Java连接sybase数据库失败(可能是服务器配置原因)

[IT有个圈儿]

import java.sql.*;

public class TestDB {

public static void main(String[] args) {
// TODO Auto-generated method stub
String driver = "com.sybase.jdbc3.jdbc.SybDriver";
String host = "192.168.100.8";
int port = 5000;
String URL ="jdbc:sybase:Tds:" + host+":"+port+"/"+ "model";
String userName="usename";
String pwd="passwd";
showTable(driver,URL,userName,pwd);
}

public static void showTable(String driver,String URL,
String userName,String pwd){
try{
Class.forName(driver);
Connection connection = DriverManager.getConnection(
URL,userName,pwd);

Statement statement = connection.createStatement();

String query = "select * from sysusers";
ResultSet resultSet = statement.executeQuery(query);

while(resultSet.next()){
System.out.println(resultSet.getString(1)+ " " +
resultSet.getString(2)); //打印2列
}
connection.close();
}catch(ClassNotFoundException cnfe){
System.err.println("error found : "+ cnfe);
}catch(SQLException sqle){
System.err.println("error connection : "+ sqle);
}
}

}

jconn3.jar已经导入，数据库使用isql可以访问，服务器可以telnet登录。

运行出现如下错误：error connection : java.sql.SQLException: JZ006: 捕获到 IO 例外:java.net.NoRouteToHostException: No route to host: connect

求高手指点！