ip forwarding
interface r4-eth0
 ip address 192.168.2.4/24
!
ip route 192.168.1.0/24 192.168.2.6
interface r4-gre0
 ip address 176.16.1.4/32
 no link-detect
 ipv6 nd suppress-ra
!
interface r4-eth1
 ip address 4.4.4.4/24
!
ip route 0.0.0.0/0 176.16.1.1 50
ip route 0.0.0.0/0 176.16.1.2 60
ip route 0.0.0.0/0 176.16.1.3 70