[c-nsp] ASIC to switch port mapping

[Gert Doering]

Hi,

On Sun, Sep 12, 2010 at 07:13:33PM -0400, Keegan Holley wrote:
> You can always buy more switches and move ports.  The 2960 and the hundreds
> of other switches (and blades) just like it is a wiring closet switch for
> the enterprise.  It should be common knowledge (no offense if this is new
> information to you) that they are oversubscribed, have tiny buffers and are
> not suitable for anything but.  

Oversubscription is not the issue here, "tiny buffers" is - and indeed that
came as a big suprise as the 2950, 2970 and 3550s have larger buffers.

Read up in the archives for the lengthy discussion of the problems we
had - but basically it came down to microbursts overflowing the egress
ports, while the average egress load never exceeded 50% (!), and with
many ports unused on the switch.

gert
-- 
USENET is *not* the non-clickable part of WWW!
                                                           //www.muc.de/~gert/
Gert Doering - Munich, Germany                             gert at greenie.muc.de
fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de
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