Hi Roman, Op 18-11-2020 om 08:32 schreef Roman Mamedov: > Do you use ULA IPs (fc00::/7) for the tunnel endpoints? Those are always > depreferred compared to IPv4. See RFC 6724: Actually we do this: 10.42.42.0/24 fddd:42:42:42/64 Let us test with some other prefix. Thanks for the hint. I'll get back with results, once we have them. -- Marco