The solution at PT Activity 3.6.1:Packet Tracer Skills Integration Challenge (WAN module) exercise made by me. Comment and suggestion are welcome.

Task 1: Configure PPP with CHAP Between Devices
HQ#config t
HQ(config)#username ISP password cisco
HQ(config)#interface s0/0/1
HQ(config-if)#encapsulation ppp
HQ(config-if)#ppp authentication chap
HQ(config-if)#ip address 209.165.201.2 255.255.255.252
HQ(config-if)#no sh
HQ(config-if)#exit

Task 2: Configure Full Mesh Frame Relay
HQ(config)#interface s0/0/0
HQ(config-if)#ip address 10.0.0.1 255.255.255.248
HQ(config-if)#encapsulation frame-relay
HQ(config-if)#frame-relay map ip 10.0.0.2 102 broadcast
HQ(config-if)#frame-relay map ip 10.0.0.3 103 broadcast
HQ(config-if)#frame-relay map ip 10.0.0.4 104 broadcast ietf
HQ(config-if)#frame-relay lmi-type ansi
HQ(config-if)#no sh

WEST#conf t
WEST(config)#interface s0/0/0
WEST(config-if)#ip address 10.0.0.2 255.255.255.248
WEST(config-if)#encapsulation frame-relay
WEST(config-if)#frame-relay map ip 10.0.0.1 201 broadcast
WEST(config-if)#frame-relay map ip 10.0.0.3 203 broadcast
WEST(config-if)#frame-relay map ip 10.0.0.4 204 broadcast ietf
WEST(config-if)#frame-relay lmi-type ansi
WEST(config-if)#no sh

SOUTH#conf t
SOUTH(config)#interface s0/0/0
SOUTH(config-if)#ip address 10.0.0.3 255.255.255.248
SOUTH(config-if)#encapsulation frame-relay
SOUTH(config-if)#frame-relay map ip 10.0.0.1 301 broadcast
SOUTH(config-if)#frame-relay map ip 10.0.0.2 302 broadcast
SOUTH(config-if)#frame-relay map ip 10.0.0.4 304 broadcast ietf
SOUTH(config-if)#frame-relay lmi-type ansi
SOUTH(config-if)#no sh

EAST#conf t
EAST(config)#interface s0/0/0
EAST(config-if)#ip address 10.0.0.4 255.255.255.248
EAST(config-if)#encapsulation frame-relay ietf
EAST(config-if)#frame-relay map ip 10.0.0.1 401 broadcast cisco
EAST(config-if)#frame-relay map ip 10.0.0.2 402 broadcast cisco
EAST(config-if)#frame-relay map ip 10.0.0.3 403 broadcast cisco
EAST(config-if)#frame-relay lmi-type ansi
EAST(config-if)#no sh

Task 3: Configure Static and Default Routing
HQ#conf t
HQ(config)#ip route 10.1.100.0 255.255.255.0 10.0.0.2
HQ(config)#ip route 10.1.10.0 255.255.255.0 10.0.0.3
HQ(config)#ip route 10.1.20.0 255.255.255.0 10.0.0.3
HQ(config)#ip route 10.1.30.0 255.255.255.0 10.0.0.3
HQ(config)#ip route 10.1.99.0 255.255.255.0 10.0.0.3
HQ(config)#ip route 10.1.200.0 255.255.255.0 10.0.0.4
HQ(config)#ip route 0.0.0.0 0.0.0.0 s0/0/1

WEST#conf t
WEST(config)#ip route 10.1.10.0 255.255.255.0 10.0.0.3
WEST(config)#ip route 10.1.20.0 255.255.255.0 10.0.0.3
WEST(config)#ip route 10.1.30.0 255.255.255.0 10.0.0.3
WEST(config)#ip route 10.1.99.0 255.255.255.0 10.0.0.3
WEST(config)#ip route 10.1.200.0 255.255.255.0 10.0.0.4
WEST(config)#ip route 0.0.0.0 0.0.0.0 10.0.0.1

SOUTH#conf t
SOUTH(config)#ip route 10.1.100.0 255.255.255.0 10.0.0.2
SOUTH(config)#ip route 10.1.200.0 255.255.255.0 10.0.0.4
SOUTH(config)#ip route 0.0.0.0 0.0.0.0 10.0.0.1

EAST#conf t
EAST(config)#ip route 10.1.100.0 255.255.255.0 10.0.0.2
EAST(config)#ip route 10.1.10.0 255.255.255.0 10.0.0.3
EAST(config)#ip route 10.1.20.0 255.255.255.0 10.0.0.3
EAST(config)#ip route 10.1.30.0 255.255.255.0 10.0.0.3
EAST(config)#ip route 10.1.99.0 255.255.255.0 10.0.0.3
EAST(config)#ip route 0.0.0.0 0.0.0.0 10.0.0.1

