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

## SYSLOG Details
- **Message**: <variable>function-name</variable>: CB-<variable>cb-slot</variable>:SIB[<variable>sib-slot</variable>]-PLX disabling upstream port failed!!!
- **Help**: Failed to Disable/Enable upstream ports on SIB PLX to CB0/CB1
- **Description**: Disable/Enable upstream ports on SIB PLX to CB0/CB1 failed due to communication fail
- **Type**: Internal: Internal log message
- **Severity**: error
- **Cause**: -
- **Action**: -
- **Attributes**: function-name
cb-slot
sib-slot
- **Facility**: LOG_DAEMON

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