IPv6: Why the first IP of my block decided to live its own life without me
I operate servers where we use BGP (EVPN - VXLAN). The architecture is similar to the one described by Vincent Bernat. The hypervisors act as routers for the VMs. When I designed the addressing plan, I used IPv4/IPv6 networks in /24 and /64 respectively with the gateway VIPs positioned on the first available IP: 10.0.0.1/24 and fdc0:3489:e0fd::/64. This topology has been working perfectly for 2 years. Recently, we had to deploy a dedicated VM for interconnecting two VRFs. We use iBGP sessions for route exchange between a VM and a hypervisor. ...