Re: [arch-d] ETSI launches new group on Non-IP Networking addressing 5G new services

[Dino Farinacci <[e-mail]>]

> I don't think i need to run a lot of new things end-to-end across
> the planet. I'd be happy if i can run it across a metro space to
> edge-DCs. at least for everything commercially relevant. 
> global DC to DC traffic is typically across variety of priate
> networks anyhow.

Even if you had a completely new 4-hop network (non-IP) with multiple paths, you could not guarantee zero packet loss. And what I understand from the requirements, you can’t have delayed packets either. So retransmission cannot be used as a tool.

So the only option you have with a new protocol or with IP is to send the same packet over diverse paths. The more diverse paths you have, the greater probablity the packet will not be dropped. And for Brian’s point, you have to measure queuing delay to you can pick 5 out of the 10 diverse paths that meet your delay requirement. And the delay will change so quickly, packet will already be launched into a congestive path. 

You can only do this with an overlay so the edge of the network can select different paths by simply changing the destination address (either with tunneling or translation). But its a hard problem that may be unsolvable. You would have to set expectations very clearly what this new architecture provides and how and when it fails.

Having said that, you may as well build solutions that are IP based. You don’t really need an IPvN.

Dino