I apologize for not using the right terminology but I'm in a weird position and I'm a newbie with MPLS.

I replaced a person who left the company in a small SP, I come from the enterprise world but I wanted to accept new challenges by accepting a position in the SP world with junior experience. My company is implementing a new overlay/underlay infrastructure in a campus and all the tenants will be invited to come onboard. The tenants of concern are those who have their "sites" spread across the campus, and over the years they have run physical cables among their switches and put in place STP. We are speaking of two or three of them.
In an unusual approach for a project (normally first come requirements and then choice of devices), the technology chosen (not by me) is EVPN-BGP and devices will be Huawei S5700, but being EVPN based on VxLAN they won't be able, afaik, to carry BPDUs. The question looks political but as engineer who finds solutions, even though temporary, I'm challenged to find a way on how to take care of the tenants I described above.

I read that in the Huawei world there are mpls l2vc and it might be the way they call VPLS and yes they should carry BPDUs. I'm not aware of a way to run on Huawei S5700 what Cisco calls Xconnect.

Question: do you have experience of environments with a mix of technologies, EVPN-BGP and VPLS? Do you see that we might eventually struggle with limits? Unfortunately EVPN-MPLS is not supported by S5700 nor my company would like to abandon completely EVPN-BGP and use for instance H-VPLS, because the tenants I refer to above will be eventually all asked to adopt a interconnecting layer compatible with an EVPN-BGP overlay and move away from STP. If you know the feature/technology in Huawei, similar to what Cisco call xconnect please let me know, that will be even simpler.



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