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VMware vSphere 6.5.x on Dell EMC PowerEdge Systems Release Notes

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Network connectivity is lost when virtual machines configured with Virtual Guest Tagging (VGT) are migrated to another ESXi host

Description:
When virtual machines that are configured with 802.1q VLAN tagging are migrated to another ESXi host, the network connectivity is lost. The network connectivity is reestablished within a few minutes without any user intervention.
Applies to:
ESXi 6.5.x
Cause:
VMware VMotion is unable to send a Reverse Address Resolution Protocol (RARP) for the tagged guest virtual machine. For more information VMware Knowledge Base article 2113783.
Workaround:
Force an Address Resolution Protocol (ARP) lookup request on the tagged network which generates an egress traffic that is started from the new switch port and update the switch of the new location. Forcing an ARP lookup request can be accomplished by performing a ping to another destination on the network from inside the guest operating system running in the virtual machine.
Systems affected:
All Dell EMC PowerEdge servers.
Tracking number:
173609

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