[SunHELP] Gigabit Ethernet?

[Larry Snyder]

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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