EdgeRouter - OSPF 네트워킹 설정하기¶
download at 2017-02-07T01:06:52Z origin
Overview¶
이 문서는 3개의 라우터를 조합하여 OSPF 네트워크를 설정하는 방법에 대하여 서술합니다.
3개 라우터로 구성한 OSPF 네트워크 다이어그램
Note
configure 명령어를 각 라우터 설정 이전에 수행해야 한다는 것을 잊지마세요.
R1 환경 설정
- IP 주소를 설정합니다.
ubnt@R1#set interfaces ethernet eth1 address 10.0.50.1/24
- OSPF를 설정합니다.
ubnt@R1#set protocols ospf parameters router-id 10.0.50.1
ubnt@R1#set protocols ospf area 0.0.0.0 network 10.0.50.0/24
ubnt@R1#set interfaces ethernet eth1 ip ospf cost 10
ubnt@R1#set interfaces ethernet eth1 ip ospf dead-interval 40
ubnt@R1#set interfaces ethernet eth1 ip ospf hello-interval 10
ubnt@R1#set interfaces ethernet eth1 ip ospf priority 1
ubnt@R1#set interfaces ethernet eth1 ip ospf retransmit-interval 5
ubnt@R1#set interfaces ethernet eth1 ip ospf transmit-delay 1
R2 환경 설정
- IP 주소를 설정합니다.
ubnt@R2#set interfaces ethernet eth1 address 10.0.50.2/24
ubnt@R2#set interfaces ethernet eth2 address 10.0.60.2/24
- OSPF를 설정합니다.
ubnt@R2#set protocols ospf parameters router-id 10.0.50.2
ubnt@R2#set protocols ospf area 0.0.0.0 network 10.0.50.0/24
ubnt@R2#set protocols ospf area 0.0.0.0 network 10.0.60.0/24
ubnt@R2#set interfaces ethernet eth1 ip ospf cost 10
ubnt@R2#set interfaces ethernet eth1 ip ospf dead-interval 40
ubnt@R2#set interfaces ethernet eth1 ip ospf hello-interval 10
ubnt@R2#set interfaces ethernet eth1 ip ospf priority 1
ubnt@R2#set interfaces ethernet eth1 ip ospf retransmit-interval 5
ubnt@R2#set interfaces ethernet eth1 ip ospf transmit-delay 1
ubnt@R2#set interfaces ethernet eth2 ip ospf cost 10
ubnt@R2#set interfaces ethernet eth2 ip ospf dead-interval 40
ubnt@R2#set interfaces ethernet eth2 ip ospf hello-interval 10
ubnt@R2#set interfaces ethernet eth2 ip ospf priority 1
ubnt@R2#set interfaces ethernet eth2 ip ospf retransmit-interval 5
ubnt@R2#set interfaces ethernet eth2 ip ospf transmit-delay 1
R3 환경 설정
- IP 주소를 설정합니다.
ubnt@R3#set interfaces ethernet eth0 address 10.0.60.3/24
- OSPF를 설정합니다.
ubnt@R3#set protocols ospf parameters router-id 10.0.60.3
ubnt@R3#set protocols ospf area 0.0.0.0 network 10.0.60.0/24
ubnt@R3#set interfaces ethernet eth0 ip ospf cost 10
ubnt@R3#set interfaces ethernet eth0 ip ospf dead-interval 40
ubnt@R3#set interfaces ethernet eth0 ip ospf hello-interval 10
ubnt@R3#set interfaces ethernet eth0 ip ospf priority 1
ubnt@R3#set interfaces ethernet eth0 ip ospf retransmit-interval 5
ubnt@R3#set interfaces ethernet eth0 ip ospf transmit-delay 1
설정이 완료된 이후에는 R1은 10.0.50.2에서 10.0.60.0/24에 접근이 가능합니다:
ubnt@R1:~$ show ip route
Codes: K - kernel route, C - connected, S - static, R - RIP, O - OSPF,
I - ISIS, B - BGP, > - selected route, * - FIB route
S>* 0.0.0.0/0 [210/0] via 192.168.0.1, eth5
O 10.0.50.0/24 [110/10] is directly connected, eth1, 00:00:27
C>* 10.0.50.0/24 is directly connected, eth1
O>* 10.0.60.0/24 [110/20] via 10.0.50.2, eth1, 00:00:11
C>* 127.0.0.0/8 is directly connected, lo
C>* 172.16.3.0/24 is directly connected, eth2
ubnt@R1:~$ ping 10.0.60.3
PING 10.0.60.3 (10.0.60.3) 56(84) bytes of data.
