AWK：匹配来自两个字段/列或数组的重复元素

I have this input:

我有这个输入：

hostname1 111.111.111.123 222.222.222.222
hostname2 123.123.123.123 132.132.132.132
hostname3 101.102.103.104 111.111.111.123
hostname4 192.168.100.123 192.168.101.123
hostname1 111.11