ICCP connection between Junos based box (i.e ACX5448) and EVO based box (i.e. ACX7100) failed when authentication key configured using knob (authentication-key <key>)

ICCP connection keep in progress state when use authentication key as shown below
 

set protocols iccp authentication-key <key>

user@acx7100w-a# run show iccp detail 
Redundancy Group Information for peer xx.xx.xx.xx
  TCP Connection       : In progress       >>>>>>> keep in progress state
  Liveliness Detection : Unknown
  Redundancy Group ID          Status
    100                         Down 

Client Application: lacpd
  Redundancy Group IDs Joined: 100 

Client Application: l2ald_iccpd_client
  Redundancy Group IDs Joined: 100

This issue is related to the using of different socket options to enable TCP MD5 on Junos and EVO . issue fixed in PR1710448 .

as workaround, customer deactivate the authentication key over ICCP configuration :

deactivate protocols iccp authentication-key