Nandu, thanks your good job and here is my smalls nits though.

Typo:

In Abstract
s/problem/problems

In Security Considerations
s/6LoWPAN/LoWPAN (Throughout the draft, LoWPAN terminology is in use except 
here, so LoWPAN would be fine)
s/prevelant/prevalent
s/compramise/compromise


Comment:

In Security Considerations, you are refering to AES for 802.15.4 secured mode 
amongst three security modes (unsecured, ACL and secured). To understand AES 
easily, please add a new reference into the References Section as follows;

[AES]    National Institute of Standards and Technology. FIPS Pub
             197: Advanced Encryption Standard (AES). 26 November 2001.


Discussion:

>7. Security Considerations.
>
>IEEE 802.15.4 provides AES link layer security.  As 6LoWPAN imposes
>unique set of challenges that are not prevelant in classical
>etworks, security threats across various layers should first be
>understood before choosing any security protocol.  

>Furthermore, these
>devices may not have any front end to do configuration and
>management.  As such protocols must be chosen to have very little
>configuration and management, but still not compramise on either
>connectivity nor security.

It seems not clear for me. As you pointed out, the sentences above should be 
further study before addressing anything. So, I am suggesting not to add these 
text at this stage...



Regards,

Daniel (Soohong Daniel Park)
Mobile Platform Laboratory, SAMSUNG Electronics.

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