Table of Contents
Advertisement
Switch4:
Switch4(config)#vlan 20
Switch4(Config-Vlan20)#
Switch4(config)#vlan 30
Switch4(Config-Vlan30)#
Switch4(config)#vlan 40
Switch4(Config-Vlan40)#
Switch4(config)#vlan 50
Switch4(Config-Vlan50)#exit
Switch4(config)#spanning-tree mst configur
Switch4(Config-Mstp-Region)#name mstp
Switch4(Config-Mstp-Region)#instance 3 vlan 20;30
Switch4(Config-Mstp-Region)#insta
Switch4(Config-Mstp-Region)#exi
Switch4(config)#interface e1/1-7
Switch4(Config-Port-Range)#switc
Switch4(Config-Port-Range)#ex
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
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 on
the MSTP region, the following figure only shows the topology of the MSTP region.
exit
exit
exit
ation
nce 4 vlan 40;50
t
hport mode trunk
it
22-127
the instance 0. The port 1 in
ly valid in
Advertisement
Table of Contents
Troubleshooting
