This counter reports the number of errors that were not sent as ICMP error messages because the datagram that caused the error was itself an ICMP message, following the standard rule against generating ICMP errors in response to ICMP errors. An admin would see this incrementing as the device correctly avoids ICMP error loops. For example, this counter rising after a burst of malformed ICMP traffic shows the device is properly suppressing recursive ICMP error generation rather than amplifying the problem.