Hub Router configure HUB(config)#interface Tunnel1 HUB(config-if)# ip address 10.10.10.1 255.255.255.0 HUB(config-if)# tunnel source FastEthernet0/0 HUB(config-if)# tunnel mode gre multipoint HUB(config-if)# ip nhrp map multicast dynamic HUB (config-if)#ip nhrp authentication OutBox HUB(config-if)# ip nhrp network-id 100 SPOKE Router interface Tunnel1 Spoke_01(config-if)# ip address 10.10.10.2 255.255.255.0 Spoke_01(config-if)#tunnel source FastEthernet0/0 Spoke_01(config-if)#tunnel mode gre multipoint Spoke_01(config-if)# ip nhrp authentication OutBox Spoke_01(config-if)# ip nhrp network-id 100 Spoke_01(config-if)#ip nhrp map 10.10.10.1 203.81.1.2 *Apr 5 03:33:03.307: NHRP: Tunnel1: Cache add for target 10.10.10.1/32 next-hop 10.10.10.1 *Apr 5 03:33:03.311: 203.81.1.2 *Apr 5 03:33:03.331: NHRP: Inserted subblock node for cache: Target Inserted subblock node for cache: Target 10.10.10.1/32nhop 10.10.10.1 *Apr 5 03:33:03.335: NHRP: Conver