OSPF 실습
OSPF 프로세스 활성화 및 Router ID 설정
R1
R1(config)#router ospf 1
R1(config-router)#router-id 1.1.1.1R2
R2(config)#router ospf 1
R2(config-router)#router-id 2.2.2.1R3
R3(config)#router ospf 1
R3(config-router)#router-id 3.3.3.1
각 인터페이스를 등록한다.
R1
R1(config-router)#network 1.1.1.1 0.0.0.0 area 0
R1(config-router)#network 192.168.12.1 0.0.0.0 area 0
R1(config-router)#network 192.168.31.1 0.0.0.0 area 0R2
R2(config-router)#network 2.2.2.1 0.0.0.0 area 0
R2(config-router)#network 192.168.12.2 0.0.0.0 area 0
R2(config-router)#network 192.168.23.2 0.0.0.0 area 0R3
R3(config-router)#network 3.3.3.1 0.0.0.0 area 0
R3(config-router)#network 192.168.31.3 0.0.0.0 area 0
R3(config-router)#network 192.168.23.3 0.0.0.0 area 0
OSPF 설정 확인
R1
R1#show ip protocol
Routing Protocol is "ospf 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Router ID 1.1.1.1
Number of areas in this router is 1. 1 normal 0 stub 0 nssa
Maximum path: 4
Routing for Networks:
1.1.1.1 0.0.0.0 area 0
192.168.12.1 0.0.0.0 area 0
192.168.31.1 0.0.0.0 area 0
Routing Information Sources:
Gateway Distance Last Update
1.1.1.1 110 00:01:32
2.2.2.1 110 00:01:32
3.3.3.1 110 00:01:32
Distance: (default is 110)R2
R2#show ip protocol
Routing Protocol is "ospf 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Router ID 2.2.2.1
Number of areas in this router is 1. 1 normal 0 stub 0 nssa
Maximum path: 4
Routing for Networks:
2.2.2.1 0.0.0.0 area 0
192.168.12.2 0.0.0.0 area 0
192.168.23.2 0.0.0.0 area 0
Routing Information Sources:
Gateway Distance Last Update
1.1.1.1 110 00:10:45
2.2.2.1 110 00:10:46
3.3.3.1 110 00:10:45
Distance: (default is 110)R3
R3#show ip protocol
Routing Protocol is "ospf 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Router ID 3.3.3.1
Number of areas in this router is 1. 1 normal 0 stub 0 nssa
Maximum path: 4
Routing for Networks:
3.3.3.1 0.0.0.0 area 0
192.168.31.3 0.0.0.0 area 0
192.168.23.3 0.0.0.0 area 0
Routing Information Sources:
Gateway Distance Last Update
1.1.1.1 110 00:12:33
2.2.2.1 110 00:12:33
3.3.3.1 110 00:12:33
Distance: (default is 110)
neighbor 컴퓨터 확인
R1
R1#show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
2.2.2.1 0 FULL/ - 00:00:38 192.168.12.2 Serial0/0/0
3.3.3.1 0 FULL/ - 00:00:34 192.168.31.3 Serial0/0/1R1#show ip ospf int s0/0/0
Serial0/0/0 is up, line protocol is up
Internet address is 192.168.12.1/24, Area 0
Process ID 1, Router ID 1.1.1.1, Network Type POINT-TO-POINT, Cost: 64
Transmit Delay is 1 sec, State POINT-TO-POINT,
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:05
Index 2/2, flood queue length 0
Next 0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 1
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 1 , Adjacent neighbor count is 1
Adjacent with neighbor 2.2.2.1
Suppress hello for 0 neighbor(s)R2
R2#show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
3.3.3.1 0 FULL/ - 00:00:33 192.168.23.3 Serial0/0/0
1.1.1.1 0 FULL/ - 00:00:32 192.168.12.1 Serial0/0/1R2#show ip ospf int s0/0/0
Serial0/0/0 is up, line protocol is up
Internet address is 192.168.23.2/24, Area 0
Process ID 1, Router ID 2.2.2.1, Network Type POINT-TO-POINT, Cost: 64
Transmit Delay is 1 sec, State POINT-TO-POINT,
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:02
Index 3/3, flood queue length 0
Next 0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 1
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 1 , Adjacent neighbor count is 1
Adjacent with neighbor 3.3.3.1
Suppress hello for 0 neighbor(s)R3
R3#show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
2.2.2.1 0 FULL/ - 00:00:30 192.168.23.2 Serial0/0/1
1.1.1.1 0 FULL/ - 00:00:30 192.168.31.1 Serial0/0/0R3#show ip ospf int s0/0/0
Serial0/0/0 is up, line protocol is up
