netinet6.icmp events

12/07/2023 Contributors

netinet6.icmp.chksum

Severity: ERROR
Description: This message occurs when the system receives an Internet Control Message Protocol(ICMP) message, and while processing the ICMP message it finds a checksum error.
Corrective Action: (None).
Syslog Message: ICMP6 checksum error (%d|%x) %s.
Parameters: icmpType (INT): ICMP header type field.
checksum (INTHEX): Checksum value.
ipAddress (STRING): Printable that is a loggable representation of IP address.

Severity: NOTICE
Description: This message occurs when an ICMPv6 redirect message is received. The redirect might be received due to either a misconfigured route or a man-in-the-middle ICMP redirect attack.
Corrective Action: When enabled, ICMP redirects can be disabled using the "network tuning icmp6 modify -is-v6-redirect-accepted false" command. However, disabling ICMP redirects might lead to connectivity problems or longer delays of data transfers.
Syslog Message: Received %lu ICMPv6 redirect messages for IPspace "%s".
Parameters: no_of_redirects (LONGINT): Total number of ICMPv6 redirects received for the specific IPspace.
ipspace (STRING): The IPspace for which the redirect packets are received.

Severity: ERROR
Description: This message occurs when the system rejects a redirect because both router case and on-link destination case are equal.
Corrective Action: (None).
Syslog Message: ICMP6 redirect rejected; neither router case nor onlink case: %s.
Parameters: addressBuff (STRING): Contains IP6 addresses.

Severity: INFORMATIONAL
Description: This message occurs when there is a lladdrlen mismatch for the specified IP6 address.
Corrective Action: (None).
Syslog Message: icmp6_redirect_input: lladdrlen mismatch for %s (if %d, icmp6 packet %d): %s.
Parameters: ip6address (STRING): Printable that is a loggable representation of the IP address.
mediaAddrlen (INT): Media address length.
lladdrlen (INT): Address length.
addressBuff (STRING): Contains IP6 addresses.

Severity: ERROR
Description: This message occurs when the system rejects an Internet Control Message Protocol6 (ICMP6) redirect.
Corrective Action: (None).
Syslog Message: ICMP6 redirect sent from %s rejected;It must be from the linklocal address.
Parameters: ipAddress (STRING): Printable that is a loggable representation of the IP address.

Severity: INFORMATIONAL
Description: This message occurs because of invalid neighbor discovery options.
Corrective Action: (None).
Syslog Message: icmp6_redirect_input: Invalid neighbor discovery option, rejected: %s.
Parameters: addressBuff (STRING): Contains IP6 addresses.