[  256.348902][    C3] TCP: AO hash mismatch for [2001:db8:254::1].7011->[2001:db8:1::1].32858 [P.]L3index: 0
[  256.349523][    C3] TCP: AO hash mismatch for [2001:db8:1::1].32858->[2001:db8:254::1].7011 [P.]L3index: 0
[  257.372913][    C2] TCP: AO hash mismatch for [2001:db8:1::1].41250->[2001:db8:254::1].7012 [P.]L3index: 0
[  257.373435][    C2] TCP: AO hash mismatch for [2001:db8:254::1].7012->[2001:db8:1::1].41250 [P.]L3index: 0
[  257.746995][    C2] TCP: request_sock_TCPv6: Possible SYN flooding on port [2001:db8:254::1]:7010. Sending cookies.