key chain kal
　　key 1
　　key-string 234
　　!
　　interface Loopback0
　　ip address 70.70.70.70 255.255.255.255
　　!
　　interface Serial2
　　ip address 141.108.0.10 255.255.255.252
　　ip rip authentication key-chain kal
　　!
　　router rip
　　version 2
　　network 141.108.0.0
　　network 70.0.0.0key chain kal
　　key 1
　　key-string 234
　　!
　　interface Loopback0
　　ip address 80.80.80.1 255.255.255.0
　　!
　　interface Serial1/0
　　ip address 141.108.0.9 255.255.255.252
　　ip rip authentication key-chain kal
　　clockrate 64000
　　!
　　router rip
　　version 2
　　network 141.108.0.0
　　network 80.0.0.0