Date: Sat, 27 Apr 2002 19:28:45 -0600 From: "John Nielsen" <oniblerz@attbi.com> To: <freebsd-hackers@FreeBSD.ORG>, "Gary Stanley" <gary@outloud.org> Subject: Re: load balancing with 2 nic cards possible? Message-ID: <025801c1ee54$0a6661f0$0900a8c0@max> References: <5.1.1.2.2.20020426234504.029f7c30@208.141.46.3>
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----- Original Message -----
From: "Gary Stanley" <gary@outloud.org>
To: <freebsd-hackers@FreeBSD.ORG>
Sent: Friday, April 26, 2002 9:47 PM
Subject: load balancing with 2 nic cards possible?
> Is it possible to split the load of IP traffic with 2 ethernet cards on a
> 4.x machine? I'm new to "load balancing" in a sense, however, I'd like to
> try something that seems more "robust"
The netgraph one2many framework allows you to aggregate 2 or 4 NICs together
even on an unmanaged switch. Obviously, this is only really beneficial if
the machine is serving several clients attached to the same switch or if
there is another machine set up similarly (also on the same switch), since
unmanaged switches generally only have one uplink port.
See the ng_one2many(4) manpage for details. Following is a script I use to
set this up (I call it from rc.local). fxp0 is the "primary" interface and
rl0 is the "secondary".
JN
---------------------
#!/bin/sh
ifconfig rl0 up
kldload /modules/ng_ether.ko
kldload /modules/ng_one2many.ko
ngctl mkpeer fxp0: one2many upper one
ngctl connect fxp0: fxp0:upper lower many0
ngctl connect rl0: fxp0:upper lower many1
ngctl msg rl0: setpromisc 1
ngctl msg rl0: setautosrc 0
ngctl msg fxp0:upper setconfig "{xmitAlg=1 failAlg=1 enabledLinks =[ 1
1 ] }"
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