Task 4: Configure and Test Inter-VLAN Routing
SOUTH#conf t
SOUTH(config)#interface fa0/0
SOUTH(config-if)#no sh
SOUTH(config-if)#exit
SOUTH(config)#interface fa0/0.10
SOUTH(config-subif)#encapsulation dot1Q 10
SOUTH(config-subif)#ip address 10.1.10.1 255.255.255.0
SOUTH(config-subif)#exit
SOUTH(config)#interface fa0/0.20
SOUTH(config-subif)#encapsulation dot1Q 20
SOUTH(config-subif)#ip address 10.1.20.1 255.255.255.0
SOUTH(config-subif)#exit
SOUTH(config)#interface fa0/0.30
SOUTH(config-subif)#encapsulation dot1Q 30
SOUTH(config-subif)#ip address 10.1.30.1 255.255.255.0
SOUTH(config-subif)#exit
SOUTH(config)#interface fa0/0.99
SOUTH(config-subif)#encapsulation dot1Q 99 native
SOUTH(config-subif)#ip address 10.1.99.1 255.255.255.0
SOUTH(config-subif)#exit

Task 5: Configure VTP and Trunking on the Switches
S1#conf t
S1(config)#vtp mode server
S1(config)#vtp domain CCNA
S1(config)#vtp password cisco

S2#conf t
S2(config)#vtp mode client
S2(config)#vtp domain CCNA
S2(config)#vtp password cisco

S3#conf t
S3(config)#vtp mode client
S3(config)#vtp domain CCNA
S3(config)#vtp password cisco

S1(config)#interface fa0/1
S1(config-if)#switchport mode trunk
S1(config-if)#switchport native vlan 99
S1(config-if)#exit

S1(config)#interface fa0/2
S1(config-if)#switchport mode trunk
S1(config-if)#switchport native vlan 99
S1(config-if)#exit

S1(config)#interface fa0/3
S1(config-if)#switchport mode trunk
S1(config-if)#switchport native vlan 99
S1(config-if)#exit

S1(config)#interface fa0/4
S1(config-if)#switchport mode trunk
S1(config-if)#switchport native vlan 99
S1(config-if)#exit

S1(config)#interface fa0/5
S1(config-if)#switchport mode trunk
S1(config-if)#switchport native vlan 99
S1(config-if)#exit

S2(config)#interface fa0/1
S2(config-if)#switchport mode trunk
S2(config-if)#switchport native vlan 99
S2(config-if)#exit

S2(config)#interface fa0/2
S2(config-if)#switchport mode trunk
S2(config-if)#switchport native vlan 99
S2(config-if)#exit

S2(config)#interface fa0/3
S2(config-if)#switchport mode trunk
S2(config-if)#switchport native vlan 99
S2(config-if)#exit

S2(config)#interface fa0/4
S2(config-if)#switchport mode trunk
S2(config-if)#switchport native vlan 99
S2(config-if)#exit

S3(config)#interface fa0/1
S3(config-if)#switchport mode trunk
S3(config-if)#switchport native vlan 99
S3(config-if)#exit

S3(config)#interface fa0/2
S3(config-if)#switchport mode trunk
S3(config-if)#switchport native vlan 99
S3(config-if)#exit

S3(config)#interface fa0/3
S3(config-if)#switchport mode trunk
S3(config-if)#switchport native vlan 99
S3(config-if)#exit

S3(config)#interface fa0/4
S3(config-if)#switchport mode trunk
S3(config-if)#switchport native vlan 99
S3(config-if)#exit

Task 6: Configure VLANs on the Switch
S1#conf t
S1(config)#vlan 10
S1(config-vlan)#name Faculty/Staff
S1(config-vlan)#vlan 20
S1(config-vlan)#name Students
S1(config-vlan)#vlan 30
S1(config-vlan)#name Guest(Default)
S1(config-vlan)#vlan 99
S1(config-vlan)#name Management&Native

Task 7: Configure and Verify VLAN 99
S1(config)#interface vlan 99
S1(config-if)#ip address 10.1.99.11 255.255.255.0
S1(config-if)#exit
S1(config)#ip default-gateway 10.1.99.1

S2(config)#interface vlan 99
S2(config-if)#ip address 10.1.99.12 255.255.255.0
S2(config-if)#exit
S2(config)#ip default-gateway 10.1.99.1

S3(config)#interface vlan 99
S3(config-if)#ip address 10.1.99.13 255.255.255.0
S3(config-if)#exit
S3(config)#ip default-gateway 10.1.99.1

Task 8: Configure S1 as Root for All Spanning Trees
S1(config)#spanning-tree vlan 1,10,20,30,99 priority 4096

Task 9: Assign Ports to VLANS
S2(config-if)#interface range f0/6 – 10
S2(config-if-range)#switchport mode access
S2(config-if-range)#switchport access vlan 10

S2(config-if)#interface range f0/11 – 15
S2(config-if-range)#switchport mode access
S2(config-if-range)#switchport access vlan 20

S2(config-if)#interface range f0/16 – 20
S2(config-if-range)#switchport mode access
S2(config-if-range)#switchport access vlan 30
S2(config-if-range)#exit

S2(config)#interface range f0/21 – 24
S2(config-if-range)#sh
S2(config-if-range)#exit

S2(config)#interface range g1/1 – 2
S2(config-if-range)#sh
S2(config-if-range)#exit

This post is also available in: Italian