Internet address is 192.168.31.3/24, Area 0
Process ID 1, Router ID 3.3.3.1, Network Type POINT-TO-POINT, Cost: 64
Transmit Delay is 1 sec, State POINT-TO-POINT,
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:08
Index 2/2, flood queue length 0
Next 0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 1
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 1 , Adjacent neighbor count is 1
Adjacent with neighbor 1.1.1.1
Suppress hello for 0 neighbor(s)
OSPF에 의해 라우팅 정보 받아왔는지 확인
R1
R1#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, 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
1.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 1.1.1.0/24 is directly connected, GigabitEthernet0/0
L 1.1.1.1/32 is directly connected, GigabitEthernet0/0
2.0.0.0/24 is subnetted, 1 subnets
O 2.2.2.0/24 [110/65] via 192.168.12.2, 00:03:05, Serial0/0/0
3.0.0.0/24 is subnetted, 1 subnets
O 3.3.3.0/24 [110/65] via 192.168.31.3, 00:02:25, Serial0/0/1
192.168.12.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.12.0/24 is directly connected, Serial0/0/0
L 192.168.12.1/32 is directly connected, Serial0/0/0
O 192.168.23.0/24 [110/128] via 192.168.12.2, 00:02:25, Serial0/0/0
[110/128] via 192.168.31.3, 00:02:25, Serial0/0/1
192.168.31.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.31.0/24 is directly connected, Serial0/0/1
L 192.168.31.1/32 is directly connected, Serial0/0/1R2
R2#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, 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
1.0.0.0/24 is subnetted, 1 subnets
O 1.1.1.0/24 [110/65] via 192.168.12.1, 00:11:16, Serial0/0/1
2.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 2.2.2.0/24 is directly connected, GigabitEthernet0/0
L 2.2.2.1/32 is directly connected, GigabitEthernet0/0
3.0.0.0/24 is subnetted, 1 subnets
O 3.3.3.0/24 [110/65] via 192.168.23.3, 00:10:56, Serial0/0/0
192.168.12.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.12.0/24 is directly connected, Serial0/0/1
L 192.168.12.2/32 is directly connected, Serial0/0/1
192.168.23.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.23.0/24 is directly connected, Serial0/0/0
L 192.168.23.2/32 is directly connected, Serial0/0/0
O 192.168.31.0/24 [110/128] via 192.168.12.1, 00:10:56, Serial0/0/1
[110/128] via 192.168.23.3, 00:10:56, Serial0/0/0R3
R3#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, 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
1.0.0.0/24 is subnetted, 1 subnets
O 1.1.1.0/24 [110/65] via 192.168.31.1, 00:12:42, Serial0/0/0
2.0.0.0/24 is subnetted, 1 subnets
O 2.2.2.0/24 [110/65] via 192.168.23.2, 00:12:42, Serial0/0/1
3.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 3.3.3.0/24 is directly connected, GigabitEthernet0/0
L 3.3.3.1/32 is directly connected, GigabitEthernet0/0
O 192.168.12.0/24 [110/128] via 192.168.31.1, 00:12:42, Serial0/0/0
[110/128] via 192.168.23.2, 00:12:42, Serial0/0/1
192.168.23.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.23.0/24 is directly connected, Serial0/0/1
L 192.168.23.3/32 is directly connected, Serial0/0/1
192.168.31.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.31.0/24 is directly connected, Serial0/0/0
L 192.168.31.3/32 is directly connected, Serial0/0/0
PC에서 TEST
PC1
C:\>ping 2.2.2.11
Pinging 2.2.2.11 with 32 bytes of data:
Request timed out.
Reply from 2.2.2.11: bytes=32 time=5ms TTL=126
Reply from 2.2.2.11: bytes=32 time=3ms TTL=126
Reply from 2.2.2.11: bytes=32 time=7ms TTL=126
Ping statistics for 2.2.2.11:
Packets: Sent = 4, Received = 3, Lost = 1 (25% loss),
Approximate round trip times in milli-seconds:
Minimum = 3ms, Maximum = 7ms, Average = 5ms
C:\>ping 3.3.3.11
Pinging 3.3.3.11 with 32 bytes of data:
Request timed out.
