From: Ryan Morris (ryan@egate.net)
Date: Sun Sep 30 2007 - 22:40:48 ART
It drops packets based on queue depth. It doesn't care what kind of IP
packet it is.
Although it doesn't say it explicitly, the answer is here:
"In considering the usefulness of RED when robust transports such as TCP
are pervasive, it is important to consider also the seriously negative
implications of employing RED when a significant percentage of the traffic
is not robust in response to packet loss. Neither Novell NetWare nor
AppleTalk is appropriately robust in response to packet loss, therefore
you should not use RED for them."
UDP is a non-robust transport, and would not benefit (in fact could suffer
greatly) from having a large number of random packets dropped.
Regards,
Ryan Morris
CCIE #18953
On Sun, 30 Sep 2007, Michael Brooks wrote:
> All,
>
> I have a $1 dollar bet with one of my colleagues that RED or even WRED
> (depending on how its configured) does drop UDP packets. He states that
> since the congestion avoidance mechanisms of RED only works on TCP flows
> that only TCP packets will be dropped "only". The problem is I have been
> searching and can't find any good documentation to back up my theory. Also,
> I haven't had time to test in the lab. Does anyone have some good
> links proving one of our theories (preferably mine ;-) ). Your input would
> be greatly appreciated.
>
> Thank you,
> Mike
>
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