#show etherchannel summary
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3 Po3(SD) - Gi1/0/5(s) Gi1/0/6(s)
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This says your port channel is down at layer2 and both ports are currently suspended. Can you do a show run interface port-channel3 and show us the output.
Did you enable port-channeling on your hosts using the cli or via the gui? Maybe you need to restart/refresh the networking for the vim-cmd to take...
some old working configs I have are as follows:
port-channel load-balance src-dst-ip
interface Port-channel1
switchport trunk encapsulation dot1q
switchport mode trunk
!interface GigabitEthernet1/0/1
description Trunk link to Core ESXi host 1
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 1 mode on
!
interface GigabitEthernet2/0/1
description Trunk link to Core ESXi host 1
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 1 mode on
!What you want to see:
Group Port-channel Protocol Ports
------+-------------+-----------+-----------------------------------------------
1 Po1(SU) - Gi1/0/1(P) Gi2/0/1(P)Port-channel1 is up, line protocol is up (connected)
Hardware is EtherChannel, address is f025.7204.8581 (bia f025.7204.8581)
MTU 1500 bytes, BW 2000000 Kbit, DLY 10 usec,