Hi,

The ESI label is signaled in the A-D per ES route(s), and those routes are 
(should be) service agnostic.
Also as you can see in RFC7432, the ESI label is downstream allocated for 
ingress replication but upstream allocated for p2mp - So it’s not that you 
allocate different ESI label per service, but the label that you use has 
different owner.

I think RFC7432 is pretty clear about this. Not sure where the confusion is.

Thanks.
Jorge

From: gangadhara reddy chavva <[email protected]>
Date: Monday, June 3, 2019 at 2:05 PM
To: "[email protected]" <[email protected]>, "Rabadan, Jorge (Nokia - US/Mountain 
View)" <[email protected]>
Subject: SHL label

Hi Jorge,

I have a Question on EVPN MH SHL(split horizon label).

Can ESI share the different SHL label for the same ESI?

case 1: in the same ESI one customer EVPN VPN can have ingress replication for 
the BUM traffic and second EVPN VPN ine the same ESI can do P2MP? in this case 
SHL label should be different.

case 2: can VPLS allocate one SHL and VPWS can allocate diffrent SHL label? or 
SHL should be same per ESI irrespective of number of applications enabled in 
that ESI.

Thanks,
Gangadhar

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