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TOPIC: OSPF question.

OSPF question. 6 years 8 months ago #33969

  • sam4sg
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I have 4 routers.

R1 R2 R3 R4.

R1 is advertising its route via OSPF to R2 R3 and R4.

from R1

router ospf 1
log-adjacency-changes
redistribute eigrp 1 subnets
network 204.200.2.0 0.0.0.255 area 0
network 204.204.5.0 0.0.0.255 area 21
!
router ospf 11
log-adjacency-changes
redistribute eigrp 1 subnets
network 204.200.1.0 0.0.0.255 area 0
network 204.204.5.0 0.0.0.255 area 31
!
router ospf 20
log-adjacency-changes
redistribute eigrp 1 subnets
network 204.200.3.0 0.0.0.255 area 0
network 204.204.5.0 0.0.0.255 area 41

From R2

router ospf 2
log-adjacency-changes
redistribute eigrp 1 subnets
network 62.239.1.0 0.0.0.255 area 0
!
router ospf 10
log-adjacency-changes
redistribute eigrp 1 subnets
network 62.239.2.0 0.0.0.255 area 0
!
router ospf 20
log-adjacency-changes
redistribute eigrp 1 subnets
network 204.200.3.0 0.0.0.255 area 0
!

R3

router ospf 10
log-adjacency-changes
redistribute eigrp 1 subnets
network 62.239.2.0 0.0.0.255 area 0
!
router ospf 11
log-adjacency-changes
redistribute eigrp 1 subnets
network 204.200.1.0 0.0.0.255 area 0
!
router ospf 3
log-adjacency-changes
redistribute eigrp 1 subnets
network 165.21.110.0 0.0.0.255 area 0
!
ip classless


R4
router ospf 1
log-adjacency-changes
redistribute eigrp 1 subnets
redistribute eigrp 2 subnets
redistribute eigrp 3 subnets
network 204.200.2.0 0.0.0.255 area 0
!
router ospf 2
log-adjacency-changes
redistribute eigrp 1 subnets
redistribute eigrp 2 subnets
redistribute eigrp 3 subnets
network 62.239.1.0 0.0.0.255 area 0
!
router ospf 3
log-adjacency-changes
redistribute eigrp 1 subnets
redistribute eigrp 2 subnets
redistribute eigrp 3 subnets
network 165.21.110.0 0.0.0.255 area 0


problem is that the network advertised by R1 network 204.204.5.0 0.0.0.255 area 21 is only appearing on Router 4. it does not appear on R2 or R3. However, the eigrp routes pushed via ospf from R1 reaches all other routers. Just its own 204.200.5.0 reaches 1 , but not others.

What could be the issue?


Thanks,
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Re: OSPF question. 6 years 8 months ago #34011

  • Chojin
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Forgive me for not putting any effort in your config (short in time atm :p).

Can you post the full configs for the routers?

Just a couple of thoughts:

1)
If you are also running EIGRP besides OSPF your routing tables, your routing tables will display the EIGRP routes because of the lower AD. (ofcourse if your prefix is more accurate it would show even if it ospf)

2)
OSPF works with area-types. Within these area types not all LSA (Link state advertisements) are allowed. It could be you have configured your area's as stub.


p.s.
We will solve this problem :-)
CCNA / CCNP / CCNA - Security / CCIP / Prince2 / Checkpoint CCSA
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