On Tue, 18 Dec 2012, Luca Salvatore wrote:
I have a MX5 and a MX10 router connected over the Internet via a GRE
tunnel. When I do a file transfer between the two sites that these
routers connect it looks like there is some form of rate-limiting going
on. My transfer speed flat lines at about 300KB.
However I know it is not a bandwidth issue because I can have multiple
file transfers going on at once and they all sit at about 300KB. So
this shows me that I have enough bandwidth to push lots of traffic at
once, but each single stream of traffic never gets much faster than
300KB.
This sounds like the classic example of a Bandwidth-Delay product problem.
I suggest careful study of this page:
http://www.psc.edu/index.php/networking/641-tcp-tune
I've tried different MTU settings on the GRE interface without much
change, was thinking of adjusting the MSS but can't seem to figure that
out on the MX.
MSS is a function of the end stations, not of a normal router, but you are
on the right track. Adjusting the MSS of the end stations on each side
will help improve performance, most likely.
--
Brandon Ross Yahoo & AIM: BrandonNRoss
+1-404-635-6667 ICQ: 2269442
Schedule a meeting: https://doodle.com/bross Skype: brandonross
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