("");
logger.info("SNMP walk");
vblist = tester.snmpWalk("1.3.6.1.2.1.1");
for (VariableBinding vb : vblist) {
logger.info("oid:" + vb.getOid() + ", var=" + vb.getVariable());
}
} catch (Exception e) {
logger.error("Error:", e);
} finally {
tester.close();
}
}
public void connect(String ip, int port, String community) throws Exception {
String address = protocol + ":" + ip + "/" + port;
// CommunityTarget target = SnmpUtil.createCommunityTarget(address,
// community, version, 2 * 1000L, 3);
target = new CommunityTarget();
target.setCommunity(new OctetString(community));
target.setAddress(GenericAddress.parse(address));
target.setVersion(version);
target.setTimeout(2 * 1000L); // milliseconds
target.setRetries(3); // retry 3次
try {
udpTransportMapping = new DefaultUdpTransportMapping();
// 這裡一定要呼叫 listen, 才能收到結果
udpTransportMapping.listen();
snmp = new Snmp(udpTransportMapping);
} catch (Exception e) {
logger.error("Error", e);
throw e;
}
}
public void close() {
if (snmp != null) {
try {
snmp.close();
} catch (IOException ex1) {
snmp = null;
}
}
if (udpTransportMapping != null) {
try {
udpTransportMapping.close();
} catch (IOException ex2) {
udpTransportMapping = null;
}
}
}
/**
* 1)responsePDU == null<br>
* 2)responsePDU.getErrorStatus() != 0<br>
* 3)responsePDU.get(0).getOid() == null<br>
* 4)responsePDU.get(0).getOid().size() < targetOID.size()<br>
* 5)targetOID.leftMostCompare(targetOID.size(),responsePDU.get(0).getOid())
* !=0<br>
* 6)Null.isExceptionSyntax(responsePDU.get(0).getVariable().getSyntax())<br>
* 7)responsePDU.get(0).getOid().compareTo(targetOID) <= 0<br>
*/
public List<VariableBinding> snmpWalk(String targetOid) {
OID targetOID = new OID(targetOid);
PDU requestPDU = new PDU();
requestPDU.setType(PDU.GETNEXT);
requestPDU.add(new VariableBinding(targetOID));
try {
List<VariableBinding> vblist = new ArrayList<VariableBinding>();
boolean finished = false;
while (!finished) {
VariableBinding vb = null;
ResponseEvent response = snmp.send(requestPDU, target);
PDU responsePDU = response.getResponse();
if (null == responsePDU) {
logger.debug("responsePDU == null");
finished = true;
break;
} else {
vb = responsePDU.get(0);
}
// check finish
finished = checkWalkFinished(targetOID, responsePDU, vb);
if (!finished) {
// logger.debug("vb:" + vb.toString());
vblist.add(vb);
// Set up the variable binding for the next entry.
requestPDU.setRequestID(new Integer32(0));
requestPDU.set(0, vb);
}
}
// logger.debug("success finish snmp walk!");
return vblist;
} catch (Exception e) {
logger.error("Error: ", e);
}
return null;
}
/**
* check snmp walk finish
*
* @param resquestPDU
* @param targetOID
* @param responsePDU
* @param vb
* @return
*/
private boolean checkWalkFinished(OID targetOID, PDU responsePDU,
VariableBinding vb) {
boolean finished = false;
if (responsePDU.getErrorStatus() != 0) {
logger.debug("responsePDU.getErrorStatus() != 0 ");
logger.debug(responsePDU.getErrorStatusText());
finished = true;
} else if (vb.getOid() == null) {
logger.debug("vb.getOid() == null");
finished = true;
} else if (vb.getOid().size() < targetOID.size()) {
logger.debug("vb.getOid().size() < targetOID.size()");
