The spoke SDP path cost is used by STP to calculate the path cost to the root bridge. The path cost in BPDUs received on the root port is incremented with the configured path cost for that spoke-SDP. When BPDUs are sent out of other egress spoke SDPs, the newly calculated root path cost is used.
STP suggests that the path cost is defined as a function of the link bandwidth. Because spoke SDPs are controlled by complex queuing dynamics, the STP path cost is a purely static configuration.
The default value for spoke SDP path cost is 10. This parameter can be modified within a range of 1 to 200000000 (1 is the lowest cost).
CLI syntax:
config>service>vpls>spoke-sdp>stp#
path-cost stp-path-cost