What is the failure you get when running https://github.com/alaskacommunications/nagios_check_keepalived/blob/master/check_keepalived_vrrp.pl on ubuntu bionic? You only showed the undef errors when switching to SNMPv1
What is the failure you get when running https:/ /github. com/alaskacommu nications/ nagios_ check_keepalive d/blob/ master/ check_keepalive d_vrrp. pl on ubuntu bionic? You only showed the undef errors when switching to SNMPv1