Plane IP underlay works real well, I’m yet to see tangible proof of TE in DC (outside of niche HPC/IB cases). SR in DC - with overlay starting on the host SR-MPLSoUDP(RFC8663) is a perfect representation of a working technology that works in IP environment as well as allows end2end programming for MPLS WAN/DCI. Here’s an example of end2end architecture that works really well - https://datatracker.ietf.org/doc/draft-bookham-rtgwg-nfix-arch/
Geneve (there are some quirks as you get into implementing it) is another example of a well designed overlay encap. Cheers, Jeff > On Jan 15, 2022, at 23:54, Saku Ytti <s...@ytti.fi> wrote: > > On Sat, 15 Jan 2022 at 19:22, Colton Conor <colton.co...@gmail.com> wrote: > >> True, but in general MPLS is more costly. It's available on limited >> devices, from limited vendors. Infact, many of these vendors, like >> Extreme, charge you if you want to enable MPLS features on a box > > Marketing, not fundamentals. DC people are driving demand for VXLAN > and SRv6, because they assume MPLS is something scary and complex. So > vendors implement something scary and complex to appease DC people. > I'm sure in some years to the future, DC people will re-invent MPLS to > simplify their stack. > > -- > ++ytti
