问一个关于oracle dblink的问题!

这是报错图片!create database link remote_server
connect to admin identified by admin
using '(DESCRIPTION =
       (ADDRESS_LIST =
       (ADDRESS = (PROTOCOL = TCP)(HOST = 11.133.183.237)(PORT = 1521)))
       (CONNECT_DATA = (SERVICE_NAME = ITSM))
       )';
这里是dblink帐号密码sid都正确本机的 IP 为11.140.160.136  是不是IP 的问题呀?