[  255.986339][    C2] TCP: AO hash mismatch for [2001:db8:1::1].44428->[2001:db8:254::1].7011 [P.]L3index: 0
[  255.987265][    C3] TCP: AO hash mismatch for [2001:db8:254::1].7011->[2001:db8:1::1].44428 [P.]L3index: 0
[  256.539929][    C0] TCP: request_sock_TCPv6: Possible SYN flooding on port [2001:db8:254::1]:7010. Sending cookies.
[  257.010222][    C1] TCP: AO hash mismatch for [2001:db8:254::1].7012->[2001:db8:1::1].59478 [P.]L3index: 0
[  257.010599][    C0] TCP: AO hash mismatch for [2001:db8:1::1].59478->[2001:db8:254::1].7012 [P.]L3index: 0