R5#sh ip route 1.0.0.0/24 is subnetted, 1 subnets i L2 1.1.1.0 [115/40] via 192.168.45.4, 00:00:28, Ethernet0/0 2.0.0.0/24 is subnetted, 1 subnets i L2 2.2.2.0 [115/30] via 192.168.45.4, 00:00:28, Ethernet0/0 3.0.0.0/24 is subnetted, 1 subnets i L2 3.3.3.0 [115/30] via 192.168.45.4, 00:00:28, Ethernet0/0 4.0.0.0/24 is subnetted, 1 subnets i L2 4.4.4.0 [115/20] via 192.168.45.4, 00:00:28, Ethernet0/0 5.0.0.0/8 is variably subnetted, 2 subnets, 2 masks C 5.5.5.0/24 is directly connected, Loopback0 L 5.5.5.5/32 is directly connected, Loopback0 i L2 192.168.24.0/24 [115/20] via 192.168.45.4, 00:00:28, Ethernet0/0 i L2 192.168.34.0/24 [115/20] via 192.168.45.4, 00:00:28, Ethernet0/0 192.168.45.0/24 is variably subnetted, 2 subnets, 2 masks C 192.168.45.0/24 is directly connected, Ethernet0/0 L 192.168.45.5/32 is directly connected, Ethernet0/0 i L2 192.168.123.0/24 [115/30] via 192.168.45.4, 00:00:28, Ethernet0/0 R5#ping 1.1.1.1 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms
System Id Type Interface IP Address State Holdtime Circuit Id R1 L1 Et0/0 192.168.123.1 UP 21 R3.01 R1 L2 Et0/0 192.168.123.1 UP 26 R3.01 R3 L1 Et0/0 192.168.123.3 UP 7 R3.01 R3 L2 Et0/0 192.168.123.3 UP 9 R3.01 R4 L2 Et0/1 192.168.24.4 UP 9 R4.01
R2#show clns neighbors System Id Interface SNPA State Holdtime Type Protocol R1 Et0/0 aabb.cc00.1000 Up 23 L1 IS-IS R3 Et0/0 aabb.cc00.3000 Up 8 L1 IS-IS R4 Et0/1 aabb.cc00.4000 Up 9 L2 IS-IS
R5#sh ip route isis 1.0.0.0/24 is subnetted, 1 subnets i L2 1.1.1.0 [115/40] via 192.168.45.4, 00:00:28, Ethernet0/0 2.0.0.0/24 is subnetted, 1 subnets i L2 2.2.2.0 [115/30] via 192.168.45.4, 00:10:28, Ethernet0/0 3.0.0.0/24 is subnetted, 1 subnets i L2 3.3.3.0 [115/30] via 192.168.45.4, 00:00:28, Ethernet0/0 4.0.0.0/24 is subnetted, 1 subnets i L2 4.4.4.0 [115/20] via 192.168.45.4, 00:54:30, Ethernet0/0 i L2 192.168.24.0/24 [115/20] via 192.168.45.4, 00:54:30, Ethernet0/0 i L2 192.168.34.0/24 [115/20] via 192.168.45.4, 00:54:30, Ethernet0/0 i L2 192.168.123.0/24 [115/30] via 192.168.45.4, 00:00:28, Ethernet0/0
R1#sh ip route isis 2.0.0.0/24 is subnetted, 1 subnets i L1 2.2.2.0 [115/20] via 192.168.123.2, 00:00:03, Ethernet0/0 3.0.0.0/24 is subnetted, 1 subnets i L1 3.3.3.0 [115/20] via 192.168.123.3, 00:00:03, Ethernet0/0 4.0.0.0/24 is subnetted, 1 subnets i L2 4.4.4.0 [115/30] via 192.168.123.3, 00:19:03, Ethernet0/0 [115/30] via 192.168.123.2, 00:19:03, Ethernet0/0 5.0.0.0/24 is subnetted, 1 subnets i L2 5.5.5.0 [115/40] via 192.168.123.3, 00:19:03, Ethernet0/0 [115/40] via 192.168.123.2, 00:19:03, Ethernet0/0 i L1 192.168.24.0/24 [115/20] via 192.168.123.2, 00:00:03, Ethernet0/0 i L1 192.168.34.0/24 [115/20] via 192.168.123.3, 00:00:03, Ethernet0/0 i L2 192.168.45.0/24 [115/30] via 192.168.123.3, 00:19:03, Ethernet0/0 [115/30] via 192.168.123.2, 00:19:03, Ethernet0/0
System Id Type Interface IP Address State Holdtime Circuit Id R2 L1 Et0/0 192.168.123.2 UP 22 R3.01 R3 L1 Et0/0 192.168.123.3 UP 7 R3.01
检查R1的路由表
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R1#show ip route isis i*L1 0.0.0.0/0 [115/10] via 192.168.123.3, 00:00:36, Ethernet0/0 [115/10] via 192.168.123.2, 00:00:36, Ethernet0/0 2.0.0.0/24 is subnetted, 1 subnets i L1 2.2.2.0 [115/20] via 192.168.123.2, 00:00:36, Ethernet0/0 3.0.0.0/24 is subnetted, 1 subnets i L1 3.3.3.0 [115/20] via 192.168.123.3, 00:00:36, Ethernet0/0 i L1 192.168.24.0/24 [115/20] via 192.168.123.2, 00:00:36, Ethernet0/0 i L1 192.168.34.0/24 [115/20] via 192.168.123.3, 00:00:36, Ethernet0/0
我们查看R2的ISIS邻居表
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R2#show isis neighbors
System Id Type Interface IP Address State Holdtime Circuit Id R1 L1 Et0/0 192.168.123.1 UP 25 R3.01 R3 L1 Et0/0 192.168.123.3 UP 8 R3.01 R3 L2 Et0/0 192.168.123.3 UP 7 R3.01 R4 L2 Et0/1 192.168.24.4 UP 8 R4.01
System Id Type Interface IP Address State Holdtime Circuit Id R1 L1 Et0/0 192.168.123.1 UP 25 R3.01 R3 L1 Et0/0 192.168.123.3 UP 6 R3.01 R4 L2 Et0/1 192.168.24.4 UP 9 R4.01