ospf to eigrp redistribution

[benreynolds]

Hi all,

I'm distributing ospf to eigrp (onto a MPLS WAN) via a cisco asa 5510 vers 8.2.5.

In short everything is generally ok but I am getting classfull networks redistributed from the ASA into the eigrp AS.

Heres an extract of the config if someone could scan:

access-list OSPFtoEIGRP standard permit 172.17.x.x 255.255.255.252

access-list OSPFtoEIGRP standard permit 10.0.x.x 255.255.252.0

access-list OSPFtoEIGRP standard permit 10.0.x.x 255.255.252.0

access-list OSPFtoEIGRP standard permit 10.0.x.x 255.255.248.0

access-list OSPFtoEIGRP standard permit 10.0.x.x 255.255.240.0

access-list EIGRPtoOSPF standard permit 10.x.x.0 255.255.255.192

access-list EIGRPtoOSPF standard permit 10.x.x.128 255.255.255.240

access-list EIGRPtoOSPF standard permit 10.x.x.144 255.255.255.240

access-list EIGRPtoOSPF standard permit 10.x.x.192 255.255.255.192

route-map EIGRPtoOSPF permit 10

match ip address EIGRPtoOSPF

!

route-map OSPFtoEIGRP permit 10

match ip address OSPFtoEIGRP

router eigrp 9

no auto-summary

distribute-list OSPFtoEIGRP out ospf 100

distribute-list EIGRPtoOSPF in interface Outside

eigrp router-id 172.x.x.x

network 172.x.x.x 255.255.255.252

passive-interface Inside

redistribute ospf 100 metric 1000000 100 255 1 1500 route-map OSPFtoEIGRP

Heres the troublesome routes being distributed.

show eigrp top output:

P 10.0.0.0 255.0.0.0, 1 successors, FD is 28160

        via Redistributed (28160/0)

P 172.17.0.0 255.255.0.0, 1 successors, FD is 28160

        via Redistributed (28160/0)

The rest of the sh eigrp top looks good and is redistributing the required routes within net 10 etc.

Any help would be appreciated.

regards

Ben

[Reza Sharifi]

Hi,

Have you tried clearing the EIGRP process?

clear eigrp pid 9

HTH

[benreynolds]

Hi Reza - Thanks for the response - The ASA lets me clear the route within the process via:

clear eigrp 9 topology 10.0.0.0

but no clear eigrp pid 9 or clear eigrp 9.

I have also shut - no shut the interface to complete a hard reset for the adjacency in addition to

clear eigrp 9 neighbors outside which also results in the same issue being present.

think it's time to look at caveats on the IOS.

Best regards

Ben

[zheng.olivier]

I'm not sure that it may help but, "no auto-summary" in the ospf routing process.

[benreynolds]

Thanks for the suggestion Oliver.  OSPF is default as no auto-summary hence I'm unable to enter the command.

I've upgraded the IOS on the ASA now and I still see the same issue?  Must be somewhere in my config I think.  At least I hope so.

regards

Ben

[zheng.olivier]

From the show ip eigrp top output, you see that the routes are redistributed from OSPF, so I think the problem comes from the filtering.

I don't really get the reason why you filter using the route-map in the redistribute command and you filter using distribute list in the same time. The both call the same ACL (OSPFtoEIGRP) but there are used in 2 different directions (OSPF--> EIGRP via redistribute command and EIGRP-->OSPF via distribute list).

Maybe you're mix the direction of your distribute-list with the name of your ACLs : distribute out should use EIGRPtoOSPF (you're filtering the update send to OSPF process) and distribute in should use OSPFtoEIGRP.