Hi Ali & John,

The draft of 'draft-ietf-bess-evpn-overlay-02' describes how EVPN can be used 
for Overlay network, the overlay network includes VXLAN, NVGRE and MPLS Over 
GRE.

In section 13 IANA considerations, several overlay tunnel types are requested 
as follows:

8    VXLAN Encapsulation
9    NVGRE Encapsulation
10   MPLS Encapsulation   (?)
11   MPLS in GRE Encapsulation
12   VXLAN GPE Encapsulation



IMO, 8,9,11 and 12 are all overlay encapsulations, 10 is an exception. Would 
you like to explain what's the purpose of tunnel type 10?



Thanks,

weiguo

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