finished = true;
} else if (targetOID.leftMostCompare(targetOID.size(), vb.getOid()) != 0) {
logger.debug("targetOID.leftMostCompare() != 0");
finished = true;
} else if (Null.isExceptionSyntax(vb.getVariable().getSyntax())) {
logger.debug("Null.isExceptionSyntax(vb.getVariable().getSyntax())");
finished = true;
} else if (vb.getOid().compareTo(targetOID) <= 0) {
logger.debug("Variable received is not "
+ "lexicographic successor of requested " + "one:");
logger.debug(vb.toString() + " <= " + targetOID);
finished = true;
}
return finished;
}
}
測試結果
2014-12-04 17:19:17,087 [main] INFO SnmpGet 60
SNMP GetList
2014-12-04 17:19:17,091 [main] DEBUG SnmpGet 182
response pdu vb size is 3
2014-12-04 17:19:17,091 [main] INFO SnmpGet 68
oid:1.3.6.1.2.1.1.1.0, var=Linux server.maxkit.com.tw 2.6.32-431.el6.i686 #1 SMP Fri Nov 22 00:26:36 UTC 2013 i686
2014-12-04 17:19:17,092 [main] INFO SnmpGet 68
oid:1.3.6.1.2.1.1.3.0, var=1 day, 1:13:29.25
2014-12-04 17:19:17,092 [main] INFO SnmpGet 68
oid:1.3.6.1.2.1.1.5.0, var=server.maxkit.com.tw
2014-12-04 17:19:20,092 [main] INFO SnmpGet 72
2014-12-04 17:19:20,093 [main] INFO SnmpGet 73
SNMP walk
2014-12-04 17:19:20,130 [main] DEBUG SnmpGet 276
targetOID.leftMostCompare() != 0
2014-12-04 17:19:20,130 [main] INFO SnmpGet 77
oid:1.3.6.1.2.1.1.1.0, var=Linux server.maxkit.com.tw 2.6.32-431.el6.i686 #1 SMP Fri Nov 22 00:26:36 UTC 2013 i686
2014-12-04 17:19:20,130 [main] INFO SnmpGet 77
oid:1.3.6.1.2.1.1.2.0, var=1.3.6.1.4.1.8072.3.2.10
2014-12-04 17:19:20,131 [main] INFO SnmpGet 77
oid:1.3.6.1.2.1.1.3.0, var=1 day, 1:13:32.26
2014-12-04 17:19:20,131 [main] INFO SnmpGet 77
oid:1.3.6.1.2.1.1.4.0, var=Root <root@localhost> (configure /etc/snmp/snmp.local.conf)
2014-12-04 17:19:20,131 [main] INFO SnmpGet 77
oid:1.3.6.1.2.1.1.5.0, var=server.maxkit.com.tw
2014-12-04 17:19:20,132 [main] INFO SnmpGet 77
oid:1.3.6.1.2.1.1.6.0, var=Unknown (edit /etc/snmp/snmpd.conf)
2014-12-04 17:19:20,132 [main] INFO SnmpGet 77
oid:1.3.6.1.2.1.1.8.0, var=0:00:00.01
2014-12-04 17:19:20,132 [main] INFO SnmpGet 77
oid:1.3.6.1.2.1.1.9.1.2.1, var=1.3.6.1.6.3.11.2.3.1.1
2014-12-04 17:19:20,132 [main] INFO SnmpGet 77
oid:1.3.6.1.2.1.1.9.1.2.2, var=1.3.6.1.6.3.15.2.1.1
2014-12-04 17:19:20,133 [main] INFO SnmpGet 77
oid:1.3.6.1.2.1.1.9.1.2.3, var=1.3.6.1.6.3.10.3.1.1
2014-12-04 17:19:20,133 [main] INFO SnmpGet 77
oid:1.3.6.1.2.1.1.9.1.2.4, var=1.3.6.1.6.3.1
2014-12-04 17:19:20,133 [main] INFO SnmpGet 77
oid:1.3.6.1.2.1.1.9.1.2.5, var=1.3.6.1.2.1.49
2014-12-04 17:19:20,133 [main] INFO SnmpGet 77
oid:1.3.6.1.2.1.1.9.1.2.6, var=1.3.6.1.2.1.4
2014-12-04 17:19:20,133 [main] INFO SnmpGet 77
oid:1.3.6.1.2.1.1.9.1.2.7, var=1.3.6.1.2.1.50
2014-12-04 17:19:20,133 [main] INFO SnmpGet 77
oid:1.3.6.1.2.1.1.9.1.2.8, var=1.3.6.1.6.3.16.2.2.1
2014-12-04 17:19:20,133 [main] INFO SnmpGet 77
oid:1.3.6.1.2.1.1.9.1.3.1, var=The MIB for Message Processing and Dispatching.
2014-12-04 17:19:20,134 [main] INFO SnmpGet 77
oid:1.3.6.1.2.1.1.9.1.3.2, var=The MIB for Message Processing and Dispatching.
2014-12-04 17:19:20,134 [main] INFO SnmpGet 77
oid:1.3.6.1.2.1.1.9.1.3.3, var=The SNMP Management Architecture MIB.
