Re: [Mipshop] WG Last Call on DHCP options for ANDSF

[Subir Das <subir at research.telcordia.com>]

Hello Xiangsong,
Sorry for my late reply. My answers inline.

regards,
_Subir

Xiangsong Cui wrote:
> Hello,
>
> I have read the document and I have two comments.
>
> 1,  RFC3315 says "Unless otherwise noted, each option may
>     appear only  in the options area of a DHCP message and may
>     appear only once."
>    And in the sections 4 and 5 of the draft,  it is unclear whether
>    ANDSF IPv6 Address option and ANDSF Domain Name List
>    option may appear in DHCP message multiple times. I suggest
>    an explicit statement should be included in the document.
>    (DHCPv4 options have been mentioned, multiple smaller options
>     may be used)
SD> We do assume that the requesting and sending of the DHCPv6 options
        follow the rules described in RFC 3315 and is mentioned in 
Section 6.2.
        Therefore we believe that there is no need to add any 
additional statement.
    
> 2,  In section 3, ANDSF Domain Name List Option for DHCPv4,
>     if the option payload is a domain name list, it seems each domain
>     name in the list is a suboption. 
     SD>  Each domain name in the list is not a suboption. It is still 
an option with
      two ANDSF servers  with a boundary.
> In the example, 
> +-----+---+---+---+---+---+---+---+---+---+---+---+---+---+---+ | XX  
> |26 | 7 |'e'|'x'|'a'|'m'|'p'|'l'|'e'| 3 |'c'|'o'|'m'| 0 | 
> +-----+---+---+---+---+---+---+---+---+---+---+---+---+---+---+ 
> +---+---+---+---+---+---+---+---+---+---+---+---+---+ | 7 
> |'e'|'x'|'a'|'m'|'p'|'l'|'e'| 3 |'n'|'e'|'t'| 0 | 
> +---+---+---+---+---+---+---+---+---+---+---+---+---+ the character 
> "0" looks to be the boundary, is it true?
  SD> Yes it is true
> I noticed a draft, 
> http://tools.ietf.org/id/draft-ietf-dhc-option-guidelines-05.txt,
> in the section 8, it introduces the dangers of suboptions.
>
> For this reason, I think there is another way for the case of domain 
> name list, only one domain name appears in each
> option and multiple options are used to represent the domain
> name list. For the same example:
> +-----+---+---+---+---+---+---+---+---+---+---+---+---+---+
> | XX  |12 | 7 |'e'|'x'|'a'|'m'|'p'|'l'|'e'| 3 |'c'|'o'|'m'|
> +-----+---+---+---+---+---+---+---+---+---+---+---+---+---+
> +-----+---+---+---+---+---+---+---+---+---+---+---+---+---+
> | XX  |12 | 7 |'e'|'x'|'a'|'m'|'p'|'l'|'e'| 3 |'n'|'e'|'t'|
> +-----+---+---+---+---+---+---+---+---+---+---+---+---+---+
> Is it considerable?
>
> Regards
>
> Xiangsong
>
> ----- Original Message ----- From: "Vijay Devarapalli" 
> <vijay at wichorus.com>
> To: <mipshop at ietf.org>
> Sent: Thursday, August 13, 2009 5:29 AM
> Subject: [Mipshop] WG Last Call on DHCP options for ANDSF
>
>
> > Hello,
> >
> > draft-das-mipshop-andsf-dhcp-options-01.txt describes DHCP options for
> > discovering ANDSF network entities. ANDSF stands for Access Network
> > Discovery and Selection Function. It is a concept developed by 3GPP and
> > is used for assisting the mobile nodes in discovering various access
> > networks and selecting the most appropriate one based on various
> > factors.
> >
> > This draft is a not MIPSHOP WG document. It will be standardized as an
> > AD-sponsored document. However, we feel that it would be useful to run a
> > WG last call in the MIPSHOP WG to solicit comments and get some reviews.
> >
> > So, this is a two week working group last call for
> > draft-das-mipshop-andsf-dhcp-options. You can find the document at the
> > following URL.
> >
> > http://www.ietf.org/id/draft-das-mipshop-andsf-dhcp-options-01.txt
> >
> > The last call expires on August 26th 2009.
> >
> > Please post any issues or comments on this document to the MIPSHOP WG
> > mailing list. In case you have reviewed the document and found no
> > issues, it would be good to know.
> >
> > Vijay
> > _______________________________________________
> > Mipshop mailing list
> > Mipshop at ietf.org
> > https://www.ietf.org/mailman/listinfo/mipshop
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