# COSD_TRICOLOR_NOT_SUPPORTED

## Canonical Reference

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

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

## SYSLOG Details
- **Message**: <variable>function-name</variable>:<variable>line-number</variable> : Unable to apply scheduler <variable>scheduler-map</variable> to interface <variable>interface-name</variable>, because it does not support tricolor marking
- **Help**: Interface does not support tricolor marking
- **Description**: The class-of-service (CoS) process (cosd) did not apply the indicated scheduler map to the indicated interface, because a scheduler included in the map specifies a packet loss priority (PLP) that is supported only with tricolor marking (TCM). The interface does not support TCM, either because TCM is not enabled or the interface is on a router that does not support TCM. In terms of configuration, the value 'medium-high' or 'medium-low' is specified for the 'loss-priority' statement in a scheduler definition at the [edit class-of-service schedulers &lt;scheduler-name> drop-profile-map] hierarchy level. The scheduler is included in the scheduler map applied to the interface, but the 'tri-color' statement is either not included at the [edit class-of-service] hierarchy level, or is not supported.
- **Type**: Error: An error occurred
- **Severity**: error
- **Cause**: -
- **Action**: Change the value of the 'loss-priority' statement in the scheduler or include the 'tri-color' statement to enable TCM on the router.
- **Attributes**: function-name
line-number
scheduler-map
interface-name
- **Facility**: LOG_DAEMON

## Found this message in the following releases:
- [Junos OS 26.2R1](https://apps.juniper.net/syslog-explorer/?msg=COSD_TRICOLOR_NOT_SUPPORTED&sw=Junos%20OS&rel=26.2R1)
- [Junos OS 25.4R1](https://apps.juniper.net/syslog-explorer/?msg=COSD_TRICOLOR_NOT_SUPPORTED&sw=Junos%20OS&rel=25.4R1)
- [Junos OS 25.2R2](https://apps.juniper.net/syslog-explorer/?msg=COSD_TRICOLOR_NOT_SUPPORTED&sw=Junos%20OS&rel=25.2R2)
- [Junos OS 25.2R1](https://apps.juniper.net/syslog-explorer/?msg=COSD_TRICOLOR_NOT_SUPPORTED&sw=Junos%20OS&rel=25.2R1)
- [Junos OS 24.4R2](https://apps.juniper.net/syslog-explorer/?msg=COSD_TRICOLOR_NOT_SUPPORTED&sw=Junos%20OS&rel=24.4R2)
- [Junos OS 24.4R1](https://apps.juniper.net/syslog-explorer/?msg=COSD_TRICOLOR_NOT_SUPPORTED&sw=Junos%20OS&rel=24.4R1)
- [Junos OS 24.2R2](https://apps.juniper.net/syslog-explorer/?msg=COSD_TRICOLOR_NOT_SUPPORTED&sw=Junos%20OS&rel=24.2R2)
- [Junos OS 24.2R1](https://apps.juniper.net/syslog-explorer/?msg=COSD_TRICOLOR_NOT_SUPPORTED&sw=Junos%20OS&rel=24.2R1)
- [Junos OS 23.4R2](https://apps.juniper.net/syslog-explorer/?msg=COSD_TRICOLOR_NOT_SUPPORTED&sw=Junos%20OS&rel=23.4R2)
- [Junos OS 23.4R1](https://apps.juniper.net/syslog-explorer/?msg=COSD_TRICOLOR_NOT_SUPPORTED&sw=Junos%20OS&rel=23.4R1)
- [Junos OS 23.2R2](https://apps.juniper.net/syslog-explorer/?msg=COSD_TRICOLOR_NOT_SUPPORTED&sw=Junos%20OS&rel=23.2R2)
- [Junos OS 23.2R1](https://apps.juniper.net/syslog-explorer/?msg=COSD_TRICOLOR_NOT_SUPPORTED&sw=Junos%20OS&rel=23.2R1)
- [Junos OS 22.4R3](https://apps.juniper.net/syslog-explorer/?msg=COSD_TRICOLOR_NOT_SUPPORTED&sw=Junos%20OS&rel=22.4R3)
- [Junos OS 22.4R2](https://apps.juniper.net/syslog-explorer/?msg=COSD_TRICOLOR_NOT_SUPPORTED&sw=Junos%20OS&rel=22.4R2)
- [Junos OS 22.4R1](https://apps.juniper.net/syslog-explorer/?msg=COSD_TRICOLOR_NOT_SUPPORTED&sw=Junos%20OS&rel=22.4R1)
- [Junos OS 22.2R3](https://apps.juniper.net/syslog-explorer/?msg=COSD_TRICOLOR_NOT_SUPPORTED&sw=Junos%20OS&rel=22.2R3)
- [Junos OS 22.2R2](https://apps.juniper.net/syslog-explorer/?msg=COSD_TRICOLOR_NOT_SUPPORTED&sw=Junos%20OS&rel=22.2R2)
- [Junos OS 22.2R1](https://apps.juniper.net/syslog-explorer/?msg=COSD_TRICOLOR_NOT_SUPPORTED&sw=Junos%20OS&rel=22.2R1)