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Virtual machine loses network connectivity after a migration from an ESXi 5.1/5.5 host to an ESXi/ESX 4.1 or ESXi 5.0 host (2038301)

Symptoms

After performing a vMotion of a virtual machine from an ESXi 5.1/5.5 host to an ESXi/ESX 4.1 host or an ESXi 5.0 host, you experience these symptoms:
  • The virtual machine gets disconnected from the network
  • Virtual machine loses network connectivity when using VDS
  • Virtual machine loses network connectivity after the migration when using VDS dvPortGroup
  • Virtual machine regains network connectivity if it is migrated back to an ESXi 5.1/5.5 host
  • In ESXi 5.0 log files, you see entries similar to:

T19:11:33.142Z cpu11:10382050)NetPort: 2602: resuming traffic on DV port 5902
T19:11:33.142Z cpu11:10382050)WARNING: NetDVS: 1477: failed to init client for data com.server.etherswitch.port.teaming on port 5902
T19:11:33.142Z cpu11:10382050)WARNING: NetPort: 1245: failed to enable port 0x30002e1: Bad parameter
T19:11:33.142Z cpu11:10382050)NetPort: 1427: disabled port 0x30002e1
T19:11:33.142Z cpu11:10382050)WARNING: Net: vm 10382050: 207: cannot enable port 0x30002e1: Bad parameter
T19:11:33.142Z cpu11:10382050)Net: 1652: connected DataNode4.eth1 eth1 to vDS, portID 0x30002e2
T19:11:33.142Z cpu11:10382050)Net: 1985: associated dvPort 5787 with portID 0x30002e2
T19:11:33.142Z cpu11:10382050)NetPort: 2602: resuming traffic on DV port 5787
T19:11:33.142Z cpu11:10382050)WARNING: NetDVS: 1477: failed to init client for data com.server.etherswitch.port.teaming on port 5787
T19:11:33.142Z cpu11:10382050)WARNING: NetPort: 1245: failed to enableport 0x30002e2: Bad parameter
T19:11:33.142Z cpu11:10382050)NetPort: 1427: disabled port 0x30002e2
T19:11:33.142Z cpu11:10382050)WARNING: Net: vm 10382050: 207: cannot enable port 0x30002e2: Bad parameter
T19:11:33.143Z cpu11:10382050)Net: 1652: connected DataNode4.eth0 eth0 to vDS, portID 0x30002e3
T19:11:33.143Z cpu11:10382050)Net: 1985: associated dvPort 5839 with portID 0x30002e3
T19:11:33.149Z cpu11:10382050)NetPort: 2602: resuming traffic on DV port 5839
T19:11:33.149Z cpu11:10382050)WARNING: NetDVS: 1477: failed to init client for data com.server.etherswitch.port.teaming on port 5839
T19:11:33.149Z cpu11:10382050)WARNING: NetPort: 1245: failed to enable port 0x30002e3: Bad parameter
T19:11:33.149Z cpu11:10382050)NetPort: 1427: disabled port 0x30002e3
T19:11:33.149Z cpu11:10382050)WARNING: Net: vm 10382050: 207: cannot enable port 0x30002e3: Bad parameter
T19:11:33.187Z cpu8:53011)Config: 346: "SIOControlFlag2" = 0, Old Value: 1, (Status: 0x0)

  • In the ESX 4.1 vmkernel log file, you see entries similar to:

0:00:52:03.785 cpu18:4567)VMotion: 4685: 1353178280579067 D: Resume handshake successful
0:00:52:03.785 cpu14:4578)Swap: vm 4567: 9131: Starting prefault for the migration swap file
vmkernel: 0:00:52:03.798 cpu14:4578)Swap: vm 4567: 9270: Finish swapping in migration swap file. (faulted 0 pages, pshared 0 pages). Success.
vmkernel: 0:00:52:03.847 cpu18:4576)NetPort: 2256: resuming traffic on DV port 319
vmkernel: 0:00:52:03.847 cpu18:4576)WARNING: NetDVS: 1460: failed to init client for data com.vmware.etherswitch.port.teaming on port 319
vmkernel: 0:00:52:03.847 cpu18:4576)WARNING: NetPort: 986: failed to enable port 0x3000013: Bad parameter
vmkernel: 0:00:52:03.847 cpu18:4576)NetPort: 1165: disabled port 0x3000013

Cause

The maximum length of dvUplink name in ESX/ESXi 4.1 and ESXi 5.0 is 32 characters, but in ESXi 5.1/5.5 the maximum dvUplink name length is 81 characters. When performing a vMotion from ESXi 5.1/5.5 to ESX/ESXi 4.1 or ESXi 5.0, the maximum supported dvUplink name length is 32 characters. If the dvUplink name length is longer than 32 characters in ESXi 5.1/5.5 after vMotion to ESX/ESXi 4.1 or ESXi 5.0, the VDS port might lose connection.

Resolution


To workaround this issue, you can perform one or more of the following actions:
  • Ensure that the dvUplink name consists of 31 or lesser characters.
  • Change the port group of the virtual machine to another network and then revert it to the original port group.
  • Power off the virtual machine which is having the issue on ESXi 5.1/5.5, migrate it to ESXi/ESX 4.1, and then power on the virtual machine in ESXi/ESX 4.1. This resolves the network connectivity issue.

See Also

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