We are working on a project to provide Internet access to select Linux guests
on z/VM. The network team plans to use separate OSA's and virtual switches for
this. For the initial testing, there will be one OSA and virtual switch for
the presentation zone and a separate OSA and virtual switch for the secure
zone. These are in addition to the existing virtual switch that we already
have on our internal network. The network people have also asked for separate
virtual switch controllers. Is there any reason to create separate controller
virtual machines (DTCVSWx) for these virtual switches? My understanding is
that no data flows through the controllers. They're just used to manage the
virtual switches. I believe there was a statement from IBM that the two
default controllers, DTCVSW1 and DTCVSW2, are sufficient for any number of
virtual switches. Is there any security risk if the same controllers manage
virtual switches for multiple zones?
Dennis
"I want to express my gratitude to my family. To my mother and father who
instilled in me the values that have carried me this far." -- former U.S.
Representative Anthony Wiener, during his resignation speech
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