The switch has the STP enabled, and the endstation is booting before the STP initialization process is complete. Specify that STP has been disabled for that VLAN, or turn off STP for the switch ports of the endstation and devices to which it is attempting to connect; then, reboot the endstation.
There are restrictions on STPD names. They cannot contain whitespaces and cannot start with a numeric value.
Check to ensure that you are adding ports that already exist in the carrier VLAN.
If you see an error similar to the following:
Error: Cannot add VLAN default port 3:5 to STP domain
NoteThis restriction is only enforced in an active STPD and when you enable STP to make sure you have a legal STP configuration.
Only one carrier VLAN can exist in a given STPD although some of the ports on the carrier VLAN can be outside the control of any STPD at the same time.
The StpdID must be identical to the VLANid of the carrier VLAN in that STPD.