# DOT1XD_MIRROR_ERROR

## Canonical Reference

[DOT1XD_MIRROR_ERROR](https://apps.juniper.net/syslog-explorer/?msg=DOT1XD_MIRROR_ERROR)

**Canonical URL:**  
https://apps.juniper.net/syslog-explorer/?msg=DOT1XD_MIRROR_ERROR

## SYSLOG Details
- **Message**: Unable to establish mirror connection between Routing Engines: <variable>error-message</variable>
- **Help**: dot1xd could not initialize mirror subsystem
- **Description**: 802.1X Protocol process (dot1xd) could not establish the mirror connection (which supports nonstop routing) between the master and backup Routing Engines.
- **Type**: Error: An error occurred
- **Severity**: warning
- **Cause**: The master and backup Routing Engines are running incompatible versions of the JUNOS software.
- **Action**: Update the JUNOS software to compatible versions on the master and backup Routing Engines.
- **Attributes**: error-message
- **Facility**: LOG_DAEMON

## Found this message in the following releases:
- [Junos OS 24.2R1](https://apps.juniper.net/syslog-explorer/?msg=DOT1XD_MIRROR_ERROR&sw=Junos%20OS&rel=24.2R1)
- [Junos OS 23.4R1](https://apps.juniper.net/syslog-explorer/?msg=DOT1XD_MIRROR_ERROR&sw=Junos%20OS&rel=23.4R1)