A tale of NetApp and Wireshark discovery


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–==For those interested, Pluralsight has an excellent video training course called Introduction to Wireshark. I highly recommend Pluralsight as the go-to source for IT video training!==–

I was cleaning up a client’s /etc/rc file yesterday while preparing to move some IP addresses to different interfaces and I noticed they had configured the vMotion network as a VLAN interface on both controllers. This isn’t right because the vMotion network only needs to exist between ESXi hosts – the storage array never touches the traffic. Storage vMotion doesn’t use the vMotion network either.  It uses the storage network, whether IP- or FC-based.
I wanted to see if the interface was being used at all and fortunately, NetApp has a command for that. The ifstat command shows the count of frames received and transmitted on any or all interfaces, total bytes for each, and the number of multicasts or broadcasts. So in this case, it looked something like:

NETAPP-A> ifstat VIF-A-79

-- interface  VIF-A-79  (22 hours, 57 minutes, 50 seconds) --

RECEIVE
 Total frames:      150k | Total bytes:     10924k | Multi/broadcast: 21869
TRANSMIT
 Total frames:     4767k | Total bytes:      7177m | Multi/broadcast:   138
 Queue overflows:     0
DEVICE
 Vlan ID:            79  | Phy Iface:        VIF-A

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An Open Thank You to Pluralsight


This post is almost a year overdue.  I apologize to Pluralsight and the company formerly known as Trainsignal (whom Pluralsight acquired last year – I’ll refer singly to Pluralsight for the remainder) for the lateness of this post.

Thank you.  For the second year in a row, Pluralsight continued its over-the-top generosity by supplying those recognized as 2014 VMware vExperts with a free, yearly subscription to their immense IT and development training courses.

Thank you.  For the second year in a row I was blessed to be recognized as a vExpert for my contributions to the vCommunity and I received Pluralsight’s complementary subscription.

Thank you.  Many of us in IT know that our currency, the value to ourselves, our career, our clients and companies, is knowledge.  We value knowledge to a high degree.  Our livelihoods and those for which we work, to a large degree, rely on how well we know our craft.  Pluralsight’s gift of a free year of their premium IT training is incredible.  I value it so much because of the usefulness and success I’ve found with it.  Training in IT is crucial if you want to stick around very long.  One has to make it a priority if they want to succeed.  Pluralsight’s gift is like handing an IT guy a link to success.  Here you go – do great things.

Thank you.  Pluralsight, I know you didn’t have to do this. It means a lot to me that you think highly enough of this group of evangelists to give freely of your time and efforts in producing the highest quality training.

Thank you.  From a very grateful IT guy.