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    • How To analyze and troubleshoot LIF connectivity issues, in a non-routed network
      https://kb.netapp.com/on-prem/ontap/da/NAS/NAS-KBs/How_To_analyze_and_troubleshoot_LIF_connectivity_issues_in_a_non_routed_network
      Applies to ONTAP 9 LIF on non-routed network (subnet) Description After ONTAP upgrade (including failover) a LIF cannot be reached by (some) clients, anymore Takeover and Giveback of the cluster nodes...Applies to ONTAP 9 LIF on non-routed network (subnet) Description After ONTAP upgrade (including failover) a LIF cannot be reached by (some) clients, anymore Takeover and Giveback of the cluster nodes, restored the access for the clients Root Cause Analysis did not reveal any issue on the ONTAP side (it was found that other clients on the same lif/network were able to connect)
    • After ONTAP reboot, LIFs are inaccessible when static ARP entries are present
      https://kb.netapp.com/on-prem/ontap/da/NAS/NAS-KBs/After_ONTAP_reboot_LIFs_are_inaccessible_when_static_ARP_entries_are_present
      Applies to ONTAP 9 Issue Following an ONTAP reboot (such as an upgrade), some LIFs are inaccessible from one or more clients Pings between impacted LIFs and clients fail Filer-side packet traces do no...Applies to ONTAP 9 Issue Following an ONTAP reboot (such as an upgrade), some LIFs are inaccessible from one or more clients Pings between impacted LIFs and clients fail Filer-side packet traces do not show evidence of clients responding to outbound traffic from the filer
    • Data LIF of the takeover node briefly disconnects during node takeover
      https://kb.netapp.com/on-prem/ontap/Ontap_OS/OS-KBs/Data_LIF_of_the_takeover_node_briefly_disconnects_during_node_takeover
      Sun Feb 13 16:12:17 +0100 [node01: vifmgr: vifmgr.lifsuccessfullymoved:notice]: LIF node02-cifs (on virtual server 3), IP address 10.20.20.10, is now hosted on node node01, port a0d. Sun Feb 13 16:12:...Sun Feb 13 16:12:17 +0100 [node01: vifmgr: vifmgr.lifsuccessfullymoved:notice]: LIF node02-cifs (on virtual server 3), IP address 10.20.20.10, is now hosted on node node01, port a0d. Sun Feb 13 16:12:17 +0100 [node01: vifmgr: vifmgr.lifsuccessfullymoved:notice]: LIF node02-nfs (on virtual server 3), IP address 10.20.21.8, is now hosted on node node01, port a0d.
    • NDMP backups fails establishing a connection on port 10000
      https://kb.netapp.com/on-prem/ontap/DP/NDMP/NDMP-KBs/NDMP_backups_fails_establishing_a_connection_on_port_10000
      Applies to ONTAP 9 NDMP LIF configuration Veritas NBU NDMP services are running on SVM, but backups started by external backup application fails to connect over 10000 port . Unable to configure NDMP b...Applies to ONTAP 9 NDMP LIF configuration Veritas NBU NDMP services are running on SVM, but backups started by external backup application fails to connect over 10000 port . Unable to configure NDMP backup for NetApp fileshares in Veritas NetBackup. The NDMP service is enabled on the firewall policy. Error Identified on DMA: Validation of the credentials failed. Either the media servers could not be reached or the credentials are invalid. Valid credentials are required for backups to succeed.