[Roll] RPI Option Type in useofrplinfo

[Rahul Jadhav <[e-mail]>]

While reading section related to RPI Option Type, I had some doubts:

Section 4.3 states,
"In the case of rebooting, the node (6LN or 6LR) does not remember the
RPL Option Type (i.e., whether or not the flag is set), so DIO
messages sent by the node would be sent with the flag unset until a
DIO message is received with the flag set, indicating the new RPI
value. The node will use the value 0x23 if it supports this feature."

[RJ] A node can initiate a DIO only when it decides to attach itself to the Instance/DAG based on DIO received from the upstream node. Thus a 6LR/6LN __will always have a ref value to use from its parent's DIO__. The para states, ".... so DIO messages sent by the node would be sent with the flag unset until a DIO message is received with the flag set.....". This may be incorrect because the node will always have a flag ref from config option from DIO rcvd from upstream node.
Subsequently, in the same para, the text says, "The node will use the value 0x23 if it supports this feature." Do you mean even if the flag in Config option is not set it can use 0x23 if it supports the feature? This doesn't seem right! Contradicts with other stmts in the same section for e.g., "Thus, when a node join to a network will know which value to use."
>From my point of view, this para is not needed since there is no impact on 6LR/6LN for this flag because of the reboot operation.

Regarding the terminology: The draft terms, the new option type as "RPI Option Type" (value 0x23) and the old "RPL Option Type" (value 0x63). Is this correct?

Thanks,
Rahul