Mostly the issue is found after ONTAP is upgraded to 9.2 or later, the filer does not reply to every ICMP (ping) request even if it can be found in a packet trace. A strange behavior could be related ...Mostly the issue is found after ONTAP is upgraded to 9.2 or later, the filer does not reply to every ICMP (ping) request even if it can be found in a packet trace. A strange behavior could be related to multiple LIFs on the same port not responding at different times. This issue is affecting the NFS data transfer also if UDP is used as a transport layer causing a huge delay [root@centos-04 /]# mount -t nfs -o vers=3,proto=udp 10.128.242.45:/vol1_svm2 /mnt/vol1_svm2_ontap93