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Virtual machines lose network connectivity in NSX 6.2.x (2146293)

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Symptoms

In the default gateway when the pMac of DLR is the MAC address instead of generic DLR MAC address, Windows virtual machines lose network connectivity.

Note: For additional symptoms and log entries, see the Additional Information section.

Purpose

Upgrading to NSX for vSphere 6.2.4 resolves the issue.

Resolution

This issue is resolved in VMware NSX for vSphere 6.2.4, available at VMware Downloads.

To work around this issue if you do not want to upgrade, use one of these options:
  • Configure the static ARP for the default gateway within the guest operating system of the virtual machine.
  • Disable the ARP Suppression and ARP Proxy. To disable the ARP Suppression and ARP Proxy, contact VMware Support and note this Knowledge Base article ID (2146293) in the problem description. For more information, see How to Submit a Support Request.

Additional Information

You experience these additional symptoms:
  • When you run the net-vdr -C -l command in the ESXi host, you see entries similar to:

    Host locale Id:             421b0a09-6c98-293c-ac15-89ab052c2abf

    Connection Information:
    -----------------------

    DvsName           VdrPort           NumLifs  VdrVmac
    -------           -------           -------  -------
    NSwitch           vdrPort           5        02:50:56:56:44:52
    Teaming Policy: SrcPortId Hashing
    Uplink   : Uplink 1(100663301): 00:50:56:ff:d8:5e(Team member)  <--------pMac
    Uplink   : Uplink 2(100663299): 00:50:56:e7:d3:da(Team member)  <------- pMac

    Stats : Pkt Dropped      Pkt Replaced     Pkt Skipped
    Input : 0                0                315452397
    Output : 39749            22               1037595966


    Note: Each ESXi host has a unique set of pMac depending on the number of uplinks. However, the vdrport MAC is same on every ESXi host.
  • When you run net-vdr -C and arp -a commands, the pMac address information displayed must be different. 

    Note: The default gateway in the guest operating system must be 02:50:56:56:44:52 and not the same as the pMac.

See Also

Request a Product Feature

To request a new product feature or to provide feedback on a VMware product, please visit the Request a Product Feature page.

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