IP address の設定（回答）

回答

RT1>enable
RT1#conf t
RT1(config)#interface ethernet0/0
RT1(config-if)#ip address 10.1.1.1 255.255.255.0
RT1(config-if)#no shutdown

RT2>enable
RT2#conf t
RT2(config)#interface ethernet0/0
RT2(config-if)#ip address 10.1.1.2 255.255.255.0
RT2(config-if)#no shutdown

　

　

解説

IOS-XE では interface mode にて以下構文で IP address を設定できます。

(config-if)#ip address [アドレス] [サブネットマスク]

　

この問題では構成図に従い
RT1 には 10.1.1.1/24
RT2 には 10.1.1.2/24 

を設定しますが、RT1, 2 の初期状態は interface が administratively down (shutdown) となっています。

RT1#show ip interface brief
Interface              IP-Address      OK? Method Status                Protocol
Ethernet0/0            unassigned      YES TFTP   administratively down down
Ethernet0/1            unassigned      YES TFTP   administratively down down
Ethernet0/2            unassigned      YES TFTP   administratively down down
Ethernet0/3            unassigned      YES TFTP   administratively down down

RT2#show ip interface brief
Interface              IP-Address      OK? Method Status                Protocol
Ethernet0/0            unassigned      YES TFTP   administratively down down
Ethernet0/1            unassigned      YES TFTP   administratively down down
Ethernet0/2            unassigned      YES TFTP   administratively down down
Ethernet0/3            unassigned      YES TFTP   administratively down down

　

また、初期状態では上記のように何の IP address も設定されていないため、Routng table も空となっています。

RT1#show ip route
Codes: L - local, C - connected, S - static, 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, m - OMP
       n - NAT, Ni - NAT inside, No - NAT outside, Nd - NAT DIA
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       H - NHRP, G - NHRP registered, g - NHRP registration summary
       o - ODR, P - periodic downloaded static route, l - LISP
       a - application route
       + - replicated route, % - next hop override, p - overrides from PfR
       & - replicated local route overrides by connected

Gateway of last resort is not set

RT2#show ip route
Codes: L - local, C - connected, S - static, 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, m - OMP
       n - NAT, Ni - NAT inside, No - NAT outside, Nd - NAT DIA
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       H - NHRP, G - NHRP registered, g - NHRP registration summary
       o - ODR, P - periodic downloaded static route, l - LISP
       a - application route
       + - replicated route, % - next hop override, p - overrides from PfR
       & - replicated local route overrides by connected

Gateway of last resort is not set

　

回答通りに ip address と no shutdown を設定すると、show ip interface brief の出力が以下のよう変化します。

RT1#show ip interface brief
Interface              IP-Address      OK? Method Status                Protocol
Ethernet0/0            10.1.1.1        YES manual up                    up
Ethernet0/1            unassigned      YES TFTP   administratively down down
Ethernet0/2            unassigned      YES TFTP   administratively down down
Ethernet0/3            unassigned      YES TFTP   administratively down down

RT2#show ip interface brief
Interface              IP-Address      OK? Method Status                Protocol
Ethernet0/0            10.1.1.2        YES manual up                    up
Ethernet0/1            unassigned      YES TFTP   administratively down down
Ethernet0/2            unassigned      YES TFTP   administratively down down
Ethernet0/3            unassigned      YES TFTP   administratively down down

　

そして、IP address が設定されると Routing table に経路情報（ネットワーク情報）が追加されます。

RT1#show ip route
Codes: L - local, C - connected, S - static, 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, m - OMP
       n - NAT, Ni - NAT inside, No - NAT outside, Nd - NAT DIA
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       H - NHRP, G - NHRP registered, g - NHRP registration summary
       o - ODR, P - periodic downloaded static route, l - LISP
       a - application route
       + - replicated route, % - next hop override, p - overrides from PfR
       & - replicated local route overrides by connected

Gateway of last resort is not set

      10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C        10.1.1.0/24 is directly connected, Ethernet0/0
L        10.1.1.1/32 is directly connected, Ethernet0/0

RT2#show ip route
Codes: L - local, C - connected, S - static, 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, m - OMP
       n - NAT, Ni - NAT inside, No - NAT outside, Nd - NAT DIA
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       H - NHRP, G - NHRP registered, g - NHRP registration summary
       o - ODR, P - periodic downloaded static route, l - LISP
       a - application route
       + - replicated route, % - next hop override, p - overrides from PfR
       & - replicated local route overrides by connected

Gateway of last resort is not set

      10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C        10.1.1.0/24 is directly connected, Ethernet0/0
L        10.1.1.2/32 is directly connected, Ethernet0/0

最後に ping を実行し疎通性があることを確認します。"!"が表示され、問題なく通信できたことが確認できました。

RT1#ping 10.1.1.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.1.2, timeout is 2 seconds:
.!!!!
Success rate is 80 percent (4/5), round-trip min/avg/max = 1/1/1 ms

RT2#ping 10.1.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms

※RT1 側からの ping は初めての通信であったため、ARP 解決が行われたことで1つ失敗しています。