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Archive for May, 2014

Duplicate MAC addresses in Hyper-V

May 1, 2014 Leave a comment

We had some strange, seemingly random, things happening in our environment lately, but have had a hard time tracking down what was going on. We run a Hyper-V environment consisting of 3 host servers in a failover cluster with Server 2008R2 and an iSCSI SAN. The other day I noticed we were running out of room on our PRTG server (virtualized). When I initially created that server and setup PRTG I didn’t put a whole lot of thought into the configuration and just installed everything using defaults. The default setting puts all the data on the C drive. To fix this I created a new volume on the SAN, added two new network adapters to the PRTG server, configured everything and moved the data to the new volume. The next day we noticed a bunch of errors with iSCSI connections dropping on a different server. Read more…

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