Esse roteador não trabalha com VPN's, apenas roteia ip, através do RIP.

cbpf-ce1#sh run
Building configuration...

Current configuration : 1221 bytes
!
version 12.1
no service single-slot-reload-enable
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname cbpf-ce1
!
logging rate-limit console 10 except errors
!
memory-size iomem 10
ip subnet-zero
!
!
no ip finger
!
call rsvp-sync
!
!
!
!
!
!
!
!
interface Loopback0
 ip address 192.168.2.1 255.255.255.0
!
interface Ethernet0/0
 ip address 133.4.2.1 255.255.255.0
 half-duplex
!
interface Serial0/0
 ip address 10.3.3.6 255.255.255.252
 no fair-queue
 clockrate 800000
!
interface Ethernet0/1
 no ip address
 shutdown
 half-duplex
!
interface Serial0/1
 no ip address
 shutdown
!
router rip
 version 2
 redistribute connected
 network 10.0.0.0
 no auto-summary
!
ip classless
no ip http server
!
!
voice-port 1/0/0
 description POTS 2000
!
voice-port 1/0/1
!
voice-port 1/1/0
 description PSTN
!
voice-port 1/1/1
!
dial-peer cor custom
!
!
!
dial-peer voice 2000 pots
 destination-pattern 2000
 port 1/0/0
!
dial-peer voice 1 pots
 destination-pattern 0
 port 1/1/0
 forward-digits all
!
dial-peer voice 5000 voip
 destination-pattern 5...
 session target ipv4:133.4.2.3
!
!
line con 0
 transport input none
line aux 0
line vty 0 4
 login
!
no scheduler allocate
end