Re: NATFW issue: state 'transit' timer definition

[writing with chair's hat off, i.e., as NATFW NSLP author only!]

Hi,

I do assume that everybody is fine with the proposed change.

If not, please speak up now!

Thanks, 

  Martin (as NATFW NSLP author)


Am 24.01.2008 11:22 Uhr schrieb "Martin Stiemerling" unter
<[email protected]>:

> [writing with chair's hat off, i.e., as NATFW NSLP author only!]
> 
> Hi all,
> 
> I finally found time to get back to the NATFW NSLP and your WGLC comments.
> Thanks to all who did a review and sent in their comments!
> 
> I also have done a complete review of draft-ietf-nsis-nslp-natfw-16.txt and
> found some issues to be discussed. There will be separate e-mails for each
> issue I've found. 
> 
> Here we go:
> 
> In Section 3.2.8.  NATFW NSLP Signaling Sessions the different conceptual
> states of the a NATFW NSLP signaling session are defined. I see all states are
> fine except the last one which is 'transit':
> 
> Transit: The node has received an asynchronous message, i.e., a
> NOTIFY, and can delete the NATFW NSLP signaling session if needed.
> When a node has received a NOTIFY message (for instance,
> indicating a route change) it marks it as 'Transit' and deletes
> this NATFW NSLP signaling session if it is unused for some time
> specific to the local node.  This idle time does not need to be
> fixed, since it can depend on the node local maintenance cycle,
> i.e., the NATFW NSLP signaling session could be deleted if the
> node runs it garbage collection cycle.
> 
> The issue is see, is the undefined timer value in this state. It simply says
> "...for some time..." which can result in implementations removing state
> immediately (time = 0), wait for seconds or minutes, or do never remove the
> state (would be a bug indeed). 
> 
> I personally would prefer to either give a fixed value or to give a formula to
> calculate this time in a standardised way. 
> 
> My proposal: Set this timer to 30 seconds fixed, as if there is no updating
> CREATE or EXTERNAL message within 30 seconds to a 'transit' state there won't
> be anything beyond this anymore.
> 
>   Martin
> 
>  
> [email protected]
> 
> NEC Laboratories Europe - Network Research Division
> 
> NEC Europe Limited | Registered Office: NEC House, 1 Victoria Road, London W3
> 6BL | Registered in England 2832014
>  
> 
> 
> 
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