Re: EIGRP stbuについて

R1は[172.16.1.0]のルートを受けます。
eigrp stubはsummaryルートの他にconnectedルートもアドバタイズするので。

追記です。
提案された設定を入れた場合の各ルーティングテーブルです。参考までにどうぞ。

R1#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

10.0.0.0/24 is subnetted, 2 subnets
C 10.1.1.0 is directly connected, FastEthernet0/0
D 10.2.2.0 [90/30720] via 10.1.1.2, 00:02:56, FastEthernet0/0
172.16.0.0/24 is subnetted, 1 subnets
D 172.16.1.0 [90/33280] via 10.1.1.2, 00:02:01, FastEthernet0/0


R2#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

10.0.0.0/24 is subnetted, 2 subnets
C 10.1.1.0 is directly connected, FastEthernet0/0
C 10.2.2.0 is directly connected, FastEthernet0/1
172.16.0.0/24 is subnetted, 1 subnets
D 172.16.1.0 [90/30720] via 10.2.2.2, 00:02:43, FastEthernet0/1



R3#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

10.0.0.0/24 is subnetted, 2 subnets
D 10.1.1.0 [90/30720] via 10.2.2.1, 00:04:00, FastEthernet0/0
C 10.2.2.0 is directly connected, FastEthernet0/0
172.16.0.0/24 is subnetted, 1 subnets
C 172.16.1.0 is directly connected, FastEthernet0/1