Re: [Autoconf] new charter

Carlos Jesús Bernardos Cano <cjbc@it.uc3m.es> Fri, 27 February 2009 07:24 UTC

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From: Carlos =?ISO-8859-1?Q?Jes=FAs?= Bernardos Cano <cjbc@it.uc3m.es>
To: HyungJin Lim <dream.hjlim@gmail.com>
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Date: Fri, 27 Feb 2009 08:24:34 +0100
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Subject: Re: [Autoconf] new charter
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Hi Hyung-Jin,

	Answer inline below...

El vie, 27-02-2009 a las 10:37 +0900, HyungJin Lim escribió:
> Hi Carlos,
>  
> This is Hyung-Jin, Lim
> 
> I have a question.
> See the inline....
> 
>  
> 2009/2/27 Carlos Jesús Bernardos Cano <cjbc@it.uc3m.es>
>         Hi Alex:
>         
>                One question below.
>         
>         El jue, 26-02-2009 a las 20:44 +0100, Alexandru Petrescu
>         escribió:
>         > Sorry, I made an error indeed putting same prefix.  How
>         about this
>         > updated picture with the prefixes being distinct:
>         >
>         >
>         >          -----  wifi "adhoc1"  ------  wifi "adhoc2"  -----
>         >         |Host1|---------------|Router|---------------|Host2|
>         >          ----- LL1         LL2 ------ LL3        LL4  -----
>         >                G1                                G4
>         >
>         >
>         >         "adhoc1" and "adhoc2": 802.11 ESSIDs in "ad-hoc"
>         mode.
>         >                                Each is an IPv6 subnet.
>         >         LL1...4: IPv6 link-local addresses.
>         >                  Self-formed according to rfc2464.
>         >         G1, G4:  IPv6 global addresses, for example
>         >                  2001:db8:1::1/64 and
>         >                  2001:db8:2::4/64
>         >                  Manually assigned, or pre-configured with
>         SNMP
>         >                  or formed according to stateless autoconf
>         rfc4862;
>         >                  the prefixes are advertised by Router in
>         RAs.
>         >
>         
>         
>         Does this model only apply to Host-Router-Host scenarios? I
>         mean, does
>         this model apply for Router-Router-Router scenarios? I fully
>         agree the
>         model fits the first scenario, but I don't for the second,
>         since
>         routers' mobility within the ad-hoc network would force them
>         to change
>         prefixes often, I guess. For those scenarios it might be
>         better to think
>         of addressing models in which MANET routers are configured
>         with /128
>         (or /32 for IPv4) addresses, so they don't need to change
>         their
>         addresses as a result of link changes.
>  
> Does AUTOCONF not consider "ad-hoc network to Internet" scenario ?
> If so, I agree your comment.
> But if not, your pointing out is not reasonable I think.
> In case of this situation, MANET routers may need to change their
> addresses for connectivity/packet forwarding/packet routing to
> Internet.

I think AUTOCONF considers connection to Internet, but even in that
case, I think my comment still holds. It's true that in a connected
scenario, the addressing depends on the infrastructure the MANET is
attached to, but this doesn't necessarily imply that inner nodes have to
change their addresses when move within the same MANET.

Kind Regards,

Carlos

>  
> Best regards,
> Hyung-Jin Lim
>  
>  
>         
>         Kind Regards,
>         
>         Carlos
>         
>         --
>         
>          Carlos Jesús Bernardos Cano     http://www.netcoms.net
>          GPG FP: D29B 0A6A 639A A561 93CA  4D55 35DC BA4D D170 4F67
>         ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>          WEEDEV 2009: 2nd Workshop on Experimental Evaluation and
>                Deployment Experiences on Vehicular networks
>                          http://www.weedev.org/
>         ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>         
>         
>         _______________________________________________
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-- 
 Carlos Jesús Bernardos Cano     http://www.netcoms.net
 GPG FP: D29B 0A6A 639A A561 93CA  4D55 35DC BA4D D170 4F67
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  WEEDEV 2009: 2nd Workshop on Experimental Evaluation and
        Deployment Experiences on Vehicular networks
                  http://www.weedev.org/
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++