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    • https://kb.netapp.com/on-prem/ontap/da/NAS/NAS-KBs/Slow_throughput_due_to_network_device_or_client_marking_a_majority_of_packets_with_ECN-Echo
      “netstat -s -p tcp” shows a high number of packets with CE compared to the total packets received: “packets with ECN CE bit set” / “packets received” > 0.005 Packet trace shows all or a majority of pa...“netstat -s -p tcp” shows a high number of packets with CE compared to the total packets received: “packets with ECN CE bit set” / “packets received” > 0.005 Packet trace shows all or a majority of packet received by a client or ONTAP with the IP ECN field set to “Congestion Expirienced” (CE), 0b11
    • https://kb.netapp.com/on-prem/ontap/da/NAS/NAS-KBs/SMB_and_other_services_hung_from_Windows_Server_after_ONTAP_upgrade_to_9.6_or_9.7
      Applies to ONTAP 9.6 and 9.7 Windows 2012 and 2016 ECN enabled network Issue After an ONTAP upgrade to 9.6 or 9.7, access to storage controller services is hung or shows extreme high latency from cert...Applies to ONTAP 9.6 and 9.7 Windows 2012 and 2016 ECN enabled network Issue After an ONTAP upgrade to 9.6 or 9.7, access to storage controller services is hung or shows extreme high latency from certain windows server systems.