From owner-freebsd-hackers  Fri May  3  0:35: 7 2002
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Date: Fri, 3 May 2002 08:35:01 +0100 (BST)
From: =?iso-8859-1?q?andrew=20mejia?= <mejia_bsd@yahoo.co.uk>
Subject: Re: network design
To: Terry Lambert <tlambert2@mindspring.com>,
	Bogdan TARU <bgd@icomag.de>, freebsd-hackers@FreeBSD.ORG
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 --- Terry Lambert <tlambert2@mindspring.com> wrote: >
Terry Lambert wrote:
> > Unfortunately, the FreeBSD ethernet interface
> isn't terribly
> > smart.  Ideally, it would provide a virtual
> interface per VIP,
> > all the way down to the card; it doesn't.
> 
> Probably wasn't very clear here.
> 
> The Tigon II, for example, supports 4 VIPs, the
> Intel Gigabit
> ethernet supports 16 VIPs (VIP-based virtual MAC
> addresses;
> see the VRRP RFC for details).
> 
> THis means that for a Tigon II card, instead of
> just:
> 
> 	tg0
> 
> You should have one interface per MAC address.  So
> if you set
> two additional MAC addresses on the card (no
> interface for this
> in FreeBSD currently), then you should have:
> 
> 	tg0	<- hardware MAC
> 	tg0a	<- VRRP MAC #1
> 	tg0b	<- VRRP MAC #2

[andrew]$  exactly what i would suggest.  a single
NIC can handle multiple assigments pretty easily,
unless you're expecting mega-traffic.  but even then
you could use the native load balancing/caching tech-
nology offered with some other freewares (like 
apache web server).

> You also need to handle "active" vs. "inactive". 
> You should
> leave the interface "up" (resetting a Tigon II
> interface
> reloads the firmware because FreeBSD doesn't have a
> seperate
> "init" vs. "attach entry point for firmware
> loading), and be
> able to control turning ARP responses on and off for
> the card
> to avoid confusing the hell out of switches.
> 
> If you are confused, read the RFC and look at the
> Linux and
> commercial VRRP implementation documentation. 
> There's
> nothing really "secret" about VRRP.
> 
> -- Terry
> 
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