Qtech QSW-3900-48-SFP-DC [205/245] Configure mstp interface edge interface status

Qtech QSW-3900-48-SFP-DC [205/245] Configure mstp interface edge interface status
QTECH Software Configuration Manual
15-204
15.4.5 Configure MSTP interface edge interface status
As SST, interface with edge interface attribution will turn to forwarding if it hasnt received STPpacketafter
2 sending periods when link up.
Configure it in interface configuration mode :
Configure port to be edge port
spanning-tree mst portfast
! Example :
Configure e0/0/2 to be edge port
QTECH(config-if-ethernet-0/0/2)#spanning-tree mst portfast
15.4.6 Configure MSTP interface link type
There are two types of link : one is sharing media (through hub), the other is point-to-point. Link type is
used in suggest-agree mechanism of interface fast shifting. Only point-to-point allows fast shift. Link type can be
manual configured or self-detected by STP protocol.
Configure it in interface configuration mode :
Configure detection of link type
spanning-tree mst link-type point-to-point { forcetrue | forcefalse | auto }
! Example
Configure link type of e0/0/2 to be point-to-point
QTECH(config-if-ethernet-0/0/2)#spanning-tree mst link-type point-to-point forcefalse
15.4.7 Configure MSTP interface path cost
Port path cost can be divided into internal cost and external cost. The former is the configuration parameter
based on each MSTP instance to determine topology of different instance in each MSTP region. The latter is
parameter which has nothing to do with the instance to determine CST topology consisted by each region.
Configure it in interface configuration mode :
Configure the path cost in some instance
spanning-tree mst instance instance-num cost cost
Configure external path cost
spanning-tree mst external cost cost
Example :
! Configure the path cost in instance 2 to be 10
QTECH(config-if-ethernet-0/0/2)#spanning-tree mst instance 1 cost 10
! Configure external path cost of e0/0/2 to be 10
QTECH(config-if-ethernet-0/0/2)#spanning-tree mst external cost 10
15.4.8 Configure MSTP interface priority
In MSTP, interface priority is based on each STP instance.
Configure it in interface configuration mode :
Configure interface priority in some instance
spanning-tree mst instance instance-num port-priority priority
! Configure priority of e0/0/2 in instance 1 to be 16
QTECH(config-if-ethernet-0/0/2)#spanning-tree mst instance 1 port-priority 16

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