[tcpm] ICMP error origination timeliness

On Sun, 6 Apr 2008, Joe Touch wrote:
> 	1) (my point) ICMPs are not required to be issued in a timely
> 	fashion, or for every individual error, a legitimate situation
> 	could involve receiving an old ICMP about an endpoint failure,
> 	without receiving further updates on any particular schedule
>
> 	2) (Fernando's point) ICMPs are currently implemented widely
> 	as not being issued in a timely fashion, with the same results
> 	as #1

What is "timely fashion" in 2)?  What is not?  What are the scenarios 
where this occurs?

ICMP error generation has always seemed "timely" to me.  The only 
exception, in a way, that I've noticed is if ICMP error origination 
rate-limiter is active at the moment the offending packet is received. 
The reason I say "in a way" is that the text above makes me think the 
point is that ICMP error generation is delayed (which rate-limiters 
don't do) rather than skipped altogether. Is point 2) referring to 
rate-limiting or something else?

-- 
Pekka Savola                 "You each name yourselves king, yet the
Netcore Oy                    kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings
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