Topology: https://imgur.com/a/zq2h1zV


PC1#show run
Building configuration...

Current configuration : 938 bytes
!
! Last configuration change at 01:53:24 UTC Sun Apr 7 2019
!
version 15.2
service timestamps debug datetime msec
service timestamps log datetime msec
!
hostname PC1
!
boot-start-marker
boot-end-marker
!
!
!
no aaa new-model
no ip routing
no ip icmp rate-limit unreachable
!
!
!
!
!
!
no ip domain lookup
no ip cef
no ipv6 cef
!
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
!
!
ip tcp synwait-time 5
!
!
!
!
!
!
!
!
!
interface FastEthernet0/0
 ip address 10.0.0.2 255.255.255.0
 no ip route-cache
 duplex full
!
interface GigabitEthernet1/0
 no ip address
 no ip route-cache
 shutdown
 negotiation auto
!
ip default-gateway 10.0.0.1
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
!
!
!
control-plane
!
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
 stopbits 1
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
 stopbits 1
line vty 0 4
 login
!
!
end
----------------------------------------------------------------------------------------------------------------
PC1#


LONDON#show run
Building configuration...

Current configuration : 1377 bytes
!
! Last configuration change at 03:00:18 UTC Sun Apr 7 2019
!
version 15.2
service timestamps debug datetime msec
service timestamps log datetime msec
!
hostname LONDON
!
boot-start-marker
boot-end-marker
!
!
!
no aaa new-model
no ip icmp rate-limit unreachable
!
!
!
!
!
!
no ip domain lookup
ip cef
no ipv6 cef
!
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
!
!
ip tcp synwait-time 5
!
!
crypto isakmp policy 100
 hash md5
 authentication pre-share
 group 5
 lifetime 5000
crypto isakmp key CISCO address 88.88.88.2      255.255.255.252
!
!
crypto ipsec transform-set T7 ah-md5-hmac esp-aes
 mode tunnel
!
crypto ipsec profile BELL
 set transform-set T7
!
!
!
!
!
!
!
interface Tunnel0
 ip address 192.168.1.1 255.255.255.0
 tunnel source GigabitEthernet1/0
 tunnel mode ipsec ipv4
 tunnel destination 88.88.88.2
 tunnel protection ipsec profile BELL
!
interface FastEthernet0/0
 ip address 10.0.0.1 255.255.255.0
 duplex full
!
interface GigabitEthernet1/0
 ip address 88.88.88.1 255.255.255.252
 negotiation auto
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
ip route 10.0.1.0 255.255.255.0 Tunnel0 192.168.1.2
!
!
!
!
control-plane
!
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
 stopbits 1
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
 stopbits 1
line vty 0 4
 login
!
!
end
----------------------------------------------------------------------------------------------------------------

AZORES#show run
Building configuration...

Current configuration : 1377 bytes
!
! Last configuration change at 03:00:07 UTC Sun Apr 7 2019
!
version 15.2
service timestamps debug datetime msec
service timestamps log datetime msec
!
hostname AZORES
!
boot-start-marker
boot-end-marker
!
!
!
no aaa new-model
no ip icmp rate-limit unreachable
!
!
!
!
!
!
no ip domain lookup
ip cef
no ipv6 cef
!
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
!
!
ip tcp synwait-time 5
!
!
crypto isakmp policy 100
 hash md5
 authentication pre-share
 group 5
 lifetime 5000
crypto isakmp key CISCO address 88.88.88.1      255.255.255.252
!
!
crypto ipsec transform-set T7 ah-md5-hmac esp-aes
 mode tunnel
!
crypto ipsec profile BELL
 set transform-set T7
!
!
!
!
!
!
!
interface Tunnel0
 ip address 192.168.1.2 255.255.255.0
 tunnel source GigabitEthernet1/0
 tunnel mode ipsec ipv4
 tunnel destination 88.88.88.1
 tunnel protection ipsec profile BELL
!
interface FastEthernet0/0
 ip address 10.0.1.1 255.255.255.0
 duplex full
!
interface GigabitEthernet1/0
 ip address 88.88.88.2 255.255.255.252
 negotiation auto
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
ip route 10.0.0.0 255.255.255.0 Tunnel0 192.168.1.1
!
!
!
!
control-plane
!
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
 stopbits 1
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
 stopbits 1
line vty 0 4
 login
!
!
end
----------------------------------------------------------------------------------------------------------------
PC4#show run
Building configuration...

Current configuration : 938 bytes
!
! Last configuration change at 03:04:47 UTC Sun Apr 7 2019
!
version 15.2
service timestamps debug datetime msec
service timestamps log datetime msec
!
hostname PC4
!
boot-start-marker
boot-end-marker
!
!
!
no aaa new-model
no ip routing
no ip icmp rate-limit unreachable
!
!
!
!
!
!
no ip domain lookup
no ip cef
no ipv6 cef
!
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
!
!
ip tcp synwait-time 5
!
!
!
!
!
!
!
!
!
interface FastEthernet0/0
 ip address 10.0.1.3 255.255.255.0
 no ip route-cache
 duplex full
!
interface GigabitEthernet1/0
 no ip address
 no ip route-cache
 shutdown
 negotiation auto
!
ip default-gateway 10.0.1.1
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
!
!
!
control-plane
!
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
 stopbits 1
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
 stopbits 1
line vty 0 4
 login
!
!
end

PC4#