Nexus 9k config- i have used force keyword as well...interface port-channel10interface Ethernet1/1  channel-group 10 mode activeinterface Ethernet1/2  channel-group 10 mode activeGroup Port-       Type     Protocol  Member Ports      Channel--------------------------------------------------------------------------------10    Po10(SD)    Eth      LACP      Eth1/1(s)    Eth1... (more)

For Nexus 9K Enable LACP if you want LACP based port channels. All Layer 2 member ports must run in full-duplex mode and at the same speed. Interface e1/1 channel-group channel-number [force ] [mode {on | active | passive }] Force keyword Forces an interface with some incompatible configurations to join the channel. For Cisco 3850 int g1/0/9 channel-group channel-number mode { on |... (more)