2014-12-04 17:19:20,134 [main] INFO SnmpGet 77
oid:1.3.6.1.2.1.1.9.1.3.4, var=The MIB module for SNMPv2 entities
2014-12-04 17:19:20,134 [main] INFO SnmpGet 77
oid:1.3.6.1.2.1.1.9.1.3.5, var=The MIB module for managing TCP implementations
2014-12-04 17:19:20,134 [main] INFO SnmpGet 77
oid:1.3.6.1.2.1.1.9.1.3.6, var=The MIB module for managing IP and ICMP implementations
2014-12-04 17:19:20,134 [main] INFO SnmpGet 77
oid:1.3.6.1.2.1.1.9.1.3.7, var=The MIB module for managing UDP implementations
2014-12-04 17:19:20,134 [main] INFO SnmpGet 77
oid:1.3.6.1.2.1.1.9.1.3.8, var=View-based Access Control Model for SNMP.
2014-12-04 17:19:20,135 [main] INFO SnmpGet 77
oid:1.3.6.1.2.1.1.9.1.4.1, var=0:00:00.01
2014-12-04 17:19:20,136 [main] INFO SnmpGet 77
oid:1.3.6.1.2.1.1.9.1.4.2, var=0:00:00.01
2014-12-04 17:19:20,137 [main] INFO SnmpGet 77
oid:1.3.6.1.2.1.1.9.1.4.3, var=0:00:00.01
2014-12-04 17:19:20,138 [main] INFO SnmpGet 77
oid:1.3.6.1.2.1.1.9.1.4.4, var=0:00:00.01
2014-12-04 17:19:20,139 [main] INFO SnmpGet 77
oid:1.3.6.1.2.1.1.9.1.4.5, var=0:00:00.01
2014-12-04 17:19:20,143 [main] INFO SnmpGet 77
oid:1.3.6.1.2.1.1.9.1.4.6, var=0:00:00.01
2014-12-04 17:19:20,143 [main] INFO SnmpGet 77
oid:1.3.6.1.2.1.1.9.1.4.7, var=0:00:00.01
2014-12-04 17:19:20,144 [main] INFO SnmpGet 77
oid:1.3.6.1.2.1.1.9.1.4.8, var=0:00:00.01
SNMP Asynchronous Get
如果在程式中，無法在發送 snmp request 之後，直接等待結果，例如在 UI 界面上發送 request，但 UI 無法被 blocking 以等待 response 或 timeout 的狀況下，我們就必須要使用非同步 SNMP Get。
程式中主要是利用 ThreadPool，以 multithread 的方式，在背景中發送 request，並以 event listener 作為 call back function。
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.snmp4j.CommunityTarget;
import org.snmp4j.MessageDispatcherImpl;
import org.snmp4j.PDU;
import org.snmp4j.Snmp;
import org.snmp4j.event.ResponseEvent;
import org.snmp4j.event.ResponseListener;
import org.snmp4j.mp.MPv1;
import org.snmp4j.mp.MPv2c;
import org.snmp4j.mp.MPv3;
import org.snmp4j.mp.SnmpConstants;
import org.snmp4j.smi.GenericAddress;
import org.snmp4j.smi.OID;
import org.snmp4j.smi.OctetString;
import org.snmp4j.smi.VariableBinding;
import org.snmp4j.transport.DefaultUdpTransportMapping;
import org.snmp4j.util.MultiThreadedMessageDispatcher;
import org.snmp4j.util.ThreadPool;
import org.snmp4j.util.WorkerPool;
public class SnmpClientAsync {
public static Logger logger = LoggerFactory.getLogger(SnmpClientAsync.class
.getName());
private static int version = SnmpConstants.version1;
private static String protocol = "udp";
private static CommunityTarget target = null;
private static DefaultUdpTransportMapping udpTransportMapping = null;
private static Snmp snmp = null;
private WorkerPool threadPool = null;
public static void main(String[] args) {
String ip = "192.168.1.8";
String community = "public";
int port = 161;
SnmpClientAsync tester = new SnmpClientAsync();
try {
tester.connect(ip, port, community);
logger.info("");
logger.info("SNMP GetList");
List<String> oidList = new ArrayList<String>();
oidList.add(".1.3.6.1.2.1.1.1.0");
oidList.add(".1.3.6.1.2.1.1.3.0");
oidList.add(".1.3.6.1.2.1.1.5.0");
tester.snmpGet(oidList);
// 非同步，必須等待一段處理時間
Thread.sleep(3*1000);
} catch (Exception e) {
logger.error("Error:", e);
} finally {
tester.close();
}
}
public void connect(String ip, int port, String community) throws Exception {
String address = protocol + ":" + ip + "/" + port;
target = new CommunityTarget();
target.setCommunity(new OctetString(community));
