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OSPF, NAT, and Null Interface

Posted on 2007-10-03
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Last Modified: 2008-02-26
We acquired a site that happens to have an overlapping subnet. I configured the router to NAT the subnet to another subnet. We also use OSPF over Sprint MPLS for routing updates. I am having trouble getting this router to annouce this NATTED subnet.

Any suggestions??

 interface FastEthernet0/0
 ip address 192.168.1.250 255.255.255.0
 ip nat inside
 duplex auto
 speed auto
!
interface Serial0/0/0
 ip address 172.20.174.198 255.255.255.252
 ip nat outside
 service-module t1 timeslots 1-4
!
router ospf 1
 router-id 172.20.174.198
 log-adjacency-changes
 redistribute static subnets
 passive-interface FastEthernet0/0
 network 172.20.174.196 0.0.0.3 area 0
 network 192.168.41.0 0.0.0.255 area 0
!
ip classless
ip route 0.0.0.0 0.0.0.0 192.168.1.1
ip route 192.168.41.0 255.255.255.0 Null0
ip route 192.168.200.0 255.255.255.0 192.168.1.1
!
ip nat inside source static network 192.168.1.0 192.168.41.0 /24
!
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Question by:jokes54321
  • 2
3 Comments
 

Author Comment

by:jokes54321
ID: 20010841
I would also like to add,

For a quick test I added network 192.168.1.0 0.0.0.255 area 0 to the router ospf 1 section and the route was properly distributed to our other routers.
0
 

Author Comment

by:jokes54321
ID: 20018161
I found a workaround but I am not sure why it didn't work the other way.

I added a loopback1 interface with the address 192.168.41.1 255.255.255.0 and now the subnet is being distributed via OSPF.
0
 

Accepted Solution

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ID: 20211088
jokes54321,
Because you have presented a solution to your own problem which may be helpful to future searches, this question is now PAQed and your points have been refunded.

EE_AutoDeleter
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