R1
sysname R1
interface GigabitEthernet 0/0/0
ip address 192.168.1.1 255.255.255.0
interface Serial 4/0/0
ip address 15.1.1.1 255.255.255.0
link-protocol ppp
ppp pap send-username R1 password simple R1Pass
interface Tunnel 0/0/0
ip address 10.1.1.1 255.255.255.0
tunnel-protocol gre
source 15.1.1.1
destination 10.1.1.2
interface Tunnel 0/0/1
ip address 10.1.2.1 255.255.255.0
tunnel-protocol gre p2mp
source Serial 4/0/0
nhrp entry 10.1.2.2 25.1.1.2 register
nhrp entry 10.1.2.3 35.1.1.3 register
rip 1
version 2
network 10.0.0.0
network 15.0.0.0
network 192.168.1.0
R2
sysname R2
interface GigabitEthernet 0/0/0
ip address 192.168.2.1 255.255.255.0
interface Serial 4/0/0
ip address 25.1.1.2 255.255.255.0
link-protocol ppp
ppp chap user R2
ppp chap password simple R2Pass
interface Tunnel 0/0/1
ip address 10.1.2.2 255.255.255.0
tunnel-protocol gre p2mp
source Serial 4/0/0
nhrp entry 10.1.2.1 15.1.1.1
rip 1
version 2
network 10.0.0.0
network 25.0.0.0
network 192.168.2.0
R3
sysname R3
interface GigabitEthernet 0/0/0
ip address 192.168.3.1 255.255.255.0
interface Serial 4/0/0
ip address 35.1.1.3 255.255.255.0
link-protocol hdlc
interface Tunnel 0/0/1
ip address 10.1.2.3 255.255.255.0
tunnel-protocol gre p2mp
source Serial 4/0/0
nhrp entry 10.1.2.1 15.1.1.1
rip 1
version 2
network 10.0.0.0
network 35.0.0.0
network 192.168.3.0
R4
sysname R4
interface GigabitEthernet 0/0/0
ip address 192.168.4.1 255.255.255.0
interface GigabitEthernet 0/0/1
ip address 45.1.1.2 255.255.255.0
interface Tunnel 0/0/0
ip address 10.1.1.2 255.255.255.0
tunnel-protocol gre
source 45.1.1.2
destination 15.1.1.1
rip 1
version 2
network 10.0.0.0
network 45.0.0.0
network 192.168.4.0
R5
sysname R5
interface GigabitEthernet 0/0/0
ip address 5.5.5.1 255.255.255.0
interface Serial 3/0/1
ip address 25.1.1.1 255.255.255.0
link-protocol ppp
ppp pap authentication
ppp chap authentication
interface Serial 4/0/0
ip address 15.1.1.2 255.255.255.0
link-protocol ppp
ppp pap authentication
ppp chap authentication
interface Serial 4/0/1
ip address 35.1.1.1 255.255.255.0
link-protocol hdlc
interface LoopBack 0
ip address 5.5.5.5 255.255.255.0
rip 1
version 2
network 5.0.0.0
network 15.0.0.0
network 25.0.0.0
network 35.0.0.0