nanog mailing list archives

Re: Bandwidth issues in the Sprint network


From: Chris Adams <cmadams () hiwaay net>
Date: Thu, 17 Apr 2008 23:10:35 -0500


Once upon a time, Lincoln Dale <ltd () interlink com au> said:
even with tuned TCP window sizes, make sure you don't have TCP syncookies
enabled on either endpoint.

IIRC Linux (at least) syncookies only come into play when you are being
syn-flooded (i.e. when the kernel has to start dropping syns).  Having
them enabled at other times has no impact, so there's rarely (if ever) a
reason to disable them.

-- 
Chris Adams <cmadams () hiwaay net>
Systems and Network Administrator - HiWAAY Internet Services
I don't speak for anybody but myself - that's enough trouble.


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