The IP Over NBMA (ION) Archive

Cell Relay Retreat>ION Archive>month:1996-Jun> msg00176



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ION contribution

  • From: "M.J. Robinson" <92mjr1@eng.cam.ac.uk>
  • Date: Mon, 24 Jun 1996 15:48:27 +0100 (BST)
  • cc: ion@nexen.com

Russell and other IONers,

> > o Should holdtime for a NAK be less than that of a normal reply ?
> The "holdtime" in an NHRP packet is zero when it is a NAK.  Maybe you
> were not referring to "Holding Time" in the packet.
	Well spotted - the main aim of this was to consider the rate at
which we send Requests (limited by whatever means). Given the current
spec, what rate do we send Requests for the unreachable destination ? 
More importantly, how do we want the Requester to behave ?

	At present, some implementations might send Requests every 60 
seconds, while others would send them more frequently. We need to send 
them often enough (or have another mechanism) to ensure that we detect 
the recovery of a route "fast enough". Too many Requests would be bad 
news though.

	Would increasing the backoff time (possibly exponentially and
within limits) be useful ? 

		Matthew.