Link Controller - bigip_link from big3d time out

i have the same problem. as i according the KB https://support.f5.com/kb/en-us/solutions/public/13000/600/sol13690.html it worked now.

i have get rid of 3 trouble.

1, the expired certificates. so i renew a self signed cert, and sync it to /config/gtm/

2, the wrong big3d version. i upgrade ltm+lc from 10.2.2 to 11.6, the upgrade tools just only upgrade software in /usr/sbin/ , but big3d services use the execution in /shared/bin/

3, have legacy configuration item in gtm server section in /config/bigip_gtm.conf

hope this information should help