Not able to install RPM through "yum" utility?

I am trying to search / install rpm through yum utility, when I am searching for it am getting the below exception.

[root@dhcp-blr-kkm-itpark-10fl-10-184-29-195 /]# yum search libaio-devel-0.3.109-12.el7-i686

Loaded plugins: langpacks

http://public-yum.oracle.com/repo/OracleLinux/OL7/UEKR3/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to public-yum.oracle.com:80; No route to host"

Trying other mirror.

To over come this situation, follow the below steps.

1. Export your Proxy as follows.

[root@dhcp-blr-kkm-itpark-10fl-10-184-29-195 /]# export http_proxy="http://www-XXXXXXXXXX.com:80"

[root@dhcp-blr-kkm-itpark-10fl-10-184-29-195 /]# yum search libaio-devel-0.3.109-12.el7-i686

Loaded plugins: langpacks

ol7_UEKR3                                                                                                                                                                     | 1.2 kB  00:00:00

  2. go to /etc/yum.repos.d/ -> vi public-yum-ol7.repo and edit the below two entries from 0 to 1.

Now try the same.