Cisco ASA OSPF Routing

[de1denta]

Hi All,

I'm looking to connect a Cisco ASA 5525 firewall that will provide primary internet access to our core network. I want the ASA to learn routes from our core and advertise a default route by OSPF.

I'm happy with the basic configuration here but I'm wondering if there is any advatange to have the ASA sitting in a non-backbone area instead of area 0. Are there any best practises with this scenario or is connecting the ASA to area 0 perfectly acceptable?

Thanks,

[nkarthikeyan · Accepted solution]

Hi Will,

I Suggest you to keep your ASA in Area 0, instead of non-backbone area.

I assume your asa will be having one end connected with LAN/Core LAN and other end with the public segment right.....

Then you can have the basic configuration set on ASA, as simple as possible...

router ospf 1
 router-id 1.1.1.1.
 network 1.1.1.0 255.255.255.0 area 0
 timers spf 1 10
 log-adj-changes
!

You will be running the OSPF between your edge router and asa....

Please correct me if my understanding is wrong.

Regards

Karthik

[de1denta]

Thanks Karthik.