We are unable to report against 'Average Response' for the ICMP vendor cert
DxNetOps Performance Management any version
Backing Vendor Cert for Reachability is 'System Statistics' rather than 'ICMP'. For system statistics there is no average response time - only ICMP supports that
Rediscover the device(s) with the 'Use ICMP' check box checked
Then do 'update metric family' for the reachability metric and the backing vendor cert for reachability should change to ICMP. After a few poll cycles you should be able to report against average response time. If there are many devices you are looking to change the the change detection process should handle this but that could take up to 24 hours