This is very good summary of the motivation for extensions. GUE design was
given quite thought on that.
For supporting tunnel stitching (draft-yong-nvo3-tunnel-stitching), it requires
a new field in the encap. protocol to carry the next tunnel identifier. GUE can
easily support that by
Alia has asked that we provide some more information as to what the
motivations for extensions are for nvo3 and to what form they should
take. Here is some high level explanation with respect to GUE.
Six fundamental extensions have been defined for GUE
1) VNID (draft-hy-nvo3-gue-4-nvo-03)
2)
