Re: [Roll] [roll] #86: G flag: do we need that text?

Mukul Goyal <mukul@uwm.edu> Wed, 04 April 2012 14:32 UTC

Date: Wed, 04 Apr 2012 09:31:46 -0500
From: Mukul Goyal <mukul@uwm.edu>
To: Richard Kelsey <richard.kelsey@ember.com>
Message-ID: <1449714963.1808443.1333549906211.JavaMail.root@mail17.pantherlink.uwm.edu>
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Subject: Re: [Roll] [roll] #86: G flag: do we need that text?
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Richard,

>> The temporary DAGs used in P2P-RPL are not grounded, they are
>> temporary. I think that all transient/temporary DAGs are
>> floating by their very nature.

>This I don't follow at all.  If a device has a temporary need to
send or receive data from many other devices, it makes perfect
sense for it to create a a temporary, grounded DODAG.  If there
is a lot of P2P traffic, it makes perfect sense to have permanent,
floating DODAGs for routing that traffic.  

Let me modify my statement a little:

Transient DAGs used in P2P-RPL are floating by their very nature. Their lifetime is fleetingly small. They are not used for routing. They impart no connectivity to the nodes joining them.

Thanks
Mukul

> ----- Original Message -----
> From: "Richard Kelsey" <richard.kelsey@ember.com>
> To: roll@ietf.org
> Cc: mukul@UWM.EDU, jpv@cisco.com, roll@ietf.org
> Sent: Wednesday, April 4, 2012 8:36:50 AM
> Subject: Re: [Roll] [roll] #86: G flag: do we need that text?
> 
> > From: roll issue tracker <trac+roll@trac.tools.ietf.org>
> > Date: Wed, 4 Apr 2012 13:08:50 +0000
> > 
> > #86: G flag: do we need that text?
> > 
> >  Problem (resolition is proposed)
> >  ------------------------------
> >  Disagreement on the meaning of 'G' bit and imposed setting to 0;
> > 
> >  Proposed resolution
> >  ---------------------------
> >  The origin sets the G flag based on its perception of whether joining
> >  how the flag's value would affect the rank calculation under the OF
> >  being used. By default, the G flag is set to zero given the temporary
> >  nature of the DAG being created.
> 
> I disagree with the proposed resolution.  It adds needless
> confusion.  The G flag is 0 if and only if the DODAG is floating.
> There is no point to allowing floating DODAGs with a P2P-RDO
> option.  I suggest that the G bit be set to 1 and that routers be
> explicitly prohibited from creating floating DODAGs with a
> P2P-RDO option.
>                                    -Richard Kelsey
>

[Roll] [roll] #86: G flag: do we need that text? roll issue tracker
Re: [Roll] [roll] #86: G flag: do we need that te… roll issue tracker
Re: [Roll] [roll] #86: G flag: do we need that te… Richard Kelsey
Re: [Roll] [roll] #86: G flag: do we need that te… Mukul Goyal
Re: [Roll] [roll] #86: G flag: do we need that te… Pascal Thubert (pthubert)
Re: [Roll] [roll] #86: G flag: do we need that te… Mukul Goyal
Re: [Roll] [roll] #86: G flag: do we need that te… Richard Kelsey
Re: [Roll] [roll] #86: G flag: do we need that te… Mukul Goyal
Re: [Roll] [roll] #86: G flag: do we need that te… Mukul Goyal
Re: [Roll] [roll] #86: G flag: do we need that te… Richard Kelsey
Re: [Roll] [roll] #86: G flag: do we need that te… Pascal Thubert (pthubert)
Re: [Roll] [roll] #86: G flag: do we need that te… Mukul Goyal
Re: [Roll] [roll] #86: G flag: do we need that te… Michael Richardson
Re: [Roll] [roll] #86: G flag: do we need that te… Philip Levis
Re: [Roll] [roll] #86: G flag: do we need that te… Pascal Thubert (pthubert)
Re: [Roll] [roll] #86: G flag: do we need that te… Mukul Goyal
Re: [Roll] [roll] #86: G flag: do we need that te… Pascal Thubert (pthubert)
Re: [Roll] [roll] #86: G flag: do we need that te… Mukul Goyal
Re: [Roll] [roll] #86: G flag: do we need that te… Pascal Thubert (pthubert)
Re: [Roll] [roll] #86: G flag: do we need that te… roll issue tracker
Re: [Roll] [roll] #86: G flag: do we need that te… roll issue tracker
Re: [Roll] [roll] #86: G flag: do we need that te… roll issue tracker
Re: [Roll] [roll] #86: G flag: do we need that te… JP Vasseur