Brocade Fabric Operating System is divided

No, no. It’s not in conflict with itself. It is now physically split up in multiple codebases each for a specific platform.

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Preventing Information Overload in SAN Management

The standpoint of getting notified when events happen in SAN environments at all costs may need to be reviewed. As many of you know the Broadcom and Cisco switches can customise various thresholds in their respective FOS and NX-OS operating systems.

Brocade uses the MAPS framework which follows a policy based setup.

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Brocade, Uncategorized , , ,

FPIN – The Holy Grail of SAN Stability

As some of you may recall about a decade ago I made a proposal to incorporate more intelligence into the end-devices to be able to better react to changing conditions in fabrics. I called it the “Error Reporting with Integrated Notification” framework (mind the acronym here. :-))

Basically the intention was to have end-devices check for errors along paths which their frames traverse by sending a “query-frame” to the remote device. Each hop along the way could then add its values (errors, counters) to that frame and the remote device would, upon reception of that frame, also add its counters, reverse the SID (Source ID) and DID (Destination ID) and send that same frame back to the original sender. That sender would then be able to make decisions whether to use that same path for subsequent frames or if it would hold of using it temporarily or not at all. Read on.

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Fibre Channel , , , ,

Interesting Flow Vision bug

Ok, truth be told it is not a Flow Vision bug but in FOS 9.0.0 it is flagged as such under defect 653188.

As you know Flow Vision can be configured to monitor certain traffic flows. SCSI commands such as read, write, xfer-rdy,, status etc can be viewed with the flow –show command.

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Brocade Technical, Fibre Channel , ,

Using systemd-resolved to optimise DNS resolution.

When you work from home and are required to use the corporate network you’re often shoved into a dilemma where the VPN configuration that is pushed to your…

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Linux , , , , , ,

Enabling Verbose Logging on Linux with Emulex Host Bus Adapters

Where did my disks go? So no and then you may run into an issue which cannot be explained properly by just looking at the standard events that…

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General Info, Linux, Storage , , , ,

Reducing MFA/2FA requests on cloud apps

Intro Third party authentication and authorisation providers like okta, azure, gcs or aws often have a trusted connection to the tenants. This sometimes allows that authentication requests via…

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General Info, Linux , , ,

NXDOMAIN hijacking and ISP behaviour

Something none storage related. This article at “The Register” triggered me to write this post and explain why I don’t see this behaviour in my household. The trick is to configure DNS-over-HTTPS in your network.

For the non-technical people who read this the title may already be an incentive to not read any further but please bear with me.

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General Info, Linux , , ,

FOS version 9 – Gen 7 Fibre-Channel is here

Yahooo… (No not the company) FOS version 9 is here. The one that starts to support Gen 7 (64/256 Gbit) Fibre Channel. Now, just in case you’re getting excited and want to go clickety..clickety..click..upgrade <<<< hold on!!.

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Brocade, Brocade Technical , , ,

PortFencing – the hard or soft way?

As you can read in my previous articles (here, here and here) having a physical issue on any of you FC links is detrimental to your entire FC infrastructure. Not only does it corrupt frames and primitives but is also resulting in traffic flow issues which may even propagate to other fabrics which even have a so called air-gap. (See here)

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