Category Archives: Troubleshooting

Brocade Network Advisor Performance Graphs flatline

One of the regularly used features in BNA is the ability to retain performance numbers and a history of port errors. It is then most annoying when these...

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Port counters may be flawed.

As a support-guy you very often look at port counters. These do not only provide insight into the status of a port but also may give statistical information...

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Cross-fabric collateral damage

Ever since the dawn of time the storage administrators have been indoctrinated with redundancy. You have to have everything at least twice in order to maintain uptime and...

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Short stroking disk drives to improve performance

Reading a post from Hans DeLeenheer (VEEAM) which ramped up quite a bit including responses from Calvin Zito (HP), Alex McDonald (NetApp) and Nigel Poulton. The discussion started on a...

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FCIP configuration, pitfalls and troubleshooting

FCIP has been around for quite a while. The fine engineers of CNT/McData/Brocade/Rhapsody/Vixel (you name them) saw early one that a method was needed to overcome the, back...

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Unexpected FCIP tunnel utilisation

This week I had a very interesting question from one of the fellow blog readers. Why do I see no traffic on a new FCIP tunnel when I...

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Queue-depth

I recently was involved in a discussion around QD settings and vendor comparisons. It almost got to a point where the QD capabilities were inherently linked to the...

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Signal quality and link stability

I really think I should stop with fillword discussions but here is one more. What happens even if you have set the correct fillword, have made sure all...

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Brocade Network Advisor – Java memory size.

Houdini was a master in getting out of these things. Out of a swimming pool with a Straight-Jacket on I mean. This week I had an analogy to...

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Fillwords IDLE vs ARBff (one last time)

I’ve written about fillwords a lot (see here, here, and here) but I didn’t show you much about the different symptoms an incorrect fillword setting may incur. As...

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