define host{
    use windows-server
    host_name serverA
    hostgroups 060202
    alias 060202
    contact_groups yu
    address 192.168.1.1
}
define host{
    use windows-server
    host_name serverA
    hostgroups 060202
    alias 060202
    contact_groups yu
    address 192.168.1.11
}

define host{
    use windows-server
    host_name serverA
    hostgroups 060202
    alias 060202
    contact_groups yu
    address 192.168.1.21
}
define host{
    use windows-server
    host_name serverA
    hostgroups 060202
    alias 060202
    contact_groups yu
    address 192.168.1.1
}