# [MACSEC_CAK_ZERO_VALIDATION_ERROR](https://apps.juniper.net/syslog-explorer/?msg=MACSEC_CAK_ZERO_VALIDATION_ERROR)

## SYSLOG Details
- **Message**: CKN has to be even nibbles (even hexadecimal digits)
- **Help**: Failed to validate that MACsec CAK is not all zeroes
- **Description**: The CAK must not be all zeroes to satisfy certain security requirements
- **Type**: Error: An error occurred
- **Severity**: error
- **Cause**: -
- **Action**: -
- **Attributes**: -
- **Facility**: ANY

## Found this message in the following releases:
- [Junos OS 26.2R1](https://apps.juniper.net/syslog-explorer/?msg=MACSEC_CAK_ZERO_VALIDATION_ERROR&sw=Junos%20OS&rel=26.2R1)
- [Junos OS 25.4R1](https://apps.juniper.net/syslog-explorer/?msg=MACSEC_CAK_ZERO_VALIDATION_ERROR&sw=Junos%20OS&rel=25.4R1)
- [Junos OS 25.2R2](https://apps.juniper.net/syslog-explorer/?msg=MACSEC_CAK_ZERO_VALIDATION_ERROR&sw=Junos%20OS&rel=25.2R2)
- [Junos OS 25.2R1](https://apps.juniper.net/syslog-explorer/?msg=MACSEC_CAK_ZERO_VALIDATION_ERROR&sw=Junos%20OS&rel=25.2R1)
- [Junos OS 24.4R2](https://apps.juniper.net/syslog-explorer/?msg=MACSEC_CAK_ZERO_VALIDATION_ERROR&sw=Junos%20OS&rel=24.4R2)
- [Junos OS 24.4R1](https://apps.juniper.net/syslog-explorer/?msg=MACSEC_CAK_ZERO_VALIDATION_ERROR&sw=Junos%20OS&rel=24.4R1)
- [Junos OS 24.2R2](https://apps.juniper.net/syslog-explorer/?msg=MACSEC_CAK_ZERO_VALIDATION_ERROR&sw=Junos%20OS&rel=24.2R2)
- [Junos OS 24.2R1](https://apps.juniper.net/syslog-explorer/?msg=MACSEC_CAK_ZERO_VALIDATION_ERROR&sw=Junos%20OS&rel=24.2R1)
- [Junos OS 23.4R2](https://apps.juniper.net/syslog-explorer/?msg=MACSEC_CAK_ZERO_VALIDATION_ERROR&sw=Junos%20OS&rel=23.4R2)
- [Junos OS 23.4R1](https://apps.juniper.net/syslog-explorer/?msg=MACSEC_CAK_ZERO_VALIDATION_ERROR&sw=Junos%20OS&rel=23.4R1)