BSTP_PDU_F_ALT    115 net/bridgestp.c #define	BSTP_PDU_F_ALT		0x01		/* Alt/Backup port (01) */
BSTP_PDU_F_ALT    239 net/if_bridge.h #define	BSTP_PDU_F_ALT		0x01		/* Alt/Backup port (01) */