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"Failed to restore PF state : Limit exceeded" error after NSX upgrade (2146171)

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Virtual machines lose network connectivity after vMotion under the following conditions:
  • Distributed Firewall (DFW) is enabled in the environment and;
  • NSX for vSphere setup upgraded from NSX-V 6.1.x release to NSX-V 6.2.3 releases and 6.2.4 release and virtual machines are later migrated between upgraded ESXi hosts.
  • When a virtual machine is migrated from an upgraded host to a non-upgraded host.


  • This only affects virtual machines that are created in NSX for vSphere 6.1.x and migrated to 6.2.3 releases or 6.2.4 as part of an upgrade.
  • In addition to the above, you may also experience this issue for virtual machines created in 6.1.x and if you upgrade from 6.1.x to 6.2.2 and then upgrade to 6.2.3 releases or 6.2.4.
  • Customers that are upgrading from vCloud Networking and Security (vCNS) 5.5.x to NSX for vSphere 6.2.4 are not impacted.
  • For additional symptoms and log entries, see the Additional Information section in this KB.


Upgrading to VMware NSX for vSphere 6.2.5 resolves the issue.


This issue occurs when the VSIP module at the kernel level does not handle the export_version deployed in NSX for vSphere 6.1.x correctly during the upgrade process.


This issue is resolved in VMware NSX for vSphere 6.2.5, available at VMware Downloads.

To work around this issue if you do not want to upgrade, run a script that modifies the virtual machine export_version. To acquire the script and procedure, file a support request with VMware Support and note this KB Article 2146171 in the problem description. For more information, see How to Submit a Support Request.

Additional Information

You experience these additional symptoms:
  • In the /var/log/vmkernel.log file on the ESXi host, you see entries similar to:

    2016-07-01T07:02:37.357Z cpu7:223405)WARNING: NetDVS: 547: portAlias is NULL
    2016-07-01T07:02:37.357Z cpu7:223405)Net: 2312: connected VM eth0 to VM Network, portID 0x200000c
    2016-07-01T07:02:37.362Z cpu7:223405)PFImportState: unsupported version: 0
    2016-07-01T07:02:37.363Z cpu7:223405)vsip VSIPDVFRestoreState:1912: Failed to restore PF state : Limit exceeded
    2016-07-01T07:02:37.363Z cpu7:223405)WARNING: NetPort: 1431: failed to enable port 0x200000c: Failure
    2016-07-01T07:02:37.363Z cpu7:223405)NetPort: 1632: disabled port 0x200000c
    2016-07-01T07:02:37.363Z cpu7:223405)WARNING: Net: vm 223391: 5353: cannot enable port 0x200000c: Failure
    2016-07-01T07:02:37.383Z cpu7:223405)Net: 3354: disconnected client from port 0x200000c

    : The preceding log excerpts are only examples. Date, time, and environmental variables may vary depending on your environment.

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network connectivity, migration, NSX 6.2.4 upgrade issues, Failed to restore PF state : Limit exceeded, VMware NSX, 6.2.3, 6.2.4, vmotion, upgrade

See Also

Request a Product Feature

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