99
Configuring IPSec VPN:
HUB(config)#crypto isakmp policy 10
HUB(config-isakmp)#authentication pre
HUB(config-isakmp)#encryption des
HUB(config-isakmp)#hash md5
HUB(config-isakmp)#group 2
HUB(config-isakmp)#exit
HUB(config)#crypto isakmp key inhand add 0.0.0.0
HUB(config)#
HUB(config)#crypto ipsec transform-set TS esp-des esp-md5-hmac
HUB(cfg-crypto-trans)#mode tunnel
HUB(cfg-crypto-trans)#exit
HUB(config)#crypto ipsec profile POLICY
HUB(ipsec-profile)#set transform-set TS
HUB(ipsec-profile)#exit
HUB(config)#int tunnel 0
HUB(config-if)#tunnel protection ipsec profile POLICY
==>R2/R3/R4 Configuring:
crypto isakmp policy 10
hash md5
authentication pre-share
group 2
crypto isakmp key inhand address 0.0.0.0 0.0.0.0
!
crypto ipsec transform-set TS esp-des esp-md5-hmac
!
crypto ipsec profile POLICY
set transform-set TS
int tun 0
tunnel prote ipsec pro POLICY
2: Configuring Tunnel GRE
HUB Configuring:
interface Tunnel0
ip address 192.168.77.1 255.255.255.0
tunnel source FastEthernet0/1
tunnel mode gre multipoint
tunnel key 123