Some silly tests for better understanding Cisco evpn multi-site using virtual nxos.
Wrap of results;
- Local configuration is needed as described in the documents. Border Gateways like proxies. They decapsulate the incoming traffic then route or switch the packets according to their local tables and encapsulate it towards the next-hop. So they need local defination for each incoming traffic for switching it, or finding which VRF, or VNI it belongs to. They look for the correct FIB table for routing or switching the traffic. And also they are in the middle of two EBGP domain one is intra-site the other is inter-site. They relay updates to both site. Sometimes this causes problems during troubleshoting for MAC-IP routes. Even there is no configuration for Layer 3 VNI of the MAC-IP route they advertse those routes to the inter-site without RMAC assigned. This causes invalid route on inter-site for the MAC-IP routes.
- Becarefull while using import and export statements on BGW for your VRF. This may cause promlem on your VRF policies between inter-site.