[SunHELP] Gigabit Ethernet?

[Larry Snyder]

Not at all.  Consider the case where a router proxy-arps for hosts
behind it.  arp is the glue between layers 2 & 3.  You can have
more than 1 layer 3 on 1 layer 2.  You don't want to go the other way.
-ls-

Kevin Stevens <Kevin_Stevens at pursued-with.net> wrote:
> Makes sense, thanks!  Doesn't it freak out the arp tables of devices
> accessing this box when they see duplicate MACs for different addresses?
> 
> KeS
> 
> On Wed, 13 Feb 2002, Larry Snyder wrote:
> 
> > The heartburn comes when you have two _physical_ interfaces on the same
> > shared media with the same mac.  You haven't added a physical, so
> > layer two doesn't have to guess where to ship the packet (actually frame).
> > I used 'ifconfig qeX ether (some hex mac)' to get around the physical
> > problem before I knew about the OBP local-mac-address directive, but
> > I had about 3 i/f's visible to the same switch from that box.  Layer
> > three sub's are nowhere near as problematic :-)
> > -ls-
> >
> >
> > Kevin Stevens <Kevin_Stevens at pursued-with.net> wrote:
> > > On Wed, 13 Feb 2002, Larry Snyder wrote:
> > >
> > > > If they come up with the same mac address on two different ports on the
> > > > same switch (or vlan), you'll drive the switch nuts trying to decide which
> > > > port is right.  ifconfig -a as root will tell you if this is the case,
> > > > and is a way to change it.  It's also an option in OBP.
> > > > Good luck,
> > > > -ls-
> > >
> > > In this same vein, I need to assign a virtual interface to my 3Com NIC in
> > > an x86 Solaris box on the same network as the primary interface.  First,
> > > there wasn't a local-mac-address variable set at all per eeprom - I set it
> > > anyway.  I can create secondary interfaces, but the ifconfig ether option
> > > won't accept alternate MAC addresses.  Just for the hell of it I created a
> > > secondary and addressed it with another IP on the same network.  It
> > > doesn't seem to be freaking out, but for the life of me I don't understand
> > > why.
> > >
> > > KeS
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