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! interface r1-eth0 ip address 192.168.2.1/24 ! interface r1-eth1 ip address 192.168.3.1/24 ! interface r1-eth2 ip address 192.168.4.1/24 ! interface r1-eth3 ip address 192.168.5.1/24 ! interface r1-eth4 ip address 192.168.6.1/24 ! ip forwarding !