Unable to add ports to LAG

I hope this helps, it is more of tip to troubleshooting LAG configuration between switches.

For LAG Issues or troubleshooting, here is basic way to validate and test for issues.

1. Add only 1 member port on both switch to the LAG and then check if the LAG status is up.   (1 Port member only)  You can choose you settings to match (Static, LACP, (Active, Passive --some one should be active and not both be passive), common hash method)

2. If LAG is UP and you can get traffic across, then add second Port member to the LAG and see if the LAG is up.  If LAG is not up, you have mis-match or cross cabling which is most common problem we see with LAG configuration.   Mis-match means the cable going to the port is not really connected the member LAG port so you have both a LAG port and non LAG port connected between the 2 switches.

To determine mis-match or bad cabling, disable (shutdown) one of port in the LAG and see if LAG is up.  Attempt the same on second port if still no change.