ACI MP-BGP Route preference

[Shahin901]

Hi,

If the ACI fabric receives the same route through two different border leafs using two different protocol eBGP and OSPF, how does the non border leafs decide to take which path. 

Link to any documentation would be really helpful

Thank you in advance

Regards,

[richmond]

The preferred route will come down to standard routing protocol behaviour.

The external routes are redistributed into MP-BGP and sent over iBGP peering to the route reflectors then reflected to the other leaves.

Which route is preferred will depend on the BGP path selection process and the path attributes of the routes. OSPF will likely win in this case as the eBGP route is going to have a longer AS-PATH length.