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

[Richard Kelsey <[e-mail]>]

> Date: Wed, 4 Apr 2012 08:54:52 -0500
> From: Mukul Goyal <[e-mail]>
> 
> >The G flag is 0 if and only if the DODAG is floating.
> 
> I think that the G flag is 1 if and only if the DODAG is grounded.

I agree.  G = 0 means floating, G = 1 means grounded.

> 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.  

                                         -Richard Kelsey

> ----- Original Message -----
> From: "Richard Kelsey" <[e-mail]>
> To: [e-mail]
> Cc: [e-mail], [e-mail], [e-mail]
> 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 <[e-mail]>
> > 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
>