# COSD_AGG_WITH_UNDERLYING_INTF_NOT_SUPP

## Canonical Reference

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

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

## SYSLOG Details
- **Message**: Underlying interface <variable>interface-name</variable> is not supported on AE interface
- **Help**: COSD encountered an issue with underlying interface
- **Description**: Class-of-service(CoS) aggregate interface doesn't support an underlying interface to be its child.
- **Type**: Error: An error occurred
- **Severity**: error
- **Cause**: Underlying interface on aggregate interface
- **Action**: Remove the underlying interface from the aggregate interface
- **Attributes**: interface-name
- **Facility**: LOG_DAEMON

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