nanog mailing list archives

Re: Strange public traceroutes return private RFC1918 addresses


From: Niels Bakker <niels=nanog () bakker net>
Date: Tue, 3 Feb 2004 20:34:26 +0100

Leo Bicknell wrote:
because at the higher data rates (eg 40 gige) it makes a huge difference
in host usage.  You can fit 6 times in the data in a 9K packet that you
can in a 1500 byte packet, which means 1/6th the interrupts, DMA
transfers, ACL checks, etc, etc, etc.

* pete () he iki fi (Petri Helenius) [Tue 03 Feb 2004, 19:47 CET]:
This is wrong. Interrupt moderation has been there for quite a while, 
DMA is chained and predictive.

Just like the extra chopping up of the data you want to send into more
packets, it's things you have to do a few extra times.  That takes time.
There is no way around this.  What Leo wrote is in no way wrong.


ACL checks I can agree on, but if you are optimizing the system, what
do you need ACL?s for anyway because you can make the applications
secure in the first place?

You're trolling, right?


        -- Niels.

-- 
Blessed are the Watchmakers, for they shall inherit the earth.

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