target.setAddress(GenericAddress.parse(address));
target.setVersion(version);
target.setTimeout(2 * 1000L); // milliseconds
target.setRetries(3); // retry 3次
try {
threadPool = ThreadPool.create(ip + "SNMPWorkPool", 2);
MultiThreadedMessageDispatcher dispatcher = new MultiThreadedMessageDispatcher(
threadPool, new MessageDispatcherImpl());
udpTransportMapping = new DefaultUdpTransportMapping();
snmp = new Snmp(dispatcher, udpTransportMapping);
snmp.getMessageDispatcher().addMessageProcessingModel(new MPv1());
snmp.getMessageDispatcher().addMessageProcessingModel(new MPv2c());
snmp.getMessageDispatcher().addMessageProcessingModel(new MPv3());
snmp.listen();
} catch (Exception e) {
logger.error("Error", e);
throw e;
}
}
public void close() {
if (snmp != null) {
try {
snmp.close();
} catch (IOException ex1) {
snmp = null;
}
}
if (udpTransportMapping != null) {
try {
udpTransportMapping.close();
} catch (IOException ex2) {
udpTransportMapping = null;
}
}
if (threadPool != null) {
threadPool.stop();
threadPool = null;
}
}
public void snmpGet(List<String> oidList) throws Exception {
try {
PDU pdu = new PDU();
pdu.setType(PDU.GET);
for (String oid : oidList) {
pdu.add(new VariableBinding(new OID(oid)));
}
snmp.send(pdu, target, null, listener);
} catch (Exception e) {
logger.error("Error", e);
throw e;
}
}
public void printResponse(List<VariableBinding> datalist) {
for (VariableBinding vb : datalist) {
logger.info("oid:" + vb.getOid() + ", var=" + vb.getVariable());
}
}
ResponseListener listener = new ResponseListener() {
public void onResponse(ResponseEvent event) {
((Snmp) event.getSource()).cancel(event.getRequest(), this);
PDU response = event.getResponse();
PDU request = event.getRequest();
//logger.debug("[request]:" + request);
if (response == null) {
logger.debug("[ERROR]: response is null");
} else if (response.getErrorStatus() != 0) {
logger.debug("[ERROR]: response status"
+ response.getErrorStatus() + " Text:"
+ response.getErrorStatusText());
} else {
logger.debug("Received response Success!!!");
List<VariableBinding> datalist = new ArrayList<VariableBinding>();
for (int i = 0; i < response.size(); i++) {
VariableBinding vb = response.get(i);
logger.debug(vb.toString());
datalist.add(vb);
}
printResponse(datalist);
}
}
};
}
測試結果
2014-12-08 10:18:07,548 [main] INFO SnmpClientAsync 49
2014-12-08 10:18:07,581 [main] INFO SnmpClientAsync 50
SNMP GetList
2014-12-08 10:18:07,607 [192.168.1.8SNMPWorkPool.0] DEBUG SnmpClientAsync 151
Received response Success!!!
2014-12-08 10:18:07,607 [192.168.1.8SNMPWorkPool.0] DEBUG SnmpClientAsync 155
1.3.6.1.2.1.1.1.0 = Linux koko.maxkit.com.tw 2.6.32-431.el6.i686 #1 SMP Fri Nov 22 00:26:36 UTC 2013 i686
2014-12-08 10:18:07,610 [192.168.1.8SNMPWorkPool.0] DEBUG SnmpClientAsync 155
1.3.6.1.2.1.1.3.0 = 4 days, 18:12:20.49
2014-12-08 10:18:07,611 [192.168.1.8SNMPWorkPool.0] DEBUG SnmpClientAsync 155
1.3.6.1.2.1.1.5.0 = koko.maxkit.com.tw
2014-12-08 10:18:07,611 [192.168.1.8SNMPWorkPool.0] INFO SnmpClientAsync 133
oid:1.3.6.1.2.1.1.1.0, var=Linux koko.maxkit.com.tw 2.6.32-431.el6.i686 #1 SMP Fri Nov 22 00:26:36 UTC 2013 i686
2014-12-08 10:18:07,611 [192.168.1.8SNMPWorkPool.0] INFO SnmpClientAsync 133
oid:1.3.6.1.2.1.1.3.0, var=4 days, 18:12:20.49
2014-12-08 10:18:07,612 [192.168.1.8SNMPWorkPool.0] INFO SnmpClientAsync 133
oid:1.3.6.1.2.1.1.5.0, var=koko.maxkit.com.tw
Reference
Java實現snmp的get和walk代碼示例
Introduction to snmp4j
