> -----Original Message-----
> From: dte...@freebsd.org [mailto:dte...@freebsd.org]
> Sent: Saturday, March 29, 2014 10:58 AM
> To: 'Palle Girgensohn'
> Cc: freebsd-virtualization@FreeBSD.org; 'Devin Teske'
> Subject: RE: VIMAGE, epair/if_bridge or netgraph?
> > -----Original Message-----
> > From: owner-freebsd-virtualizat...@freebsd.org [mailto:owner-freebsd-
> > virtualizat...@freebsd.org] On Behalf Of Palle Girgensohn
> > Sent: Monday, June 11, 2012 2:37 PM
> > To: freebsd-virtualization@FreeBSD.org
> > Subject: VIMAGE, epair/if_bridge or netgraph?
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> > 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 , 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
> > For netgraph, there is a nice package at DruidBSD . When I found
> > that, I had already rewritten the standard jail script, using the
> > v2 patches from polymorf . 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
> >  http://forums.freebsd.org/showthread.php?t=31765
> >  http://forums.freebsd.org/showthread.php?t=31949
> >  http://druidbsd.sourceforge.net/vimage.shtml
> >  http://wiki.polymorf.fr/index.php?title=Howto:FreeBSD_jail_vnet
> [Devin Teske]
> Never saw a reply to this and I'm locating round-tuits to tackle e-mails that
> I've marked as "needing reply":
> I have not profiled
Ugh, that was originally "I have not profiled [epair but I have profiled]
> netgraph to have a limitation of 65530 eiface devices off a
> single if_bridge, but are allowed multiple bridges with that many devices.
> The problems that you run into with that many devices is that if all the
> interfaces are visible to a single jail or single host... your "ifconfig"
> command could take several hours (about 4) to enumerate each iface to the
> I didn't mess much with epair because it failed to produce a situation where I
> could speak separate subnets over the same wire. Netgraph made it easy by
> way of being able to enable promiscuous and disable the "autosrc" feature
> (as you perhaps already found in my code you linked to above).
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The information contained in this message is proprietary and/or confidential.
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