64 bytes from 10.0.60.3: icmp_req=1 ttl=63 time=18.1 ms
^C
--- 10.0.60.3 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 18.175/18.175/18.175/0.000 ms
ubnt@R1:~$ traceroute 10.0.60.3
traceroute to 10.0.60.3 (10.0.60.3), 30 hops max, 60 byte packets
1 10.0.50.2 (10.0.50.2) 0.251 ms 0.219 ms 0.175 ms
2 10.0.60.3 (10.0.60.3) 0.287 ms 0.248 ms 0.266 ms
참고
다른 유용한 OSPF 명령어:
OSPF에서 IP 정보 확인하기
ubnt@R1:~$ show ip ospf
OSPF Routing Process, Router ID: 10.0.50.1
Supports only single TOS (TOS0) routes
This implementation conforms to RFC2328
RFC1583Compatibility flag is disabled
OpaqueCapability flag is disabled
Initial SPF scheduling delay 200 millisec(s)
Minimum hold time between consecutive SPFs 1000 millisec(s)
Maximum hold time between consecutive SPFs 10000 millisec(s)
Hold time multiplier is currently 1
SPF algorithm last executed 3m57s ago
SPF timer is inactive
Refresh timer 10 secs
Number of external LSA 0. Checksum Sum 0x00000000
Number of opaque AS LSA 0. Checksum Sum 0x00000000
Number of areas attached to this router: 1
Area ID: 0.0.0.0 (Backbone)
Number of interfaces in this area: Total: 1, Active: 1
Number of fully adjacent neighbors in this area: 1
Area has no authentication
SPF algorithm executed 3 times
Number of LSA 5
Number of router LSA 3. Checksum Sum 0x0000d444
Number of network LSA 2. Checksum Sum 0x00007d31
Number of summary LSA 0. Checksum Sum 0x00000000
Number of ASBR summary LSA 0. Checksum Sum 0x00000000
Number of NSSA LSA 0. Checksum Sum 0x00000000
Number of opaque link LSA 0. Checksum Sum 0x00000000
Number of opaque area LSA 0. Checksum Sum 0x00000000
OSPF 네트워크의 IP 데이터베이스 확인하기
ubnt@R1:~$ show ip ospf database
OSPF Router with ID (10.0.50.1)
Router Link States (Area 0.0.0.0)
Link ID ADV Router Age Seq# CkSum Link count
10.0.50.1 10.0.50.1 259 0x80000003 0x1f33 1
10.0.50.2 10.0.50.2 259 0x80000006 0x7131 2
10.0.60.3 10.0.60.3 279 0x80000003 0x43e0 1
Net Link States (Area 0.0.0.0)
Link ID ADV Router Age Seq# CkSum
10.0.50.2 10.0.50.2 260 0x80000001 0x283a
10.0.60.2 10.0.50.2 279 0x80000001 0x54f7
ubnt@R2:~$ show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface RXmtL RqstL DBsmL
10.0.50.1 1 Full/Backup 31.462s 10.0.50.1 eth1:10.0.50.2 0 0 0
10.0.60.3 1 Full/Backup 31.633s 10.0.60.3 eth2:10.0.60.2 0 0 0
OSPF 인터페이스 확인하기
ubnt@R1:~$ show ip ospf interface eth1
eth1 is up
ifindex 3, MTU 1500 bytes, BW 0 Kbit
Internet Address 10.0.50.1/24, Broadcast 10.0.50.255, Area 0.0.0.0
MTU mismatch detection:enabled
Router ID 10.0.50.1, Network Type BROADCAST, Cost: 10
Transmit Delay is 1 sec, State Backup, Priority 1
Designated Router (ID) 10.0.50.2, Interface Address 10.0.50.2
Backup Designated Router (ID) 10.0.50.1, Interface Address 10.0.50.1
Multicast group memberships: OSPFAllRouters OSPFDesignatedRouters
Timer intervals configured, Hello 10s, Dead 40s, Wait 40s, Retransmit 5
Hello due in 8.940s
Neighbor Count is 1, Adjacent neighbor count is 1