CCNA 15강 수업내용

@LSAs(Link State Advertisement) : Interface상태, Network정보, Metric값
LSAs          Type
Intra           O(같은 Area)
Intra           O(같은 Area)
Intel            IA(다른 Area)     --> ABR(Area Boudary Router)
Intel            IA(다른 Area)     --> ABR(Area Boudary Router)
External      E2(다른 Domain) --> ASBR(AS Boundary Router)


-Area 정보 같을 때
R2#sh ip route
     172.11.0.0/24 is subnetted, 2 subnets
O       172.11.1.0 [110/49] via 192.168.1.1, 00:00:20, Serial1/0
O       172.11.0.0 [110/49] via 192.168.1.1, 00:00:20, Serial1/0

-Area 정보 다를 때
R1
conf t
router ospf 1
no network 172.11.0.0 0.0.0.255 area 0
no network 172.11.1.0 0.0.0.255 area 0
network 172.11.0.0 0.0.0.255 area 1
network 172.11.1.0 0.0.0.255 area 1
end

R2#sh ip route
     172.11.0.0/24 is subnetted, 2 subnets
O IA    172.11.1.0 [110/49] via 192.168.1.1, 00:00:23, Serial1/0
O IA    172.11.0.0 [110/49] via 192.168.1.1, 00:00:23, Serial1/0

R2#sh ip ospf border-router
i 1.1.1.1 [48] via 192.168.1.1, Serial1/0, ABR, Area 0, SPF 6


-다른 Domain 일때
R1
conf t
int lo 2
ip add 172.11.2.1 255.255.255.0
int lo 3
ip add 172.11.3.1 255.255.255.0
exit
router rip
version 2
network 172.11.0.0
no auto-summary
exit
router ospf 1
redistribute rip subnet
end

R2#sh ip router
O E2    172.11.3.0 [110/20] via 192.168.1.1, 00:00:44, Serial1/0
O E2    172.11.2.0 [110/20] via 192.168.1.1, 00:00:44, Serial1/0

R2#sh ip ospf bordor-router
i 1.1.1.1 [48] via 192.168.1.1, Serial1/0, ABR/ASBR, Area 0, SPF 7

@OSPF Summary
-Manual Summary(ASBR)
Router(config)#router ospf <process id>
Router(config-router)#summary-address <summary network><netmask>

R1
conf t
route ospf 1
summary-address 172.11.2.0 255.255.254.0
end

R2#sh ip route
O E2    172.11.2.0/23 [110/20] via 192.168.1.1, 00:00:23, Serial1/0

-Area Summary (ABR)
R2#sh ip rote
O IA    172.11.1.0/24 [110/49] via 192.168.1.1, 00:11:47, Serial1/0
O IA    172.11.0.0/24 [110/49] via 192.168.1.1, 00:11:47, Serial1/0

R1
conf t
router ospf 1
area 1 range 172.11.0.0 255.255.254.0
end

R2#sh ip route
O IA    172.11.0.0 [110/49] via 192.168.1.1, 00:00:11, Serial1/0

@Dafault Route
R1
conf t
router ospf 1
default-information originate always
end

R2#sh ip route
O*E2 0.0.0.0/0 [110/1] via 192.168.1.1, 00:00:08, Serial1/0

@OSPF Authentication
-Neighbor
Text
!--R1
conf t
int s1/0
ip ospf authentication
ip ospf authentication-key cisco
end

!--R2
conf t
int s1/0
ip ospf authentication
ip ospf authentication-key cisco
end


MD5
!--R1
conf t
int s1/0
no ip ospf authentication
ip ospf authentication message-digest
ip ospf authentication-key cisco
end

!--R2
conf t
int s1/0
no ip ospf authentication
ip ospf authentication
ip ospf authentication-key cisco
end


-Area
Text
!--R1
conf t
router ospf 1
area 0 authentication
exit
int s1/0
ip ospf authentication-key cisco
end

!--R2
conf t
router ospf 1
area 0 authentication
exit
int s1/0
ip ospf authentication-key cisco
end

MD5
!--R1
conf t
router ospf 1
area 0 authentication message-digest
exit
int s1/0
ip ospf authentication-key cisco
end

!--R2
conf t
router ospf 1
area 0 authentication message-digest
exit
int s1/0
ip ospf authentication-key cisco
end