London(config)#interface Loopback0
London(config-if)#ip address 10.1.1.1 255.255.255.0
London(config-if)#ip address 173.16.1.1 255.255.255.252
London(config-if)#no shutdown
London(config-if)#ip unnumbered Serial0/0
London(config-if)#tunnel source Serial0/0
London(config-if)#tunnel destination 173.16.1.5
London(config)#ip route 10.2.2.0 255.255.255.0 Tunnel0
Florence(config)#interface Loopback0
Denver(config-if)#ip address 10.2.2.1 255.255.255.0
Denver(config-if)#ip address 173.16.1.5 255.255.255.252
Denver(config-if)#no shutdown
Denver(config-if)#ip unnumbered Serial0/0
Denver(config-if)#tunnel source Serial0/0
Denver(config-if)#tunnel destination 173.16.1.1
Denver(config)#ip route 10.1.1.0 255.255.255.0 Tunnel0
London(config)#crypto isakmp enable
London(config)#crypto isakmp policy 10
London(config-isakmp)#hash md5
London(config-isakmp)#authentication pre-share
London(config-isakmp)#encryption 3des
London(config-isakmp)#group 2
London (cfg-crypto-trans)#mode transport
London(config-crypto-map)#set peer 173.16.1.5
London(config-crypto-map)#set transform-set ccsp
London(config-crypto-map)#match address 101
London(config-if)#crypto map cisco
Denver(config)#crypto isakmp enable
Denver(config)#crypto isakmp policy 10
Denver(config-isakmp)#hash md5
Denver(config-isakmp)#authentication pre-share
Denver(config-isakmp)#encryption 3des
Denver(config-isakmp)#group 2
Denver(cfg-crypto-trans)#mode transport
Denver(config-crypto-map)#set peer 173.16.1.1
Denver(config-crypto-map)#set transform-set ccsp
Denver(config-crypto-map)#match address 101
Denver(config-if)#crypto map cisco