Re: [Roll] [roll] #87: Can't we split the target from the RDO ?

Mukul Goyal <> Sun, 08 April 2012 15:57 UTC

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Date: Sun, 08 Apr 2012 10:56:18 -0500
From: Mukul Goyal <>
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Subject: Re: [Roll] [roll] #87: Can't we split the target from the RDO ?
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Please mark this ticket as closed.


----- Original Message -----
From: "roll issue tracker" <>
To: mukul@UWM.EDU,
Sent: Wednesday, April 4, 2012 8:09:56 AM
Subject: [roll] #87: Can't we split the target from the RDO ?

#87: Can't we split the target from the RDO ?

 Problem (proposed resolution)
 The RDO is a garbage option will all sorts of data in it. The advocated
 reason for that is conciseness since separate options mean overhead.
 OTOH, it makes more sense to have all the targets expresses as target
 options as opposed to having one target in the DRO and then all other
 targets listed after. Having the target separate would allow for a DIO
 with no RDO but only a target, which would be useful to poll a device on
 an existing DAG. Currently the draft MUST a RDO and MAY and target
 option. The suggestion is to allow for a target in DIO without a RDO.

 Proposed resolution
 Keep it at that since 1) there are implementations and 2) it's
 experimental . This resolution implies that the issue will be reopened
 should the work go for standard track


 [Pascal]" MAY carry one or more RPL Target Options to specify additional
 unicast/multicast addresses for the target."
 Now here I would have a MUST carry at least one target. That is indeed
 what makes is a lookup DIO...

 As I stated in the previous message, we need to include the target in
 the P2P-RDO to save bytes for the common case (discover route to one
 unicast/multicast target). So, we cannot make using the target option a

 [Pascal2] Certainly. I prefer the split, in which case the MUST IMHO
 goes to the target as opposed to the RDO. In a case where the RDO is not
 needed, the target only message is actually shorter...

 [Mukul2] As I said before, I think a P2P mode DIO always needs to have
 one P2P-RDO. I guess, in this case, we agree to disagree!

 [Pascal3] Certainly. And there's nothing blocking with that
 disagreement, mostly if the draft targets experimental.
 I think it's OK to keep your response as the proposed resolution for
 the issue. Still I'd like advice from others so exposing the issue as LC
 will help. Let's see on which side the coin falls.

 [Mukul3] OK. I will be happy to hear additional opinions.

 [Pascal4] Fine, let's keep that as the proposed resolution

 [Mukul4] OK.

 Reporter:  jpv@…                  |      Owner:  mukul@…
     Type:  defect                 |     Status:  new
 Priority:  major                  |  Milestone:
Component:  p2p-rpl                |    Version:
 Severity:  Submitted WG Document  |   Keywords:

Ticket URL: <>
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