Layer 2 vs. Layer 3 to TOR

gordon b slater gordslater at
Sun Nov 15 01:59:04 CST 2009

On Fri, 2009-11-13 at 09:44 +0100, Tore Anderson wrote:
> * Jonathan Lassoff
> > Are there any applications that absolutely *have* to sit on the same
> > LAN/broadcast domain and can't be configured to use unicast or multicast
> > IP?
> FCoE comes to mind.

....and in a similar vein, ATAoE ; either Coraid stuff  or the the free
one in the Linux kernel. Its heavily used in some shops that use virtual
farms with SANS as it's cheap/free and works over existing hardware but
only at layer 2.

I even run it at home (!) - and it's a surprisingly easy way to have a
shelf of storage hanging off the back of a server, with 4GB of cache for
each set of 4 disks per box. Stand too close can feel the wind from it,
especially if RAIDed.

Depends if there's much call for VM-ing in your shop in the future?

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