R2#

crypto isakmp policy 10
 authentication pre-share
crypto isakmp key cisco address 180.40.7.3
!
!
crypto ipsec transform-set Prob11 ah-sha-hmac
!
crypto map Prob11 10 ipsec-isakmp
 set peer 180.40.7.3
 set transform-set Prob11
 match address 102
!
interface Serial1/2
 ip address 180.40.7.2 255.255.255.224
 clock rate 64000
 crypto map Prob11


access-list 102 deny   ospf any any
access-list 102 permit ip any any


R3#
crypto isakmp policy 10
 authentication pre-share
crypto isakmp key cisco address 180.40.7.2
!
!
crypto ipsec transform-set Prob11 ah-sha-hmac
!
crypto map Prob11 10 ipsec-isakmp
 set peer 180.40.7.2
 set transform-set Prob11
 match address 102
!
interface Serial1/2
 ip address 180.40.7.3 255.255.255.224
 clock rate 64000
 crypto map Prob11


access-list 102 deny   ospf any any
access-list 102 permit ip any any