S1>en
S1#conf t
Enter
configuration commands, one per line. End with CNTL/Z.
S1(config)#vlan
10
S1(config-vlan)#vlan
20
S1(config-vlan)#vlan
30
S1(config-vlan)#vlan
40
S1(config-vlan)#vlan
50
S1(config-vlan)#vlan
60
S1(config-vlan)#vlan
70
S1(config-vlan)#vlan
80
S1(config-vlan)#vlan
99
S1(config-vlan)#int
range f0/1-4
S1(config-if-range)#switchport
mode trunk
S1(config-if-range)#switchport
trunk native vlan 99
S1(config)#int
vlan 99
S1(config-if)#ip
add 172.17.99.11 255.255.255.0
S1(config-if)#no
shut
S1(config)#spanning-tree
mode rapid-pvst
S1(config)#spanning-tree
vlan 1,10,30,50,70 root primary
S2>en
Enter
configuration commands, one per line. End with CNTL/Z.
S2(config)#conf
t
S2(config)#int
fa0/11
S2(config-if)#switchport
mode access
S2(config-if)#switchport
access vlan 10
S2(config-if)#spanning-tree
bpduguard enable
S2(config-if)#spanning-tree
portfast
S2(config-if)#no
shut
S2(config)#int
fa0/18
S2(config-if)#switchport
mode access
S2(config-if)#switchport
access vlan 20
S2(config-if)#spanning-tree
bpduguard enable
S2(config-if)#spanning-tree
portfast
S2(config-if)#no
shut
S2(config)#int
fa0/6
S2(config-if)#switchport
mode access
S2(config-if)#switchport
access vlan 30
S2(config-if)#spanning-tree
bpduguard enable
S2(config-if)#spanning-tree
portfast
S2(config-if)#no
shut
S2(config-if)#vlan
10
S2(config-vlan)#vlan
20
S2(config-vlan)#vlan
30
S2(config-vlan)#vlan
40
S2(config-vlan)#vlan
50
S2(config-vlan)#vlan
60
S2(config-vlan)#vlan
70
S2(config-vlan)#vlan
80
S2(config-vlan)#vlan
99
S2(config-vlan)#int
range f0/1-4
S2(config-if-range)#switchport
mode trunk
S2(config-if-range)#switchport
trunk native vlan 99
S2(config)#int
vlan 99
S2(config-if)#ip
add 172.17.99.12 255.255.255.0
S2(config-if)#no
shut
S2(config)#spanning-tree
vlan 1,10,20,30,40,50,60,70,80,99 root secondary
S2(config)#spanning-tree
mode rapid-pvst
S3>en
S3(config)#conf
t
Enter
configuration commands, one per line. End with CNTL/Z.
S3(config)#vlan
10
S3(config-vlan)#vlan
20
S3(config-vlan)#vlan
30
S3(config-vlan)#vlan
40
S3(config-vlan)#vlan
50
S3(config-vlan)#vlan
60
S3(config-vlan)#vlan
70
S3(config-vlan)#vlan
80
S3(config-vlan)#vlan
99
S3(config-vlan)#int
range f0/1-4
S3(config-if-range)#switchport
mode trunk
S3(config-if-range)#switchport
trunk native vlan 99
S3(config)#spanning-tree
mode rapid-pvst
S3(config)#spanning-tree
vlan 20,40,60,80,99 root primary
S3(config)#int
vlan 99
S3(config-if)#ip
address 172.17.99.13 255.255.255.0
S3(config-if)#no
shut
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