topic ASA receiving two default routes to internet via OSPF in Network Security

ASA receiving two default routes to internet via OSPF

deyster94 — Tue, 26 Mar 2019 00:50:30 GMT

I am trying to test something for a client. If I have an ASA that receives two default routes to the internet via OSPF, will it load balance those connections? I have a feeling the answer is 'no.' If that is the case, would the ASA would be at least able use the second internet connection if the primary one becomes saturated?

TIA,

Dan

ASA receiving two default routes to internet via OSPF

Julio Carvajal — Mon, 08 Apr 2013 16:51:54 GMT

Hello,

The ASA does not support 2 default routes across different interfaces, you can have up to 3 as long as they are using the same outgoing interface of the ASA.

Do you follow me?

Regards

ASA receiving two default routes to internet via OSPF

deyster94 — Mon, 08 Apr 2013 18:17:43 GMT

Yes, I know that the ASA cannot have default routes on multiple interfaces. Both of the default routes are coming into the ASA's outside interface. There would be two routers and the ASA in area 0 for OSPF. The routers would have the default-information originate command in their OSPF configuration to push the default route out to the ASA.

ASA receiving two default routes to internet via OSPF

Julio Carvajal — Mon, 08 Apr 2013 18:27:19 GMT

Hello Deyster94,

Then the ASA should be learning both of them,

Regards,

Julio Carvajal S.

ASA receiving two default routes to internet via OSPF

deyster94 — Mon, 08 Apr 2013 18:29:17 GMT

So since it will learn both default routes, will it use both of them to send traffic to the internet?

ASA receiving two default routes to internet via OSPF

Julio Carvajal — Mon, 08 Apr 2013 18:30:46 GMT

Hello Deyster,

Yes, Sr .

As long as they are going out the same interface ( in your case outside )

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