SFP in -INF state

The entire IT industry is packed with mathematics. So instead of keeping things easy we need to work our way around imposed restriction that have been imposed on us by history.

When hardware was developed 1 to 5 decades ago things were (maybe still are) very expensive. Every corner was cut to keep costs low in order to be to sell anything. You can have the latest and greatest but if you’re pricing yourself out of the market the shelf-life of your shares becomes very short and at some stage you basically cease to exist. Companies like DEC and SUN have found out the hard way. Fabulous marvels of engineering but lack of sales and marketing efforts aligned to that engineering feat basically failed to gain sufficient traction in the market and as such they are no more.

Going back to the hardware restrictions and the SFP -INF state

You may encounter some output from an sfpshow (Brocade) or “show transceiver detail” (Cisco) like this:

Temperature: 46 Centigrade
Current: 6.428 mAmps
Voltage: 3261.5 mVolts
RX Power: -inf dBm (0.0 uW)
TX Power: -3.3 dBm (464.2 uW)

So what does that mean? Read on.

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Config Guide, Troubleshooting ,

FOS 8.2.1 – the one that is required.. or not?

Like clockwork Brocade releases new FOS version around every 6 months. No news here. FOS 8.2.1 is however a release you may need to pay special attention to especially if you have X6 director class switches hooked up to a 240 volt, 50 Hz power mains as well as sitting between a rock and a hard place with the 7800 extension switch but don;t have the budget to go to a relatively pricey 7840. One other thing is the change in licensing hardening on pizza-box switches which makes the upgrade to this release a one-way street without being able to go back.

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Brocade Technical, Config Guide, Troubleshooting , , ,

Logs, Logs, Logs and more Logs

Nice title especially if you’re in the lumberjack business. 🙂 All kidding aside. Support engineers rely 100% on these things and if we’re asking for them please don’t hesitate to provide them.

It has been ventilated a fair amount of time that some people see this as some sort of “delay-tactic” from support engineers but nothing can be farther from the truth. Main reason is that we don’t get any benefit anyway, it doesn’t solve your problem nor does it dismiss us from providing you a timely solution to your problem..

Read on…………..

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Uncategorized

Release notes and upgrades. Decision time.

Ughh, upgrades, maintenance, risk of downtime, out of hours work and pulling all-nighters or even weekends when your wife and kids start wondering who that strange man is that sometimes shows his face through the back-door.

But what made you decide to do the upgrades on your OS, firmware, applications etc.

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When to replace an SFP

Maybe the title should be “When to NOT replace an SFP” as I see in many occasions it is seen as a first option of fixing problems. In reality the SFP is one of the least failing components in the environment and replacing them more often leads to other problem than actually resolving the original issue.

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Config Guide, Troubleshooting , , ,

FOS 8.2.0 – The first Broadcom FOS release.

With the transition to Broadcom the Brocade entity now operating under that flag has release it’s first major release 8.2.0.

The release notes show a somewhat strange title: “Fabric OS v8.2.0 for Brocade SAN Product Family“. As if FOS ever was intended to run on any other platform than SAN switches ?!?!?!… Weird..

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Brocade, Storage Networking , , ,

Brocade is no more

Exactly 20 years ago I installed my first Fibre Channel switch. It was from a startup company founded by Kumar Malavalli, Paul Bonderson and Seth Neiman who wanted to dive into the storage networking business based on a protocol developed by one of my long term mentors and the god-father of Fibre-Channel Horst Truestedt together with a bunch of highly skilled engineers.

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Brocade, General Info ,

Brocade Network Advisor vulnerable to SWEET32

OK, OK, don’t panic. In 99.999% of all cases you’re BNA management system is well dug deep inside the datacenter’s behind a fair few layers of firewalls, switch ACL’s and other physical or non-physical borders so bad dudes being able to exploit the vulnerability is relatively unlikely. Just in the event you still want to prevent  from even being remotely possible here is a procedure to remove the underlying issue as well as being able to remove some older, less-secure, protocols.

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Brocade Technical, Config Guide, Troubleshooting , , , ,

Hitachi Va….. what???

VANTARA. Hitachi Vantara. Yes, took me a while to get used to it as well after almost 15 years at HDS but I must say reading all the internal and external communications and overall business and technical transformation gets me more excited by the day.

HDS, Pentaho and Hitachi Insight Group are combined into a new company focussing on IoT, Analytics and helping customers obtain the maximum use and benefit out of their operational technologies via bullet proof IT from HDS.

Two months ago I had solar panels installed. Living in the Australian Sunshine Coast Hinterland I thought I’d let the name and location do some work for me and as a positive side-effect bring my power bills down as well. In addition to that I’ll prevent a few tonnes of CO2 emissions by not having the power companies burn black rock. The challenge is however to make the best use out of the solar installation. As I did not opt for a battery installation (simply too much money and the ROI makes it currently not worth it) the panels deliver between 4 and 5KWh on average depending on a few factors like cloud overcast, angle of the sun, shade of trees etc.

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General Info, Linux , , , ,

Data Corruption in Storage Area Networks

If there is one thing that gets people relatively annoyed is that their data is not available for a certain amount of time. You can’t get to your sales data, orders cannot be fulfilled, your tracking and tracing options for your goods on their way to your customers does not show up etc. That makes you really crunching your teeth whilst waiting for this stuff to come back. Take that feeling into your head and extrapolate it to the point you start to realize this will not return, ever…….got it? That is when data-corruption has made its mark.

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Config Guide, Fibre Channel, Troubleshooting , , , ,