[nomnombunty]

I have doubts about how useful the ExaLink Fusion is in practice. Many exchanges require at minimum a layer 3 switch to terminate at the cross connect. In those cases, you cannot directly connect an ExaLink switch to the exchange.

I am quite surprised that no one mentioned the Cisco nexus 3548. Switching at L2 with 110ns latency is not that impressive considering that the Csico nexus 3548 switches packet at (L2/L3) with 50ns (with warp span turned on) http://www.cisco.com/c/en/us/products/switches/nexus-3548-sw...

[deadgrey19]

I think this is what they mean when they call it a "layer2+" device.

110ns is the device in its capacity as a full layer 2(+) switch. The "warp span" equivalent would be using the layer broadcast groups functionality which runs at 5ns, 10x faster.