RED Client-Tunnel shows "online" , but keeps yellow and no traffic is passing the tunnel.

Hi all,

i build a SG-2-SG connection via RED-Tunnel.

I use a direct cable from SG1 to SG2 (while preconfiguring).

I am able to reach the physical interface from SG2

But tunnel keeps yellow and Interface build using reds1 and redc1 don't pass traffic.

Log shows the ping - pong between interfaces:

2021:02:24-16:32:21 wstohlfw01-1 red_server[8647]: SELF: New connection from 10.10.10.2 with ID 082ac63b9280c9e (cipher AES256-GCM-SHA384), rev1<30>Feb 24 16:32:21 red_server[8647]: 082ac63b9280c9e: connected OK, pushing config
2021:02:24-16:32:21 wstohlfw01-1 red_server[8647]: 082ac63b9280c9e: command 'PING 0'
2021:02:24-16:32:21 wstohlfw01-1 red_server[8647]: id="4201" severity="info" sys="System" sub="RED" name="RED Tunnel Up" red_id="082ac63b9280c9e" forced="0"
2021:02:24-16:32:21 wstohlfw01-1 red_server[8647]: 082ac63b9280c9e: PING remote_tx=0 local_rx=0 diff=0
2021:02:24-16:32:21 wstohlfw01-1 red_server[8647]: 082ac63b9280c9e: PONG local_tx=0
2021:02:24-16:32:36 wstohlfw01-1 red_server[8647]: 082ac63b9280c9e: command 'PING 0'
2021:02:24-16:32:36 wstohlfw01-1 red_server[8647]: 082ac63b9280c9e: PING remote_tx=0 local_rx=0 diff=0
2021:02:24-16:32:36 wstohlfw01-1 red_server[8647]: 082ac63b9280c9e: PONG local_tx=0
2021:02:24-16:32:51 wstohlfw01-1 red_server[8647]: 082ac63b9280c9e: command 'PING 0'
2021:02:24-16:32:51 wstohlfw01-1 red_server[8647]: 082ac63b9280c9e: PING remote_tx=0 local_rx=0 diff=0
2021:02:24-16:32:51 wstohlfw01-1 red_server[8647]: 082ac63b9280c9e: PONG local_tx=0
2021:02:24-16:33:06 wstohlfw01-1 red_server[8647]: 082ac63b9280c9e: command 'PING 0'
2021:02:24-16:33:06 wstohlfw01-1 red_server[8647]: 082ac63b9280c9e: PING remote_tx=0 local_rx=0 diff=0
2021:02:24-16:33:06 wstohlfw01-1 red_server[8647]: 082ac63b9280c9e: PONG local_tx=0