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    • During periods of high traffic, what is an acceptable percentage of discarded packets in ONTAP?
      https://kb.netapp.com/on-prem/ontap/da/NAS/NAS-KBs/During_periods_of_high_traffic_what_is_an_acceptable_percentage_of_discarded_packets_in_ONTAP
      Applies to ONTAP 9 Data ONTAP 8 Data ONTAP operating in 7-Mode Answer Generally, discarded packets below 0.1% of the total traffic should not substantially affect service. Additional Information A hig...Applies to ONTAP 9 Data ONTAP 8 Data ONTAP operating in 7-Mode Answer Generally, discarded packets below 0.1% of the total traffic should not substantially affect service. Additional Information A high volume of traffic can lead bus overruns causing some packets to be discarded. This does not always have a noticeable impact on the environment. More information can be found in our KB article on Troubleshooting Ethernet Network Ports in ONTAP using ifstat. Why does packet loss impact performance?
    • How to test port connectivity without the use of telnet in Windows
      https://kb.netapp.com/on-prem/ontap/da/NAS/NAS-KBs/How_to_test_port_connectivity_without_the_use_of_telnet_in_Windows
      Applies to Windows PowerShell Description The purpose of this article is to cover alternatives to using telnet to confirm if you can connect to a port on a system and to troubleshoot port connectivity...Applies to Windows PowerShell Description The purpose of this article is to cover alternatives to using telnet to confirm if you can connect to a port on a system and to troubleshoot port connectivity as most servers and workstations have it disabled as it is not secure.
    • AWS: Cannot move CVO HA between connectors
      https://kb.netapp.com/Cloud/BlueXP/Cloud_Manager/AWS__Cannot_move_CVO_HA_between_connectors
      Applies to ONTAP Cloud Manager (Service Connector) Cloud Volumes ONTAP (CVO) Amazon Web Services (AWS) Mediator Availability Zone (AZ) Issue Moving CVO HA (deployed across multiple AZ`s in AWS) will f...Applies to ONTAP Cloud Manager (Service Connector) Cloud Volumes ONTAP (CVO) Amazon Web Services (AWS) Mediator Availability Zone (AZ) Issue Moving CVO HA (deployed across multiple AZ`s in AWS) will fail/remain in a degraded state with no explicit error message.
    • Failed to set networking configuration on ActiveIQ UM 9.7 because the hostname contains a dot
      https://kb.netapp.com/data-mgmt/AIQUM/AIQUM_Kbs/Failed_to_set_networking_configuration_on_ActiveIQ_UM_9.7_because_the_hostname_contains_a_dot
      Applies to An error appears after changing the network configuration following the maintenance console NOTE: Changes to the network settings have been made outside of the maintenance console. The pend...Applies to An error appears after changing the network configuration following the maintenance console NOTE: Changes to the network settings have been made outside of the maintenance console. The pending changes made in the maintenance console have been discarded in order to avoid owerwriting the external changes. An error appears in /var/log/syslog: Jun <time> <hostname> network-config: Edit session: /tmp/<tempfile> - Command /usr/bin/hostnamectl set-hostname failed (1).
    • SwitchIfIslDownWarn_Alert alert from Link Aggregate XX
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/SwitchIfIslDownWarn_Alert_alert_from_Link_Aggregate_XX
      After upgrading ONTAP to 9.5P4, you are seeing the following health monitor alert: Probable Cause: The cable used to connect switch "netapp_switch_01/ Link Aggregate 10" to the ISL port might be fault...After upgrading ONTAP to 9.5P4, you are seeing the following health monitor alert: Probable Cause: The cable used to connect switch "netapp_switch_01/ Link Aggregate 10" to the ISL port might be faulty. Corrective Actions: 1) Check whether the cable is fully inserted into the interface port on both ends. reconnecting it, verify whether the link of the ISL port is up by executing the commands as per switch configuration guide or by checking whether the Link
    • After node reboots, LACP ports are down and switch ports are in 'Link Flap error-disable' state
      https://kb.netapp.com/on-prem/ontap/da/NAS/NAS-KBs/After_node_reboots_LACP_ports_are_down_and_switch_ports_are_in_Link_Flap_error_disable_state
      Storage nodes are rebooted during ONTAP upgrade and some LACP members are in a down state. A node's network ports are down and in a no link state. ​​​​​​​There is no indication from storage side of an...Storage nodes are rebooted during ONTAP upgrade and some LACP members are in a down state. A node's network ports are down and in a no link state. ​​​​​​​There is no indication from storage side of any link flapping or any attempt to negotiate LACP measured from Active IQ IFCONFIG-VVV section or node run -node <node> ifconfig -v: The Cisco network switch is investigated and it is determined that the corresponding switch interfaces are in the Link Flap error-disable state.
