[Beowulf] Re: Beowulf Digest, Vol 15, Issue 35
edkarns at firewirestuff.com
Tue May 17 08:13:35 PDT 2005
Details of this question are best obtained from the Folks at Texas
Instruments and NEC, the choice for FW hub chip sets ... (
In the distribution trade these are called "hubs" but in effect are
packet switching port selectors. FireWire being a simple peer to peer
network with addressed, traffic management processor and I/O for each
port = FW hubs being a node ... and an FW hub is a part of each port
set on each system.
On Monday, May 16, 2005, at 12:00 PM, beowulf-request at beowulf.org
>> Typical 1394 devices have 2 external ports plus an internal port,
>> interconnected at a sort of "hub", but it's not a passive hub. It has
>> significant smarts, maybe a "switch" might be a better conceptual
> The term "switch" in the networking world implies something very
> specific, mostly data isolation. I've often wondered if FireWire
> "hubs" do this? Given the name "hub", I've often assumed a repeater
> based technology, but I realize that's my networking bias.
> You're right. 1394 "hubs" do "edit" the data heading through.
> They're not a passive repeater. However, they do have a capability
> for very low latency pass through (that is, they're not store and
> forward, at least at a big scale).
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