Layer 2 vs. Layer 3 to TOR

Simon Leinen simon.leinen at
Sun Nov 15 13:17:35 UTC 2009

Tore Anderson writes:
> * 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.

Doesn't FCoE need even more than that, i.e. "lossless" Ethernet with
end-to-end flow control, such as IEEE DCB? As far as I understand,
traditional switched Ethernets don't fit the bill anyway.

On the other hand iSCSI should be fine with routed IP paths; though
Malte's mail suggests that there are (broken?) implementations that aren't.

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