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[EFM] About OAM TLVs

1.  The most recent draft (2D) defines "Organization Specific Information
TLV".  It contains OUI, which is also incuded in the mandatory Local
Information TLV's Vendor Identifier. Why the duplication? Taking up extra 3
bytes is not an issue, but it opens up the question of how to interpret if
it's different from that in Local Information TLV. If they are supposed to
be same, then we have to enforce it.

2. Currently this Organization Specific Information TLV can only be included
in Information PDU, which I think limits its usefulness. 

I would propose a generic organization specific TLV that is allowed to be
included in all PDUs except Variable Request and Responsel. Doing so helps
make OAM more useful. For example, when sending dying gasp, an vendor could
include a private TLV that explains what caused the dying gasp.

Appreciate any comments. Thanks.

Yonghong Ren
Appian Communications