[Ns-bugs] [Bug 253] ARP does not retry upon loss
bugzilla-daemon at nsnam-www.ece.gatech.edu
Mon Jul 21 10:20:02 PDT 2008
------- Comment #7 from craigdo at ee.washington.edu 2008-07-21 13:20 -------
> > 3) use a per-cache timer
[ ... ]
> > I really prefer 3 above.
> I would be fine with this, thanks.
When I initially thought about the problem I came to the conclusion that a
per-cache timer would be best; but when I looked at Linux I found per-entry
I believe the primary reason you would swallow this overhead is to avoid a
"thundering herd" of retries which you could get if you scanned the entire
cache on a single timer expiration; especially if we were to someday start
aging the entries in the cache.
Since our default position is to do it like Linux, I thought multiple timers
were were expensive but justifiable.
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