    • Does ONTAP 9 support changing default SMB ports?
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/Does_ONTAP_9_support_changing_default_SMB_ports
      Applies to ONTAP 9 Answer ONTAP 9 does not support changing default SMB ports (i.e. TCP port 139/445). Additional Information For more information, see article: What ports need to be open to allow acc...Applies to ONTAP 9 Answer ONTAP 9 does not support changing default SMB ports (i.e. TCP port 139/445). Additional Information For more information, see article: What ports need to be open to allow access to ONTAP and which port numbers are used for communications?
    • ONTAP is fragmenting packets for packets with the 'do not fragment' flag set
      https://kb.netapp.com/on-prem/ontap/da/NAS/NAS-KBs/ONTAP_is_fragmenting_packets_for_packets_with_the_do_not_fragment_flag_set
      Applies to ONTAP 9.x Issue Packets with a do not fragment flag are still fragmented when sent from the ONTAP management interface The configuration is as the following: Physical port e10a with MTU 900...Applies to ONTAP 9.x Issue Packets with a do not fragment flag are still fragmented when sent from the ONTAP management interface The configuration is as the following: Physical port e10a with MTU 9000 Physical port e10c with MTU 9000 Interface group a0b with MTU 9000 VLAN a0b-33 with MTU 1500
    • NDMP directory restore fails with error: Read Socket received EOF
      https://kb.netapp.com/on-prem/ontap/DP/NDMP/NDMP-KBs/NDMP_directory_restore_fails_with_error__Read_Socket_received_EOF
      00000034.0b29c4af 04d46d51 Mon Mar 15 2021 17:47:28 +01:00 [kern_ndmpd:info:5886] [56250] DEBUG: S 00000034.0b29c4b0 04d46d51 Mon Mar 15 2021 17:47:28 +01:00 [kern_ndmpd:info:5886] [56250] DEBUG: sess...00000034.0b29c4af 04d46d51 Mon Mar 15 2021 17:47:28 +01:00 [kern_ndmpd:info:5886] [56250] DEBUG: S 00000034.0b29c4b0 04d46d51 Mon Mar 15 2021 17:47:28 +01:00 [kern_ndmpd:info:5886] [56250] DEBUG: sess_handle 0x166400000000 seq 5 (0x5) 00000034.0b29c4b2 04d46d51 Mon Mar 15 2021 17:47:28 +01:00 [kern_ndmpd:info:5886] [56250] DEBUG: msg (RESTORE: Error: Read Socket received EOF.\n)
    • NDMP performance slow after ONTAP upgrade
      https://kb.netapp.com/on-prem/ontap/DP/NDMP/NDMP-KBs/NDMP_performance_slow_after_ONTAP_upgrade
      Applies to ONTAP 9 NDMP Interface group (ifgrp) Networking Issue After an ONTAP upgrade, NDMP backup is slow from one node, moving the volume to another node shows normal backup speeds. TCPDumps shows...Applies to ONTAP 9 NDMP Interface group (ifgrp) Networking Issue After an ONTAP upgrade, NDMP backup is slow from one node, moving the volume to another node shows normal backup speeds. TCPDumps shows no issues with the network Found some errors in the ifgrp ports When performing an admin state down on one of the ports, backup speeds are back to normal
    • Cloud Manager - Unable to contact IPA. Cannot proceed with upgrade process
      https://kb.netapp.com/Cloud/BlueXP/Cloud_Manager/Cloud_Manager_-_Unable_to_contact_IPA._Cannot_proceed_with_upgrade_process
      After clicking on "Upgrade Now" option for CVO in Cloud Manager, this error is seen: “Unable to contact IPA. Cannot proceed with upgrade process.” The KB article provides the cause and solution for th...After clicking on "Upgrade Now" option for CVO in Cloud Manager, this error is seen: “Unable to contact IPA. Cannot proceed with upgrade process.” The KB article provides the cause and solution for this issue.