Re: [Roll] Opinion please

["Julien Abeille (jabeille)" <jabeille at cisco.com>]

Hi all,

To eliminate children the parent can send DIO with infinite rank right
away? Or just resetting trickle, and starting T, which would expire
quickly.

Julien

> -----Original Message-----
> From: roll-bounces at ietf.org [mailto:roll-bounces at ietf.org] On 
> Behalf Of Michael Richardson
> Sent: vendredi 6 novembre 2009 02:18
> To: roll WG
> Subject: Re: [Roll] Opinion please
> 
> 
> >>>>> "Jerald" == Jerald P Martocci 
> <Jerald.P.Martocci at jci.com> writes:
>     Jerald> I certainly favor the simplicity of Option 1 over 
> Option 2;
>     Jerald> however last week we also had an Option 3 which was my
>     Jerald> favorite - that being that the node simply does 
> not join the
>     Jerald> DAG.  Option 1 as described, indicates that the node joins
>     Jerald> the DAG as a leaf node.  My question is - how does a node
>     Jerald> even know it's a leaf node?  My understanding is that DAG
> 
>     mcr>   It knows it's a left node because it knows that it failed
>     mcr> to find a compatible OFy.
> 
>     Jerald> Why is this a discriminator?  The node could have other
>     Jerald> child nodes already attached to itself prior to the node
>     Jerald> attaching onto the DAG.  This set of nodes could 
> all ascribe
>     Jerald> to the same OFy, yet be different that the OFx of the main
>     Jerald> DAG.
> 
> okay, so if a node (AA) that implements OFy picks a new 
> parent that has only OF0, it could then tell all it's 
> children that it now has OF0, and those children, expecting 
> OFy, would be in the same situation as AA.
> It can't forward OFx, because it really doesn't understand OFx.
> 
>     mcr>   When it's a leaf node, it does not process the DIOs that
>     mcr> it receives, and does not forward that information (list of
>     mcr> prefixes, etc.) to it's parent.
> 
>     Jerald> Ok.  I assumed that to eliminate newly found children the
>     Jerald> node would stop sending DIOs.  However, I wasn't sure if
>     Jerald> DIOs are needed to be sent out periodically for other
>     Jerald> reasons.
> 
> I'm a bit vague on this myself. I think that it has to 
> unicast DIOs to it's parent.  It should not be multicasting 
> DIOs if it doesn't want to be a parent.
> 
> -- 
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