214
10.0.0.0/8 172.16.0.0/16
R1 R2
r2#
router eigrp 200
network 172.16.0.0
distribute-list 1 in Serial 0
!
access-list 1 permit 172.16.0.0 0.0.255.255
S0
172.16.0.0/28
R3
r2# show ip route
.. .. ..
172.16.0.0/28 is subnetted, 3 subnets
O 172.16.0.32 [110/60] via 172.16.0.18, 00:10:35, Serial1
C 172.16.0.16 is directly connected, Serial1
C 172.16.0.0 is directly connected, Serial0
r3# show ip route
.. .. ..
172.16.0.0/28 is subnetted, 3 subnets
O 172.16.0.32 is directly connected, Serial2
C 172.16.0.16 is directly connected, Serial1
C 172.16.0.0 [110/60] via 172.16.0.18, 00:10:35, Serial1
10.0.0.0/8 is variably subnetted, 30 subnets, 2 masks
O 10.89.2.80/28 [110/101] via 172.16.0.18, 00:09:45, Serial1
O 10.89.1.80/28 [110/101] via 172.16.0.2, 00:10:35, Serial1
O 10.89.2.64/28 [110/101] via 172.16.0.18, 00:09:47, Serial1
O 10.89.1.64/28 [110/101] via 172.16.0.2, 00:10:36, Serial1
Рисунок 18.10 – Фильтрация входящих маршрутных обновлений