QTECH QSW-8300 Инструкция по настройке - Manual (Page 91)

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90
Switch4(Config-Port-Range)#exit
Switch4(config)#spanning-tree
Switch4(config)#spanning-tree mst 4 priority 0
After the above configuration, Switch1 is the root bridge of the instance 0 of the entire network.
In the MSTP region which Switch2, Switch3 and Switch4 belong to, Switch2 is the region root
of the instance 0, Switch3 is the region root of the instance 3 and Switch4 is the region root of
the instance 4. The traffic of VLAN 20 and VLAN 30 is sent through the topology of the
instance 3. The traffic of VLAN 40 and VLAN 50 is sent through the topology of the instance 4.
And the traffic of other VLANs is sent through the topology of the instance 0. The port 1 in
Switch2 is the master port of the instance 3 and the instance 4.
The MSTP calculation generates 3 topologies: the instance 0, the instance 3 and the instance
4 (marked with blue lines). The ports with the mark “x” are in the status of discarding. The
other ports are the status of forwarding. Because the instance 3 and the instance 4 are only
valid in the MSTP region, the following figure only shows the topology of the MSTP region.
The Topology Of the Instance 0 after the MSTP Calculation
The Topology Of the Instance 3 after the MSTP Calculation
Switch
1
Switch
2
Switch
3
Switch4
1
1 1
X
2
2 2
3
X
3
4
4
5
5
X
6
7
6
X
x
7
X
Switch
2
Switch
3
Switch
4
2 2
3 3
X
4
4
X
5
5
X
6
7
6
x
7
X