1 L3Out with 2 BGP peer

[daniel.tanch]

Hi,

Will like to check if I had 1 L3Out but BGP peer to different ISP (A & B). But when advertise route, I only want to advertise all to ISP A instead of ISP B, is this workable? Or I will need to create another L3Out for ISP B?

In IOS, we can create something like this:

ip prefix-list R3HOST sec 5 permit 190.153.116.0 /22
or
access-list 1 permit host 190.153.116.0

route-map R3 10
match ip address prefix-list R3HOST
or
match ip address 1

router bgp 65471
neighbor 10.10.0.1 prefix R3HOST out

router bgp 65471
neighbor 10.10.0.1 route-map R3HOST out

[Timothy Rothenberg · Accepted solution]

Right now, route profiles (route-maps) are per-L3out, not per-neighbor, so you will need to create a second L3out if you want to restrict prefixes towards one peer.

[Timothy Rothenberg]

Support for per-neighbor (BGP) route-maps was added in ACI 4.2, released last week.  This document explains how to configure it: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/aci/apic/sw/use-case/Cisco-ACI-Support-for-Route-Control-Per-BGP-Peer.html