Reply from 3.3.3.11: bytes=32 time=5ms TTL=126
Reply from 3.3.3.11: bytes=32 time=6ms TTL=126
Reply from 3.3.3.11: bytes=32 time=6ms TTL=126
Ping statistics for 3.3.3.11:
Packets: Sent = 4, Received = 3, Lost = 1 (25% loss),
Approximate round trip times in milli-seconds:
Minimum = 5ms, Maximum = 6ms, Average = 5msPC2
C:\>ping 1.1.1.11
Pinging 1.1.1.11 with 32 bytes of data:
Reply from 1.1.1.11: bytes=32 time=2ms TTL=126
Reply from 1.1.1.11: bytes=32 time=6ms TTL=126
Reply from 1.1.1.11: bytes=32 time=5ms TTL=126
Reply from 1.1.1.11: bytes=32 time=5ms TTL=126
Ping statistics for 1.1.1.11:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 2ms, Maximum = 6ms, Average = 4ms
C:\>ping 3.3.3.11
Pinging 3.3.3.11 with 32 bytes of data:
Reply from 3.3.3.11: bytes=32 time=6ms TTL=126
Reply from 3.3.3.11: bytes=32 time=5ms TTL=126
Reply from 3.3.3.11: bytes=32 time=5ms TTL=126
Reply from 3.3.3.11: bytes=32 time=6ms TTL=126
Ping statistics for 3.3.3.11:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 5ms, Maximum = 6ms, Average = 5msPC3
C:\>ping 1.1.1.11
Pinging 1.1.1.11 with 32 bytes of data:
Reply from 1.1.1.11: bytes=32 time=6ms TTL=126
Reply from 1.1.1.11: bytes=32 time=2ms TTL=126
Reply from 1.1.1.11: bytes=32 time=6ms TTL=126
Reply from 1.1.1.11: bytes=32 time=7ms TTL=126
Ping statistics for 1.1.1.11:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 2ms, Maximum = 7ms, Average = 5ms
C:\>ping 2.2.2.11
Pinging 2.2.2.11 with 32 bytes of data:
Reply from 2.2.2.11: bytes=32 time=6ms TTL=126
Reply from 2.2.2.11: bytes=32 time=6ms TTL=126
Reply from 2.2.2.11: bytes=32 time=6ms TTL=126
Reply from 2.2.2.11: bytes=32 time=7ms TTL=126
Ping statistics for 2.2.2.11:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 6ms, Maximum = 7ms, Average = 6ms아래와 같이 라우터 연결을 하나 끊어도 통신이 잘 되는 것을 확인할 수 있다.
PC2
C:\>ping 1.1.1.11
Pinging 1.1.1.11 with 32 bytes of data:
Reply from 1.1.1.11: bytes=32 time=7ms TTL=126
Reply from 1.1.1.11: bytes=32 time=6ms TTL=126
Reply from 1.1.1.11: bytes=32 time=5ms TTL=126
Reply from 1.1.1.11: bytes=32 time=6ms TTL=126
Ping statistics for 1.1.1.11:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 5ms, Maximum = 7ms, Average = 6ms
C:\>ping 3.3.3.11
Pinging 3.3.3.11 with 32 bytes of data:
Reply from 3.3.3.11: bytes=32 time=10ms TTL=125
Reply from 3.3.3.11: bytes=32 time=8ms TTL=125
Reply from 3.3.3.11: bytes=32 time=8ms TTL=125
Reply from 3.3.3.11: bytes=32 time=7ms TTL=125
Ping statistics for 3.3.3.11:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 7ms, Maximum = 10ms, Average = 8ms
R2의 라우팅 정보는 변경되지 않는다.
