[ovirt-users] Unable to add hosts in ovirt-engine 3.6

Hi Users, Good day, i'm having problem on adding hosts/hypervisor in ovirt-engine 3.6, a month ago i have successfully added 2 hypervisor when the engine is still version 3.5, then a week ago, i manage to update the engine from 3.5 to 3.6, yesterday i'm adding another 1 hypervisor and i tried using ovirt 3.6 repo for the new hypervisor and failed to add, tried to add the ovirt 3.5 repo and still failed to add, the ovirt-engine event tab shows "error code 1 during ssh session" i've googled it, "correct me if i'm wrong with this" the hypervisor having problema resolving name server which inside of ovirt repo 3.5 or 3.6, when i tried to open those "repolist" and tried to access it on my web browser it shows that "This site can’t be reached" some of sites inside repos are unable to reach or the directory path did not exist. are we having problem about those repos or it just me? is there any other way to install or add hosts whenever the repos or sites that holding the packages are having problem? TIA :) Sandvik