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 <saku@ytti.fi> wrote:

On Sat, 15 Jan 2022 at 19:22, Colton Conor <colton.conor@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