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Hi,

I'm updating some jail servers, and want to use VIMAGE. Compiled it into
the kernel, learned the hard way not to even include PF in the same
kernel [1], so now it works quite well.

I am setting up many similar jails, some for testing, some for
production. The applications are web servers, som tomcat+apache's, and
some other standard type of services like email and ldap, simple stuff.
I need no fancy network control, I just need it to work. For each jail
there are two interfaces, one public, connected to a software bridge
(if_bridge or ng_bridge) acting as a switch, and one internal, for
maintenance, connected to a different software bridge. To each software
bridge, I connect a physical external interface from the jail host.

I am trying to decide whether to use epair and if_bridge, or to use
netgraph. For netgraph, there is a nice package at DruidBSD [3]. When I
found that, I had already rewritten the standard jail script, using the
v2 patches from polymorf [4]. They work equally fine for my purpose.

So now I need to know which scales best, is there a difference in
performance or stability between netgraph and epair/if_bridge?

Cheers,
Palle


[1] http://forums.freebsd.org/showthread.php?t=31765

[2] http://forums.freebsd.org/showthread.php?t=31949

[3] http://druidbsd.sourceforge.net/vimage.shtml

[4] http://wiki.polymorf.fr/index.php?title=Howto:FreeBSD_jail_vnet
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