LAG, Lacp configuration on Mellanox switches

Following the user manual of mlnx_os 3.4.0012 these are the instructions for enabling lacp:

Step 1. Log in as admin.

Step 2. Enter config mode. Run:

Step 3. Create a port-channel entity. Run:

Step 4. Change back to config mode. Run:

switch > enable

switch # configure terminal

switch (config) # interface port-channel 1

switch (config interface port-channel 1) #

switch (config interface port-channel 1) # exit

switch (config) #

switch (config interface ethernet 1/4) # channel-group 1 mode on

switch (config interface ethernet 1/4) #

If the physical port is operationally up, this port becomes an active member of the

aggregation. Consequently, it becomes able to convey traffic.

switch > enable

switch # configure terminal

switch (config) # interface port-channel 1

switch (config interface port-channel 1) #

switch (config interface port-channel 1) # exit

switch (config) #

Rev 3.30

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Step 5. Enable LACP in the switch. Run:

Step 6. Add a physical port to the port-channel. Run:

switch (config) # lacp

switch (config) #

switch (config interface ethernet 1/4) # channel-group 1 mode active/passive

switch (config interface ethernet 1/4) #

Running it in lab I get the following:

(port channel 1 is already configured)

sx6036-gso [standalone: master] (config interface ethernet 1/23) # channel-group 1 mode active

% Cannot add Interface Eth1/23 with channel-group mode (active) to channel-group 1 mode (on) - Incompatible mode

sx6036-gso [standalone: master] (config interface ethernet 1/23) # channel-group 1 mode passive

% Cannot add Interface Eth1/23 with channel-group mode (passive) to channel-group 1 mode (on) - Incompatible mode

Any idea why?

Thanks,

Einav.