Author Archives: RedNectar Chris Welsh

About RedNectar Chris Welsh

Professional IT Instructor. All things TCP/IP, Cisco or VoIP

ARP Gleaning – ACI Master Class

The purpose of these Gleaning ARPs is simply to “tickle” the target station into sending a packet – not because the gateway needs the MAC address of the target! Continue reading

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Posted in ACI, ACI Tutorial, Cisco, Master Class | Tagged , , , | Leave a comment

An Epyc new addition to the UCS Family!

Originally posted on UCSguru.com:
? Back in February of this year, when I read an article in The Register, announcing that Raghu Nambiar, the then chief technology officer for UCS servers had joined AMD. I didn’t think too much of…

Posted in GNS3 WorkBench | Leave a comment

Backup Plan

Found this in a hotel tonight. Always good to have a backup plan

Posted in GNS3 WorkBench | Tagged | Leave a comment

Why Easter doesn’t it fall at different times in different time zones

This year for example, tonight’s full moon occurs after midnight in places between the International date line and the UTC+11 time zone. So according to the formula, Kiwi kids should have to wait another week before breaking open those chocolate eggs. Continue reading

Posted in blog, opinion

CSMA/CD and full duplex for wireless? It could be coming

The problem with existing wireless communications is that once a device starts transmitting, it doesn’t know if another device has transmitted at the same time until it has finished transmitting. This may be the solution to evercome that Continue reading

Posted in blog, opinion, wifi, wireless network | Tagged ,

Why have WordPress made it soooo hard to follow someone?

 I won’t start a tirade of things you STILL can’t do on WP, but I am going to have a whinge about one feature you have obscured. Continue reading

Posted in opinion, rant, wordpress | Tagged | 2 Comments

RedNectar’s HX Pre-Install Checklist

  Completing Cisco’s Pre-installation Checklist for Cisco HX Data Platform will capture all the information you need, but not necessarily in the order you need it, and for a single site only.  So, I decided to write a version that gets the … Continue reading

Posted in Cisco, Data Center, Data Centre, Hyperflex, UCS | Tagged , , ,