R2#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, 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
1.0.0.0/24 is subnetted, 1 subnets
O 1.1.1.0/24 [110/65] via 192.168.12.1, 00:20:03, Serial0/0/1
2.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 2.2.2.0/24 is directly connected, GigabitEthernet0/0
L 2.2.2.1/32 is directly connected, GigabitEthernet0/0
3.0.0.0/24 is subnetted, 1 subnets
O 3.3.3.0/24 [110/129] via 192.168.12.1, 00:03:18, Serial0/0/1
192.168.12.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.12.0/24 is directly connected, Serial0/0/1
L 192.168.12.2/32 is directly connected, Serial0/0/1
O 192.168.31.0/24 [110/128] via 192.168.12.1, 00:03:18, Serial0/0/1OSPF DR, BDR 실습
OSPF 인터페이스 설정
R1
R1(config)#router ospf 1
R1(config-router)#router-id 1.1.1.1
R1(config-router)#network 1.1.1.1 0.0.0.0 area 0
R1(config-router)#network 5.5.5.1 0.0.0.0 area 0R2
R2(config)#router ospf 1
R2(config-router)#router-id 2.2.2.1
R2(config-router)#network 2.2.2.1 0.0.0.0 area 0
R2(config-router)#network 5.5.5.2 0.0.0.0 area 0R3
R3(config)#router ospf 1
R3(config-router)#router-id 3.3.3.1
R3(config-router)#network 3.3.3.1 0.0.0.0 area 0
R3(config-router)#network 5.5.5.3 0.0.0.0 area 0R4
R4(config)#router ospf 1
R4(config-router)#router-id 4.4.4.1
R4(config-router)#network 4.4.4.1 0.0.0.0 area 0
R4(config-router)#network 5.5.5.4 0.0.0.0 area 0
DR, BDR 확인
라우터를 킨 순서로 DR, BDR이 선정된다.
DR, BDR이 선정되면 다시 선정하는 작업은 하지 않는다.
R4#show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
1.1.1.1 1 FULL/DR 00:00:39 5.5.5.1 GigabitEthernet0/1
3.3.3.1 1 2WAY/DROTHER 00:00:30 5.5.5.3 GigabitEthernet0/1
2.2.2.1 1 FULL/BDR 00:00:33 5.5.5.2 GigabitEthernet0/1
DR로 선정된 R1을 끄면 DR이 변경되는 것을 확인할 수 있다.
R3#show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
2.2.2.1 1 FULL/DR 00:00:37 5.5.5.2 GigabitEthernet0/1
4.4.4.1 1 FULL/BDR 00:00:37 5.5.5.4 GigabitEthernet0/1
1.1.1.1 1 2WAY/DROTHER 00:00:37 5.5.5.1 GigabitEthernet0/1
PC TEST
PC1
C:\>ping 3.3.3.11
Pinging 3.3.3.11 with 32 bytes of data:
Request timed out.
Reply from 3.3.3.11: bytes=32 time<1ms TTL=126
Reply from 3.3.3.11: bytes=32 time<1ms TTL=126
Reply from 3.3.3.11: bytes=32 time<1ms TTL=126
Ping statistics for 3.3.3.11:
Packets: Sent = 4, Received = 3, Lost = 1 (25% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0msMulti area OSPF
Router 설정
R0_1
R0_1(config)#router ospf 1
R0_1(config-router)#router-id 192.168.0.1
R0_1(config-router)#network 192.168.0.1 0.0.0.0 area 0
R0_1(config-router)#network 192.168.1.1 0.0.0.0 area 1R0_2
R0_2(config)#router ospf 1
R0_2(config-router)#router-id 192.168.0.2
R0_2(config-router)#network 192.168.0.2 0.0.0.0 area 0
R0_2(config-router)#network 192.168.2.1 0.0.0.0 area 2R1
R1(config)#router ospf 1
R1(config-router)#router-id 192.168.10.1
R1(config-router)#network 192.168.10.1 0.0.0.0 area 1
R1(config-router)#network 192.168.1.2 0.0.0.0 area 1R2
R2(config)#router ospf 1
R2(config-router)#router-id 192.168.20.1
R2(config-router)#network 192.168.20.1 0.0.0.0 area 2
R2(config-router)#network 192.168.2.2 0.0.0.0 area 2
PC1에서 TEST
C:\>ping 192.168.20.3
Pinging 192.168.20.3 with 32 bytes of data:
Request timed out.
Reply from 192.168.20.3: bytes=32 time=59ms TTL=124
Reply from 192.168.20.3: bytes=32 time=11ms TTL=124
Reply from 192.168.20.3: bytes=32 time=10ms TTL=124
Ping statistics for 192.168.20.3:
Packets: Sent = 4, Received = 3, Lost = 1 (25% loss),
Approximate round trip times in milli-seconds:
Minimum = 10ms, Maximum = 59ms, Average = 26ms'네트워크 공부 기록' 카테고리의 다른 글
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