To change the link state of the physical interface from the Management Network vmkernel:
Note: Only cards running auto-negotiation/10Mb/100Mb/1000Mb/10000Mb speeds are supported.
- Log in to the ESXi 5.0 host using Tech Support Mode with root account privilege. For more information, see Using Tech Support Mode in ESXi 4.1 and ESXi 5.x (1017910).
- Change the link status of the uplink vmnic with one of these commands:
esxcli network nic down -n vmnicX
esxcli network nic up -n vmnicX
Where X is the vmnic number (for example,vmnic0)