On 28/08/2012 17:38, Norbert Aschendorff wrote: > Configuration v6 v4 > ======================================= > Linux -> Linux 925 935 # <= This could be v6's 40B header > # vs. v4's 20B > Linux -> FreeBSD 450 700 > FreeBSD -> Linux 455 920 > ======================================= > > The FreeBSD->Linux value shows that the ethernet chip on the FreeBSD > machine (it's Intel stuff on both sides, using the em(4) driver on > FreeBSD) is able to send at full 1G speed. But why is IPv6 so slow?
There are some more numbers, FreeBSD-FreeBSD here: http://people.freebsd.org/~bz/bench/ Apparently, the software stack is capable enough so it may be a driver problem in your case.
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