[Beowulf] Switching

Paul K Egell-Johnsen paul.k.egell.johnsen at gmail.com
Thu Jun 9 06:06:02 PDT 2005

Usually you can't connect more than one cable between two switches.
The switches will not bundle those to gain higher bandwidth. However
on a managed switch you might be able to create separate networks,
then you can connect one cable for each network to your existing

Most switches can also use 2Gb optical connections between them and
other switches. And in higher series there are other direct
interconnects in order to cascade the switches.

You should look into what your current switch is able to do, and then
select your new switch based on that.


On 6/8/05, Robert Kane <rkane at connect.carleton.ca> wrote:
> Good afternoon,
>   I'll most likely be looking to expand my current cluster, and the
> number of new nodes purchased will be greater the capacity of the
> current switch (a Cisco 6509 with a Supervisor Engine 1A).
>   My plan is take the spill-over nodes (about 32) and place them on a
> separate switch. Just a simple, cheap 48 port GigE switch. These nodes
> would only be for workup so a high-bandwith/low-latency connection to
> the rest of the nodes is not crucial.
>   Connecting the switches together is where my knowledge starts to fall
> down. I do want some amount of bandwith between the two switches. Is it
> possible to do something like simply connect the two switches using a
> handful of GigE cables?
> Thanks,
> Roob
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Paul K Egell-Johnsen

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