We are currently having perfectly working IPv4 network with a typical layout - internal network with all servers splitted to VLANs in 10.0.0.0/8 (each vlan is /24) and external network with public ip addresses. IPv4 addresses are NATed to the internal network via 2 redundant linux boxes.
We got /48 IPv6 range and gateway (nothing more) from our ISP. I am able to configure static IPv6 on my firewall to test IPv6 connectivity, which works. However, I would like to split that /48 IPv6 range to smaller groups and advertise them further. I can imagine that I end up with configuration where each VLAN will have:
- 1x /24 IPv4 internal IP range within 10.0.0.0/8
- 1x /64 IPv6 external IP range within our public IP range
With IPv6, I would like to stop using IPv4, stop using internal IPv4 network and keep IPv4 addresses only on services that need to keep the compatibility. I want to avoid of NAT in the future.
The question is, what is the best practice to do this on linux?
Is there any way, I can tell my provider next hop to pass the /64 ranges through? Does IPv6 support this? Or I need to ask him to set up a static route to my gateways?