Miguel Garcia skrev:
> Hi Suresh:
> 
> Inline comments (only those that deserve a bit more discussion).
> 
> /Miguel
> 
> Pyda Srisuresh wrote:
>> Miguel,
>>
>> Thank you for the comments. Please see my responses inline.
>>
>> regards,
>> suresh
>>
>> --- Miguel Garcia <[EMAIL PROTECTED]> wrote:
>>
>>> I have been selected as the General Area Review Team (Gen-ART)
>>> reviewer for this draft (for background on Gen-ART, please see
>>> http://www.alvestrand.no/ietf/gen/art/gen-art-FAQ.html).
>>>
>>> Please resolve these comments along with any other Last Call comments
>>> you may receive.
>>>
>>> Document: draft-ietf-behave-nat-icmp-05.txt
>>> Reviewer: Miguel Garcia <[EMAIL PROTECTED]>
>>> Review Date: 2007-10-09
>>> IESG LC end date: 2007-10-11
>>>
>>> Summary:
>>>
>>> Comments:
> 
>>> - Section 4.1 discusses the checksum of the payload for TCP and UDP
>>>    packets that are embeded in ICMP Error messages. What about UDP-lite
>>>    (RFC 3828) packets with partial checksum coverage? Applying the same
>>>    rules as for UDP would drop legitimate packets. I think the draft
>>>    should say what the NAT should do with respect ICMP Error messages
>>>    that contain UDP-lite packets.
>>>
>> [suresh] There are a few things to note here.
>>
>> a) REQ-3d is transport protocol agnostic and is stated as follows.
>> This is
>> applicable to UDP-lite as well, assuming the NAT device supports
>> UDP-lite.
>>
>>    If the embedded packet contains the entire transport segment,
>>    and the transport protocol of the embedded packet requires the
>>    recipient to validate the transport checksum, and the checksum
>>    fails to validate, drop the error packet.
>>
>> b) UDP-Lite is an independent transport protocol with a protocol
>> identifier of
>> its own (136). The Behave WG has not dicussed protocols other than TCP
>> and UDP.
>> RFC4787 (UDP BEHAVE) does not discuss UDP-lite either.
>>
>> So, I dont believe, it woudl be necessary to include specific comment
>> about
>> UDP-lite in this document.
>>
> 
> Well, if you think that the checksum validation covers the UDP-lite case
> with partial checksums, then I would agree that the draft covers the
> case, and there is no action for the document. In my opinion, it is a
> hidden from the reader, but that is just my opinion.
> 
> I now understand that you don't want to open the can of worms and start
> considering all the protocols that are encapsulated in ICMP Error messages.
> 

I think that we can live with the present text.

> 
>>> - Abbreviations should be expanded at the first appearance, e.g., NAT
>>>    and ICMP in the title, ICMP in the Abstract as well, etc.
>>
>> [suresh] OK, I will expand NAT to be "Network Address translator" in
>> the title.
>> However, I dont believe, it is necessary to expand on well known terms
>> like IP
>> and ICMP.
>>
> 
> Before I wrote this comment I went to the RFC Editor policy web page,
> http://www.rfc-editor.org/policy.html#policy.abbrevs and I didn't find
> "ICMP" in the list of accepted abbreviations without expansion. You can
> try to leave the term unexpanded, then it will be up to the RFC editor
> to decide.
> 

I would leave the title and expand it in the abstract.

I expect an updated draft before progressing this.

Cheers

Magnus Westerlund

IETF Transport Area Director & TSVWG Chair
----------------------------------------------------------------------
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Ericsson AB                | Phone +46 8 4048287
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