Here is the current situation we have built a L2 only EVPN to stretch a L2 service between 3 locations. Locations 2 and 3 are single connected from ASR540's to Catlyst Switches. The Catalyst switches have a SVI configured with IP addresses 100.100.100.1 and 100.100.100.2 respectively. Locations 2 and 3 can ping each other across the EVPN core. Site 1 consists of 2 ASR9K's connected to a pair of Nexus 9K switches. The ASR9K's are configured in an EVPN mult-home all-active configuration, and the Nexus 9K switches are configured to use VPC to attach to the ASR9K's. We have configured SVI's on each of the Nexus 9K switches, 100.100.100.101 and 100.100.100.102. The Nexus 9K switches can ping one another, but they cannot ping either location 2 or 3, 100.100.100.1 or 100.100.100.2.
Looking at the evpn evi vpn-id xxx mac table, the ASR9K's are not learning the mac address for the SVI's from Nexus 9K switches. These in turn are not getting advertised in BGP and locations 2 and 3 are not learning the MAC for the Nexus SVI's. The Nexus switches are also not learning the MAC addresses for location 2 or 3 switches from the ASR9K's; however when I look at the ASR9K's I see that they are learning locaiton 2 and 3 MAC addresses from BGP.
The question I'm looking to answer is why doesn't this work?
