To confirm the network coredump is enabled, run this command:
#esxcli system coredump network get
Enabled: true
Host VNic: vmk0
Network Server IP: XXX.XXX.XXX.XXX
Network Server Port: 6500
For example, if you have more than one Management Network interface configured and one of them is dedicated for use with network dump then you may have to disable the debugger using esxcli before migrating that active management vmkernel interface from VSS to VDS:
esxcli system coredump network set --enable false
Migrate the interface after disabling network coredump functionality and verify if the esxcfg-vswitch -l shows only one used port for the Management network.