Qtech QSW-2910-09T-POE-AC/DC [123/212] Configure mstp net bridge privilege

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8.4.4 Configure MSTP net bridge privilege

In MSTP, the privilege of net bridge is based on the parameter of each STP example. net

bridege privilege as well as interface privilege and interface path cost determine the topology

of each STP example to construct the base of link load balance.

Configure it in global configuration mode:

 Configure privilege of net bridge in MSTP example

spanning-tree mst instance instance-num priority priority

Example:

!Confiureprivilege of net bridge in MSTP example 4 to be 4096

QTECH(config)#spanning-tree mst instance 4 priority 4096

8.4.5 Configure edge interface status of MSTP interface

As SST, after linking up of interface with edge interface attribution, if it hasn’t received any

packet in two packet-sending periods, interface will be in forwarding status.

Configure it in interface configuration mode:

 Configure interface to be edge interface

spanning-tree mst portfast

Example:

!Configure interface 2 to be edge interface

QTECH(config-if-ethernet-0/0/2)#spanning-tree mst portfast

8.4.6 Configure MSTP interface link type

Interface link type are twookinds: one is sharing medium (linking through hub), the other is

point-to-point. Link type is used in suggestion-aggression mechanism. Only the interface of

point-to-point can shift fast. Link type can be specified manually or self-detect by STP.

Example:

!Configure link type of interface 2 to be point-to-point for cefalse

QTECH(config-if-ethernet-0/0/2)#spanning-tree mst link-type point-to-

point for cefalse

8.4.7 Configure MSTP interface path cost

Interface path cost are internal cost and external cost. The former is based on each MSTP

example configured parameter to determine topology of different example in each MSTP

region. The latter is the parameter which has nothing to do with example and determine the

CST topology formed by each region.

Configure it in interface configuration mode: