R2#sh run | b Tun
interface Tunnel0
 ip address 24.24.24.2 255.255.255.0
 ip pim sparse-dense-mode
 keepalive 10 3
 tunnel source FastEthernet0/1
 tunnel destination 180.40.7.130
!


R4#sh run int tu 0
Building configuration...

Current configuration : 167 bytes
!
interface Tunnel0
 ip address 24.24.24.4 255.255.255.0
 ip pim sparse-dense-mode
 keepalive 10 3
 tunnel source FastEthernet0/0
 tunnel destination 180.40.7.98
!
ip mroute 0.0.0.0 0.0.0.0 Tunnel0