Document: draft-thaler-v6ops-teredo-extensions-07
Reviewer: Roni Even
Review Date: August 4, 2010
IETF LC End Date: 2010-08-12
IESG Telechat date: (if known)

Summary: This draft is roughly ready for publication as a Proposed Standard.

I have some comments:

Major issues: None

Minor issues:

1.  In section 4.1 defines type-length-value (TLV) encoded trailers. Can 
new trailers be defined later and if yes what is the procedure to do it and 
assign type numbers. If new trailers are not allowed it will be good to 
state it also.

2.  In section 5.6.4.1 it says that “the Alternate Address Trailer MUST 
include the node's local address/port in the Alternate Address/Port list.  If 
the UPnP Mapped Address/Port is non-zero, the Alternate Address Trailer 
MUST also include it in the list.” I understood from 3.5 and 6.5 that UPnP 
support on the NAT is required in which case the alternate address trailer 
must have a UPnP address or is the requirement for UPnP is needed only 
when the two peers are connected via more than one NAT in the private address 
space as section 3.5 and 6.5 describe. Please clarify.

Nits/editorial comments: none