Bürgerbus – ein Indiz postkapitalistischer Schizophrenie

Vor einiger Zeit auf dem Weg zum Arbeit ist mir mal wieder ein Bürgerbus aufgefallen. Grundsätzlich ein Indiz mitbürgerlichen Engagements, also gesellschaftlich und ehrenamtlich eine großartige Errungenschaft getragen von sozialen Mitmenschen und unterstützt von den Gemeinden, letztenendes der “kleinen” öffentlichen Hand und dem lokalen Stuerzahler.

So weit so positiv.

Denkt man nur einen Moment drüber nach, geht einem einmal mehr das sprichwörtliche Messer im Sack auf … Continue reading

How To Configure Multiple VLANs on one Synology Bond

Some times you may need perhaps more than one network at home connected to your Synology NAS. You are a geek and want to do srange VMWare things or you simply want your kids friends not to find the private family pictures.

Accessrights are one thing, hard network separation probably something entirely different. Even id you don’t want to separate traffic but want to support storage in different subnets probably you don’t want your homeuse- router do handle storage traffic. At least it is very smart to avoid that.

Conceptional this may be solved by interface overloading on the network interface of the storage device. You may have different network cards, to separatre traffic, but why would Continue reading

How To build a 19″ Server Rack

Every serious consultant and technichian walks through this phase of having his private test environment and wants to bring whatever environment to live. In the former days this was occasionally heavy iron, piling up to some extend and everybody had somehow to handle the hardware.

Today virtualisation and the meltdown in memory pricing helps. Entire companies may be simulated virtually in little more than an PC. What doesn’t change is communications and given the fact that nice replication or virtulisation technologies sometimes shall work over a far stretched wide area connection. So the today home lab looks first compressed in a Continue reading

25th Anniversary of HAHN Automation

Last weekend, bether from thursday to saturday, my employer held his 25th anniversary. now you may consider myself as an overachiver, blogging on my private website about that. But the enourmous feeback we got and the two remarkable key notes I heared, made me reconsider this, and I want to share some of these impressions.

Besides the keynotes of course there had been speeches and buffets and polititians speaking … you name it. On the other hand we partnered with some of our suppliers to give some state of the art impression on robotics, such as Festo with the Butterflies or Schunk with the bionic hand.

Besides the current state, the audience was inspired about the future of robotics first in the speech of Dr. Hubert Zitt, a lecturer at the FH Kaiserslautern/Zweibrücken who relates quite frequently the science in science fiction to the real world and current technical Continue reading

How To Configure IRF on HPE FF5700

Approaching a certain quality level of switching and routing, high availability evolves to be an obligation. In these terms, according to the different OSI service layers, there are many high availability protocols, securing the according network services. The Spanning Tree family as STP, RSTP, MSTP, PVST, protocols for link aggregation as LACP and layer three routing redundancy services like VRRP.

These protocols have the advantage, being vendor independent standards and presume to be interoperable. But either design gets complex, interoperability keeps its caveats or ressources are simply disabled and take over in failiure. Thats not exactly performance driving.

So vendors created stacks – which failed otherwise, or they started to create systems of higher complexity which proprietary created load sharing high availability clusters in the Continue reading

HowTo activate SNMP on vSphere 6.0 hosts

Monitoring ESXi with an standard open source monitoring tool usually requires SNMP. Searching for SNMP in the vCenter configuration context this simply allows you to start the service – but not exactly leads to success in the first place. Probably you get an error.

You check in the security profiles and find the service stopped although it is configured to start with the host. Manual start delivers an “ooops”.

Looking for an clickable configuration context did not lead to an solution I was aware of. Continue reading