如果在HOST关键字中有一个主机名,则多个IP不能使用同一个监听端口。不过,关键字(IP=FIRST)可以解决这个问题。如:

(ADDRESS = (PROTOCOL = TCP) (HOST = capaa) (PORT = 1521) (IP = FIRST))
(ADDRESS = (PROTOCOL = TCP) (HOST = capaa2) (PORT = 1521) (IP = FIRST))