Answer / jitu

ok i am going to expalin at first how we cretae vpn on cisco
router first then it will be easy for understand to you on
l3 switches and l2 switches

ok let start

VPN=that is virtual private network it is set on the
workstaion or workdoamin such that any autrized person can
acess his network from out side network
this vpn can be configured by two process

1 pptp that is point to point tunlinh protoccol Microsoft
Point-to-Point Encryption Protocol (MPPE).


network diagram

pc-----internet-----router--------workstaions

pc=with pptp
internet ip=172.16.142.191
routere ethernet=10.130.13.13

now start

2621#configure termina
#vpdn enable
#vpdn-group 1
2621(config-vpdn)#accept-dialin
2621(config-vpdn-acc-in)#protocol pptp

2621(config-vpdn-acc-in)#virtual-template 1
2621(config-vpdn-acc-in)#exit

2621(config)#ip local pool test 192.168.1.1 192.168.1.250

2621(config)#interface virtual-template 1

2621(config-if)#encapsulation ppp
2621(config-if)#peer default ip address pool test
2621(config-if)#ip unnumbered FastEthernet0/0
2621(config-if)#no keepalive
2621(config-if)#ppp encrypt mppe auto
2621(config-if)#ppp authentication pap chap ms-chap





Cisco 2621 Router

2621#show run
Building configuration...

Current configuration : 1566 bytes
!
version 12.2
service timestamps debug datetime msec localtime
service timestamps log datetime msec localtime
no service password-encryption
!
hostname 2621
!
boot system flash
logging queue-limit 100
enable secret 5 $1$dGFC$VA28yOWzxlCKyj1dq8SkE/
!
ip subnet-zero
ip cef
!
!
no ip domain lookup
ip domain name cisco.com
!
vpdn enable

!--- Enable VDPN.

!
vpdn-group 1

!--- Default PPTP VPDN group.

accept-dialin
protocol pptp
virtual-template 1
!
!
!
!
!
!
!
!
!
!
voice call carrier capacity active
!
!
!
!
!
!
!
no voice hpi capture buffer
no voice hpi capture destination
!
!
mta receive maximum-recipients 0
!
!
controller T1 0/0
framing sf
linecode ami
!
controller T1 0/1
framing sf
linecode ami
!
!
!
interface Loopback0
ip address 10.100.100.1 255.255.255.0
ip nat inside
!
interface FastEthernet0/0
ip address 172.16.142.191 255.255.255.0
no ip route-cache
no ip mroute-cache
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 10.130.13.13 255.255.0.0
duplex auto
speed auto
!

!--- Create virtual-template interface used for cloning
!--- virtual-access interfaces with the use of address pool test
!--- with CHAP authentication, PAP, and MS-CHAP.

interface Virtual-Template1
ip unnumbered FastEthernet0/0
peer default ip address pool test
no keepalive
ppp encrypt mppe auto
ppp authentication pap chap ms-chap
!

!--- Create IP pool named test and specify IP range.

ip local pool test 192.168.1.1 192.168.1.250
no ip http server
no ip http secure-server
ip classless
ip route 0.0.0.0 0.0.0.0 172.16.142.1
!
ip pim bidir-enable
!
!
!
call rsvp-sync
!
!
mgcp profile default
!
dial-peer cor custom
!
!
!
!
!
line con 0
exec-timeout 0 0
line aux 0
line vty 0 4
password *************
login
!
!
end



this is the confrgation
expalnation of each steps i will give letter
this is my confrgation so some output is omited

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