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

## SYSLOG Details
- **Message**: Versions of BFD mirror software on Routing Engines are incompatible: <variable>error-message</variable>
- **Help**: Mirror versions were incompatible on Routing Engines
- **Description**: While trying to establish the mirror connection (which supports nonstop routing) between the master and backup Routing Engines, the Bidirectional Forwarding Detection process (bfdd) determined that the versions of Junos OS on the Routing Engines were incompatible.
- **Type**: Error: An error occurred
- **Severity**: warning
- **Cause**: -
- **Action**: Update the Junos OS 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 26.2R1](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS&rel=26.2R1)
- [Junos OS 25.4R1](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS&rel=25.4R1)
- [Junos OS 25.2R2](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS&rel=25.2R2)
- [Junos OS 25.2R1](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS&rel=25.2R1)
- [Junos OS 24.4R2](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS&rel=24.4R2)
- [Junos OS 24.4R1](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS&rel=24.4R1)
- [Junos OS 24.2R2](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS&rel=24.2R2)
- [Junos OS 24.2R1](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS&rel=24.2R1)
- [Junos OS 23.4R2](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS&rel=23.4R2)
- [Junos OS 23.4R1](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS&rel=23.4R1)
- [Junos OS 23.2R2](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS&rel=23.2R2)
- [Junos OS 23.2R1](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS&rel=23.2R1)
- [Junos OS 22.4R3](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS&rel=22.4R3)
- [Junos OS 22.4R2](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS&rel=22.4R2)
- [Junos OS 22.4R1](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS&rel=22.4R1)
- [Junos OS 22.2R3](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS&rel=22.2R3)
- [Junos OS 22.2R2](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS&rel=22.2R2)
- [Junos OS 22.2R1](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS&rel=22.2R1)
- [Junos OS Evolved 26.2R1](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS%20Evolved&rel=26.2R1)
- [Junos OS Evolved 25.4R1](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS%20Evolved&rel=25.4R1)
- [Junos OS Evolved 25.2R2](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS%20Evolved&rel=25.2R2)
- [Junos OS Evolved 25.2R1](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS%20Evolved&rel=25.2R1)
- [Junos OS Evolved 24.4R2](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS%20Evolved&rel=24.4R2)
- [Junos OS Evolved 24.4R1](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS%20Evolved&rel=24.4R1)
- [Junos OS Evolved 24.2R1](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS%20Evolved&rel=24.2R1)
- [Junos OS Evolved 23.4R2](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS%20Evolved&rel=23.4R2)
- [Junos OS Evolved 23.4R1](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS%20Evolved&rel=23.4R1)
- [Junos OS Evolved 23.2R2](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS%20Evolved&rel=23.2R2)
- [Junos OS Evolved 23.2R1](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS%20Evolved&rel=23.2R1)
- [Junos OS Evolved 22.4R3](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS%20Evolved&rel=22.4R3)
- [Junos OS Evolved 22.4R2](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS%20Evolved&rel=22.4R2)
- [Junos OS Evolved 22.2R3](https://apps.juniper.net/syslog-explorer/?msg=BFDD_MIRROR_VERSION_MISMATCH&sw=Junos%20OS%20Evolved&rel=22.2R3)