Chapter 27: MSTP Commands
426
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.
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
Table 13 Port Priority Value Increments
Increment Port
Priority Increment Port
Priority
008128
1169144
2 3210160
3 4811176
4 6412192
5 8013208
6 9614224
7 112 15 240