目標：要設定左右兩台Router的介面卡，並且安裝WIC-1T，並設定好Serial Interface
先把左右兩台Router關機，將WIC-1T模組安裝到Router上，在將Router開機
進入到全域配置模式
Router>enable Router#configure terminal
先設定左邊這台Router，第一張介面卡設定為 192.168.1.254/24，ON起來
Router(config)#interface fa0/0 Router(config-if)#ip address 192.168.1.254 255.255.255.0 Router(config-if)#no shutdown %LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up Router(config-if)#exit
接著設定第二張介面卡，IP設定為192.168.2.254/24，ON起來
Router(config)#interface fa0/1 Router(config-if)#ip address 192.168.2.254 255.255.255.0 Router(config-if)#no shutdown %LINK-5-CHANGED: Interface FastEthernet0/1, changed state to up %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up Router(config-if)#exit
再來設定Serial的介面卡，Serial IP設定為210.10.10.1/24，將介面卡ON起來，Clock rate設定為64000
Router(config)#interface serial 0/3/0 Router(config-if)#ip address 210.10.10.1 255.255.255.0 Router(config-if)#no shutdown %LINK-5-CHANGED: Interface Serial0/3/0, changed state to down Router(config-if)#clock rate 64000 Router(config-if)#exit
將左邊Router配置檔儲存起來
Router(config)#exit Router# %SYS-5-CONFIG_I: Configured from console by console Router#copy running-config startup-config Destination filename [startup-config]? Building configuration... [OK] Router#
再來設定右邊這台Router，第一張介面卡設定為192.168.3.254/24，也要ON起來
Router(config)#interface fa0/0 Router(config-if)#ip address 192.168.3.254 255.255.255.0 Router(config-if)#no shutdown %LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up Router(config-if)#exit
第二張介面卡設定為192.168.4.254/24，也ON起來
Router(config)#interface fa0/1 Router(config-if)#ip address 192.168.4.254 255.255.255.0 Router(config-if)#no shutdown %LINK-5-CHANGED: Interface FastEthernet0/1, changed state to up %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up Router(config-if)#exit
Serial IP設定為210.10.10.2/24
Router(config)#interface serial 0/3/0 Router(config-if)#ip address 210.10.10.2 255.255.255.0 Router(config-if)#no shutdown %LINK-5-CHANGED: Interface Serial0/3/0, changed state to up Router(config-if)#exit
接著將右邊Router配置檔儲存起來
Router#copy running-config startup-config Destination filename [startup-config]? Building configuration... [OK] Router#
再來設定每台Host的IP，依照該網段去分配，在此以最左邊電腦當作範例
點擊Host，選擇到Desktop/Configure IP Settings
初始IP設定為192.168.1.1，那Mask設定為255.255.255.0，Gateway就設定為Router介面的位置，192.168.1.254
現在可以達成192.168.1.1與192.168.2.1互相連結
但是沒辦法連結到192.168.3.1與192.168.4.1
反之192.168.3.1與192.168.4.1可以相互連結
但也沒辦法連結到192.168.1.1與192.168.2.1
還沒設定前Router Table，基本上只有192.168.1.0/24、192.168.2.0/24以及210.10.10.0/24的通道
Router#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
C 192.168.1.0/24 is directly connected, FastEthernet0/0
C 192.168.2.0/24 is directly connected, FastEthernet0/1
C 210.10.10.0/24 is directly connected, Serial0/3/0
讓左邊這台Router可以連接到192.168.3.0以及192.168.4.0的IP，並透過serial 0/3/0去連通吧！
Router#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router(config)#ip route 192.168.3.0 255.255.255.0 serial 0/3/0 Router(config)#ip route 192.168.4.0 255.255.255.0 serial 0/3/0 Router(config)#exit
再回來看看新的Router Table
Router#
%SYS-5-CONFIG_I: Configured from console by console
Router#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
C 192.168.1.0/24 is directly connected, FastEthernet0/0
C 192.168.2.0/24 is directly connected, FastEthernet0/1
S 192.168.3.0/24 is directly connected, Serial0/3/0
S 192.168.4.0/24 is directly connected, Serial0/3/0
C 210.10.10.0/24 is directly connected, Serial0/3/0
Router#
先觀察左邊這台Router設定前的Router Table
Router>enable
Router#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
C 192.168.3.0/24 is directly connected, FastEthernet0/0
C 192.168.4.0/24 is directly connected, FastEthernet0/1
C 210.10.10.0/24 is directly connected, Serial0/3/0
讓右邊這台Router可以連接到192.168.1.0以及192.168.2.0的IP，並透過serial 0/3/0去連通吧！
Router#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router(config)#ip route 192.168.1.0 255.255.255.0 serial 0/3/0 Router(config)#ip route 192.168.2.0 255.255.255.0 serial 0/3/0 Router(config)#exit
再來觀察新增後的Router Table
Router#
%SYS-5-CONFIG_I: Configured from console by console
Router#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
S 192.168.1.0/24 is directly connected, Serial0/3/0
S 192.168.2.0/24 is directly connected, Serial0/3/0
C 192.168.3.0/24 is directly connected, FastEthernet0/0
C 192.168.4.0/24 is directly connected, FastEthernet0/1
C 210.10.10.0/24 is directly connected, Serial0/3/0
Router#
新增完Router Table就可以互相連結了
順道一提如果新增route table的出口是以介面卡當作出口，那優先權會比較重
例如： ip route 192.168.1.0 255.255.255.0 fa0/0 > ip route 192.168.1.0 255.255.255.0 210.10.10.2
