I had the requirement to setup IP Hash load balancing as I have the network ports setup as follows on my 3750 stack, it is the same for each host.
switchport trunk encapsulation dot1q
switchport trunk native vlan 400
switchport trunk allowed vlan 7,65,66,69,400
switchport mode trunk
spanning-tree portfast trunk
Basically, in order to access the network , I have to setup IP hash first.
So, first there is a prerequisite; enable Tech Support Mode. See Using Tech Support Mode in ESXi 4.1 KB Article: 1017910
I also setup my host to use both of the physical interfaces I want for management, along with the current vlan tag for them.
Then I log on to the host via console.
# cat /etc/vmware/esx.conf | more
KB Article: 1011520