On Fri, May 3, 2019, at 04:15, Robert Raszuk wrote: > Radu, > > The MPLS in modern DC is none starter purely from technology pov. > > In modern DCs compute nodes are your tenant PEs all talking to rest of > the fabric L3. So if you want to roll MPLS you would need to do that to > the compute nodes. That means that with exact match you will see in > MSDCs millions of FECs and millions of underlay routes which you can > not summarize. Plus on top of that an overlay say L3VPNs for the > tenant/pods reachability.
Hi, That is a specific design for a specific DC size. And even so, I see a problem with the compute nodes being the PE rather than CE. But you have a point for that case - MPLS is not for networks that grow to a certain high amount of routers (and in your case endpoints become routers). > IPv6 but all line up to a single buffer. Talking about IPv6, do you see many DCs deploying IPv6 in a menaingful way ? Just my curiosity... Those being said, I'm curious how many datacenter do you see with millions of hosts AND routing down to host level. For what I have visibility to, DCs go up to thousands of hosts (tens of thousands is already big, hundreds of thousands is huge), and network usually stops on a network device in front of them. You may not call them a "modern DC", but that's the most common occurrence. And even for the case of big and huge DCs, there is a question to be posed about where you pout a boundary for the aggregation level ? Always at DC border ? Really ? At that size ? -- R.-A. Feurdean _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
