VLSM：Variable Length Subnet Mask
AD：Administration Distance
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enconf thostname [路由器名稱]enable password [密碼]int e0/0ip addr [IP] [遮罩]no shutexitint e0/1ip addr [IP] [遮罩]no shutexitint lo 0ip addr [IP] [遮罩]no shutexitdo writdo sh ip int briefdo sh ip rorouter ripver 2no auto-summarynetwork 12.1.1.0network 13.1.1.0network 1.1.1.0network 12.1.1.0network 23.1.1.0network 2.2.2.0network 13.1.1.0network 23.1.1.0network 3.3.3.0exitdo show runexitsh ip route ripping 1.1.1.1 source 2.2.2.2ping 1.1.1.1 repeat 10 source 2.2.2.2ping 1.1.1.1 repeat 10 source 23.1.1.2int lo 1ip addr 172.16.0.1 255.255.255.0no shutint lo 2ip addr 172.16.1.1 255.255.255.0no shutint lo 3ip addr 172.16.2.1 255.255.255.0no shutint lo 4ip addr 172.16.3.1 255.255.255.0no shutdo sh ip int briefrouter ripnetwork 172.16.0.0do sh run^Zsh ip routeint e0/1ip summary-address rip 172.16.0.0 255.255.252.0clear ip route *sh ip ro ripclear ip route *sh ip ro ripenconf thostname R1do writint e0/0ip addr 192.168.12.1 255.255.255.0no shutexitrouter ripversion 2no auto-summarynetwork 192.168.12.0exitenconf thostname R2do writint e0/0ip addr 192.168.12.2 255.255.255.0no shutexitint e0/1ip addr 192.168.23.2 255.255.255.0no shutexitrouter ripversion 2no auto-summarynetwork 192.168.12.0network 192.168.23.0exitenconf thostname R3do writint e0/0ip addr 192.168.23.3 255.255.255.0no shutexitrouter ripversion 2no auto-summarynetwork 192.168.23.0exitrouter ripver 2passive-interfacepassive-interface defaulton passive-interface e0/0network 10.0.0.0router ripdefault-information originatesh ip ro ripsh ip ro rip