end R3 hostname R3 interface Ethernet0/0 ip address 192.168.4.1 255.255.255.0 half-duplex interface Serial0/0 ip address 192.168.1.1 255.255.255.0 no fair-queue end R4 hostname R4 interface Ethernet0/0 ip address 192.168.100.1 255.255.255.0 interface Serial0/0 ip address 192.168.2.1 255.255.255.0 clockrate 64000 no fair-queue interface Serial0/1 ip address 192.168.1.2 255.255.255.0 clockrate 64000 ip http server ip classless end R5 hostname R5 interface Loopback0 ip address 10.1.1.1 255.255.255.0 no ip directed-broadcast interface Ethernet0/0 ip address 172.16.1.2 255.255.255.0 no ip directed-broadcast interface Serial0/0 ip address 192.168.2.2 255.255.255.252 ip classless end Cấu hình ban đầu cho các router : R1 Router# configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router(config)#hostname R1 R1(config)#line console 0 R1(config-line)#password cisco R1(config-line)#login R1(config)#line vty 0 4 R1(config-line)#password cisco R1(config-line)#login R1(config-line)#exit R1(config)#enable password cisco R1(config)#interface s0/0 R1(config-if)#ip address 172.16.2.2 255.255.255.252 R1(config-if)#clock rate 64000 R1(config-if)#no shutdown R1(config-if)#int e0/0 R1(config-if)#ip address 172.16.1.1 255.255.255.0 R1(config-if)#no shutdown R1(config-if)#exit R1(config)# cấu hình cho router R2 : Router>enable Router#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router(config)#hostname R2 R2(config)#line console 0 R2(config-line)#password cisco R2(config-line)#line vty 0 4 R2(config-line)#no login R2(config-line)#exit R2(config)#interface e0/0 R2(config-if)#ip address 192.168.4.2 255.255.255.0 R2(config-if)#no shutdown R2(config-if)#interface s0/0 R2(config-if)#ip address 172.16.2.1 255.255.255.252 R2(config-if)#clock rate 64000 R2(config-if)#no shutdown R2(config-if)#exit R2(config)#^Z R2# cấu hình cho router R3 : Router# configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router(config)#hostname R3 R3(config)#line console 0 R3(config-line)#password cisco R3(config-line)#line vty 0 4 R3(config-line)#no login R3(config-line)#exit R3(config)#interface s0/0 R3(config-if)#ip address 192.168.1.1 255.255.255.0 R3(config-if)#clock rate 64000 R3(config-if)#no shutdown R3(config-if)#interface e0/0 R3(config-if)#ip address 192.168.4.1 255.255.255.0 R3(config-if)#no shutdown R3(config-if)#exit R3(config)#^Z R3# cấu hình cho router R4 : Router# configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router(config)#hostname R4 R4(config)#line console 0 R4(config-line)#password cisco R4(config-line)#line vty 0 4 R4(config-line)#no login R4(config-line)#exit R4(config)#interface s0/1 R4(config-if)#ip address 192.168.1.2 255.255.255.0 R4(config-if)#clock rate 64000 R4(config-if)#no shutdown R4(config-if)#interface s0/0 R4(config-if)#ip address 192.168.2.1 255.255.255.252 R4(config-if)#clock rate 64000 R4(config-if)#no shutdown R4(config-if)#exit cấu hình cho router R5 : Router# configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router(config)#hostname R5 R5(config)#line console 0 R5(config-line)#password cisco R5(config-line)#line vty 0 4 R5(config-line)#no login R5(config-line)#exit R5(config)#interface s0/0 R5(config-if)#ip address 192.168.2.2 255.255.255.252 R5(config-if)#clock rate 64000 R5(config-if)#no shutdown R5(config-if)#interface e0/0 R5(config-if)#ip address 172.16.1.2 255.255.255.0 R5(config-if)#no shutdown R5(config-if)#interface loopback 0 R5(config-if)#ip address 10.1.1.1 255.255.255.0 R5(config-if)#^Z R5# kiểm tra bảng định tuyến : R1#show ip route Gateway of last resort is not set 172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks C 172.16.1.0/24 is directly connected, Ethernet0/0 C 172.16.2.0/30 is directly connected, Serial0/0 R2#show ip route Gateway of last resort is not set 172.16.0.0/30 is subnetted, 1 subnets C 172.16.2.0 is directly connected, Serial0/0 C 192.168.4.0/24 is directly connected, Ethernet0/0 R3#show ip route Gateway of last resort is not set C 192.168.4.0/24 is directly connected, Ethernet0/0 C 192.168.1.0/24 is directly connected, Serial0/0 R4#show ip route Gateway of last resort is not set C 192.168.1.0/24 is directly connected, Serial0/1 192.168.2.0/30 is subnetted, 1 subnets C 192.168.2.0/30 is directly connected, Serial0/0 R5#show ip route Gateway of last resort is not set 172.16.0.0/24 is subnetted, 1 subnets C 172.16.1.0 is directly connected, Ethernet0/0 10.0.0.0/24 is subnetted, 1 subnets C 10.1.1.0 is directly connected, Loopback0 192.168.2.0/30 is subnetted, 1 subnets C 192.168.2.0 is directly connected, Serial0/0 Cấu hình định tuyến cho các router .Router R2,R3, interface s0/0 của R1 và interface s0/1 của R4 chạy OSPF process 1 ,còn lại là chạy ISIS . Ta biết cấu hình ISIS đòi hỏi cần phải có địa chỉ NET ,mỗi system-ID đại diện cho mỗi node, ta có thể gắn nó một cách tùy ý nhưng để đảm bảo system-ID là duy nhất của mỗi router trong một area ta sẽ sử dụng địa chỉ Mac . Ta kiểm tra địa chỉ Mac của thiết bị bằng cách show arp hoặc show interface . R1#show arp Protocol Address Age (min) Hardware Addr Type Interface Internet 172.16.1.1 - 0004.c052.7ce0 ARPA Ethernet0/0 R4#show interface e0/0 Ethernet0/0 is administratively down, line protocol is down Hardware is AmdP2, address is 0002.4b79.9ca0 (bia 0002.4b79.9ca0) Internet address is 192.168.100.1/24 MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec, reliability 252/255, txload 1/255, rxload 1/255 <omitted> R5#sh arp Protocol Address Age (min) Hardware Addr Type Interface Internet 172.16.1.2 - 00d0.ba1a.f080 ARPA Ethernet0/0 Cấu hình như sau : R1(config)#router ospf 1 R1(config-router)#network 172.16.2.0 0.0.0.3 area 0 R1(config-router)#exit R1(config)#clns routing R1(config)#router isis . R3 R3(config)#line console 0 R3(config-line)#password cisco R3(config-line)#line vty 0 4 R3(config-line)#no login R3(config-line)#exit R3(config)#interface s0/0 R3(config-if)#ip address. R2(config-line)#no login R2(config-line)#exit R2(config)#interface e0/0 R2(config-if)#ip address 192.168.4.2 255.255.255.0 R2(config-if)#no shutdown R2(config-if)#interface s0/0 R2(config-if)#ip. R4(config-line)#no login R4(config-line)#exit R4(config)#interface s0/1 R4(config-if)#ip address 192.168.1.2 255.255.255.0 R4(config-if)#clock rate 64000 R4(config-if)#no shutdown R4(config-if)#interface