QFX VC as part of EVPN - redundancy not working

[Giovanni Bellac]

Hi all,
I am using a QFX5100 2-member-VC as a L2 gateway in a centrally routed EVPN/VXLAN setup. It seems that the VC redundancy does not work in this configuration properly. For test purposes I am promoting the backup-RE as master-RE and afterwards restarting the old master-RE (now backup-RE). While restarting the backup-RE member the connection to the servers is always lost. The servers are connected to both members via LACP.
I have tried several JunOS versions (21.1.R1, 20.4R2-S2, 20.2R2-S3, 19.4R3-S3) but the results are always the same.

Any suggestions to get this work as intended?
Kind regardsGiovanni