OSPF for Routed Access : Limitations

[bouvot_julien]

Hi everyone,

I'm trying to understand IP-Base OSPF limitations on Cisco 3750 switches.

I have read this :

"OSPF for Routed Access: Starting from Cisco IOS Release 12.2(55)SE, the IP Base image supports a new feature called OSPF for Routed Access. OSPF for Routed Access is designed specifically to enable you to extend Layer 3 routing capabilities to the wiring closet. It supports only one OSPFv2 and one OSPFv3 instance, with a maximum number of 200 dynamically learned routes."

But, I have implemented "OSPF for Routed access" on some switches with one instance and my routing table has got about 400 routes dynamically learned of this type :

#show ip route

O       172.XX.YY.ZZ/31 [110/4] via 172.XX.YY.86, 1d00h, GigabitEthernet1/0/3

                        [110/4] via 172.XX.YY.84, 1d00h, GigabitEthernet1/0/1

How can you explain that?

Does this limitation has others criterias?

Thanks a lot.

J.B

[Peter Paluch]

Hello Julien,

What you posted here is a single destination network with two equal cost paths towards it. Is it possible that your routing table contains 200 unique destination networks, each of them having two next hops?

Best regards,

Peter

[Pedro Henrique Almeida Rodrigues]

Hi Julien,

I'm searching about this. My enviroment have more than 400 routes and I need know if there is some limitation of routes in the process OSPF.