Ospf point-to-point

[raza555]

Hi,

Need clarification that two routers know they’re the only OSPF routers on the link and so they exchange routes with each other.

As per below config can R1 (10.1.1.2) will be able to talk with R4 (10.1.1.14), as they are in same OSPF AREA 0.
If not then what changes need to be made without changing the point-to-point type.

1) R1<-p2p->R2

2) R3<-p2p->R4
---
3) R2<-p2p->R10

4) R4<-p2p->R10

R1:
router ospf 1
in G0/1
ip add 10.1.1.1/30
ip ospf network point-to-point
ip ospf 1 area 0

R2:
router ospf 1
in G0/1
ip add 10.1.1.2/30
ip ospf network point-to-point
ip ospf 1 area 0
!
int G0/2
ip add 10.10.2.1/30
ip ospf network point-to-point
ip ospf 1 area 0

================
R3:
router ospf 1
in G0/1
ip add 10.1.1.13/30
ip ospf network point-to-point
ip ospf 1 area 0

R4:
router ospf 1
in G0/1
ip add 10.1.1.14/30
ip ospf network point-to-point
ip ospf 1 area 0

!

in G0/2
ip add 10.10.4.1/30
ip ospf network point-to-point
ip ospf 1 area 0

======
R10:
in G0/2
ip add 10.10.2.2/30
ip ospf network point-to-point
ip ospf 1 area 0
!
int G0/4
in G0/1
ip add 10.10.4.2/30
ip ospf network point-to-point
ip ospf 1 area 0

[Georg Pauwen]

Hello,

all routers are able to talk to each other using your configs, so you don't need to change anything. Obviously there is no redundancy, so if any of the links fail, there is no alternate path...

[paul driver]

Hello

---

@raza555 wrote:

As per below config can R1 (10.1.1.2) will be able to talk with R4 (10.1.1.14), as they are in same OSPF AREA 0.
If not then what changes need to be made without changing the point-to-point type.

---

Not sure what you are asking?
The above query depends on what router/link you change to non backbone areas.
For example if you change R1 and R2 to be in different non backbone areas leaving R10,R4,R3 in area 0, then R1 will be isolated from the rest of the network because it will need to be reached across the two ABR rtrs, (R2, R10) and R2 area link towards R1 isnt attached to the backbone area 0 and this would be irrespective of what network type it is running.