SRv6 Capable NOS and Devices

Jeff Tantsura jefftant.ietf at
Sun Jan 16 21:19:15 UTC 2022

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 -

Geneve (there are some quirks as you get into implementing it) is another example of a well designed overlay encap.


> On Jan 15, 2022, at 23:54, Saku Ytti <saku at> wrote:
> On Sat, 15 Jan 2022 at 19:22, Colton Conor <colton.conor at> 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
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