Alcatel-Lucent 7750 SR OS Service Manual page 658

VPLS Service Configuration Commands
exception
Syntax [no] exception
Context debug>service>stp
Description
This command enables STP debugging for exceptions.
fsm-state-changes
Syntax [no] fsm-state-changes
Context debug>service>stp
Description
This command enables STP debugging for FSM state changes.
fsm-timers
Syntax [no] fsm-timers
Context debug>service>stp
Description
This command enables STP debugging for FSM timer changes.
port-role
Syntax [no] port-role
Context debug>service>stp
Description
This command enables STP debugging for changes in port roles.
port-state
Syntax [no] port-state
Context debug>service>stp
Description
This command enables STP debugging for port states.
sap
Syntax [no] sap sap-id
Context debug>service>stp
Description
This command enables STP debugging for a specific SAP.
Page 658 7750 SR OS Services Guide