Configure Cisco Switch for FreeNAS LACP link aggregation

Lets configure GigabitEthernet0/31 and GigabitEthernet0/31  switch (SW) for LACP link aggregation

SW>enable
SW#configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
SW(config)#interface range GigabitEthernet0/31 - 32
SW(config-if-range)#no shut
SW(config-if-range)#channel-group 1 mode passive
Creating a port-channel interface Port-channel 1
SW(config-if-range)#end
SW#

For check the EtherChannel LACP configuration you can use either the show etherchannel summary or show etherchannel detail commands

SW#show etherchannel sum
SW#show etherchannel summary 
Flags:  D - down        P - bundled in port-channel
        I - stand-alone s - suspended
        H - Hot-standby (LACP only)
        R - Layer3      S - Layer2
        U - in use      f - failed to allocate aggregator

        M - not in use, minimum links not met
        u - unsuitable for bundling
        w - waiting to be aggregated
        d - default port


Number of channel-groups in use: 1
Number of aggregators:           1

Group  Port-channel  Protocol    Ports
------+-------------+-----------+-----------------------------
1      Po1(SU)         LACP      Gi0/31(P)   Gi0/32(P)