L3out not receiving routes

[JlassiAhmed0345]

in my ACI fabric, I have an L3out BGP peering between  Border Leaf and a Fortinet Firewalls, my problem is that I don't receive the default route that is advertised by the firewall via the L3out, in the other hand in firewall I can see the routes of BD that are advertised by ACI . for further investigation related to the issue, I've checked the BGP peering is OK on the firewalls side as well as on the Border leaf, also I've checked the advertised routes from the firewalls towards ACI and I clearly see that there is a default route is advertised . on the ACI side, I've checked the BGP routing Table of the appropriate VRF and I cannot see any routes that come from the BGP peering except the routes of the local BD.  

as you see below the configuration of the external epg of the L3out 

here is the Vzany contract that is provided by the external EPG

here is the config of the vzany :

here as you see the routes advertised by the firewall to ACI 

here is the routing table of Border leaf : as you see i cannot received the default-route .

please is there any idea concerning the issue?

[M02@rt37]

Yes @JlassiAhmed0345 

As I said: That should explain why ACI Fabric (Border Leaf) drop that announce as loop prevention.

Ok, add a feature on FortiGate side, with this neighbor: add as-override. 

Clear ip bgp soft and tell me it LB receive this default route from FortiGate.

[JlassiAhmed0345]

thank you M02@rt37  very much.

On Monday I will do what you propose and let you know about the result.

[M02@rt37]

You're very welcome @JlassiAhmed0345 

Yes, thanks for a feedback on Monday!

[JlassiAhmed0345]

Hello M02@rt37 

I tried to configure the AS-override on the firewall side but it's not working so I tried to configure Allow Self AS in the AC and then received the routes from the firewall.

[M02@rt37 · Accepted solution]

Perfect @JlassiAhmed0345 

[RedNectar]

Ooops - ignore