IPv4 vs. IPv6 Ethernet Performance

[Ivan Voras]

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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