[CentOS-virt] dummy ethernet interfaces

Caitlyn O'Hanna ravenoak at virtualxistenz.com
Fri Jan 23 19:38:28 UTC 2009

On Fri, 2009-01-23 at 11:02 -0800, Grant McWilliams wrote:

> I just tested my dummy0 network connection and I can scp at 40MB/sec
> which definitely puts it above the 100Mb/sec limit. Where does it
> identify itself as being 100Mbit?

Actually, I don't know how to tell it its speed, or for that matter I
seem to not be able to find out what it thinks its speed is.  And, of
course when I try doing an scp, it xfer'd a 100MB file at ~16.7MB/s, so
this may have just been an issue in the past and has magically changed
speeds (I hate random magic...).  I do remember doing an scp and seeing
only ~1MB/s speeds.

For completeness, and I'd also like to bump it up to 1000Mb/s or higher
if I can, how would I go about finding out it's speed and changing it?
ethtool says 'No data available' and mii-tool says "SIOCGMIIPHY on
'pdummy0' failed: Operation not supported".

Thanks for any help :)


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