Allied Telesis management software layer 2+ fast ethernet switches manual 112 240 Stpid

Chapter 27: MSTP Commands

Note

Each time a MSTP port is reset by receiving STP BPDUs, set the migrationcheck parameter to yes, allowing the port to send MSTP BPDUs.

intportcost		Specifies the cost of a port connected to a bridge that
		is part of the same MSTP region. This is referred to as
		an internal port cost. The range is 0 to 200,000,000.
		The default setting is Auto-detect (0), which sets port
		cost depending on the speed of the port. Default
		values are 2,000,000 for 10 Mbps ports, 200,000 for a
		100 Mbps ports, and 20,000 for one gigabit ports.
portpriority		Specifies the port’s priority. This parameter is used as a
		tie breaker when two or more ports are determined to
		have equal costs to the root bridge. The range is 0 to
		240 in increments of 16. There are sixteen increments,
		as shown in Table 13 on page 426. You specify the
		increment of the desired value. The default is 128,
		which is increment 8.
		Table 13 Port Priority Value Increments
	Increment		Port	Increment	Port
			Priority		Priority
	0		0	8	128
	1		16	9	144
	2		32	10	160
	3		48	11	176
	4		64	12	192
	5		80	13	208
	6		96	14	224
	7		112	15	240
stpid		Specifies the ID number of an MSTI in which the VLAN
		of a port is a member. This parameter is used with the

INTPORTCOST and PORTPRIORITY parameters to assign different path costs and priority values to

426