ip forwarding
!debug nhrp all
interface nhc1-eth0
 ip address 192.168.2.4/24
!
ip route 192.168.1.0/24 192.168.2.6
interface nhc1-gre0
 ip address 172.16.1.4/32
 no link-detect
 ipv6 nd suppress-ra
 ip nhrp holdtime 10
 ip nhrp network-id 42
 ip nhrp registration no-unique
 ip nhrp nhs dynamic nbma 192.168.1.1
 ip nhrp nhs dynamic nbma 192.168.1.2
 ip nhrp nhs dynamic nbma 192.168.1.3
 ip nhrp shortcut
 tunnel source nhc1-eth0
!
interface nhc1-eth1
 ip address 10.4.4.4/24
!
ip route 0.0.0.0/0 172.16.1.1 50
ip route 0.0.0.0/0 172.16.1.2 60
ip route 0.0.0.0/0 172.16.1.3 70