Dear sirs. I make two small datacenters and want to use VXLAN tunnel over L3, link between them.
In each DC I have two switches and VRRP virtual IP as default gateway.
But if I have single address space in both DC, what is best practice for this case?
I think about filterring part of address space to annonce via EVPN to other side but may be I think wronk :-)
If I'm understanding correctly, you have two datacenters that share the same IP address space. For example, DC1 uses 192.168.0.0/24 and DC2 uses 192.168.0.0/24. In this case, multi-tenancy would be the first thing I would look at for a possible solution. Multi-tenancy would be introducing VRF technology via L3 VNI's allowing you to interconnect both datacenters with a multi-site VxLAN. There would be complexities if the two networks need to communicate with each other.
Here's a link to an article discussing route-leaking between the tenants and examples on how to deploy BGP EVPN VxLAN with multi-tenancy:
Thank you I will read this and answer You after.