lots of network interfaces

[dteske at freebsd.org]

I decided to stress-test the netgraph(4) subsystem one day and was able to
create 65530 interfaces before it produced an error, refusing to create another.

At that point, the system was still usable, but...

It took over an hour for ifconfig to list all the interfaces. Simply typing
"ifconfig" with no arguments and pressing ENTER would start spewing information
on-screen for over an hour before it finished. (so I'd say that there could be
some optimizations made; but nonetheless impressive that the system was still
very usable at that point, ifconfig aside).
-- 
Devin

> -----Original Message-----
> From: owner-freebsd-hackers at freebsd.org [mailto:owner-freebsd-
> hackers at freebsd.org] On Behalf Of Wojciech Puchar
> Sent: Thursday, March 07, 2013 3:25 AM
> To: freebsd-hackers at freebsd.org
> Subject: lots of network interfaces
> 
> are there any scalability limits in case of lots of network interfaces.
> i am asking for ca 800 tun(4) interfaces active but no more than 250Mbit/s
> over them total.
> 
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