Author Archives: RedNectar Chris Welsh

About RedNectar Chris Welsh

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

Cisco has re-vamped their ACI Docs pages. Here’s what I think.

Posted on 2021/06/17 by RedNectar Chris Welsh

What Cisco has done is given us not just a prettier version, but in many cases more useable too Continue reading →

Posted in ACI | Comments Off on Cisco has re-vamped their ACI Docs pages. Here’s what I think.

ACI and the HyperFlex Hiccup Cure

Posted on 2021/05/14 by RedNectar Chris Welsh

In this post I’ll show you how I reduced that failover time for HyperFlex Connect to about one minute. Continue reading →

Posted in ACI, Cisco, Hyperflex | Comments Off on ACI and the HyperFlex Hiccup Cure

ACI and the HyperFlex Hiccup

Posted on 2021/04/27 by RedNectar Chris Welsh

the problem relates to how Cisco HyperFlex uses a floating IP address across multiple Storage Controller VM MAC addresses, and how ACI maintains the IP to MAC address table Continue reading →

Posted in ACI, Best Preactices, Cisco, GNS3 WorkBench, Hyperflex | Tagged , , | 3 Comments

Rednectar’s Rules for writing Lab Guides

Posted on 2021/04/05 by RedNectar Chris Welsh

I wrote these as a guide for lab writers whose work I get to review and are in the context of writing lab guides using the frustrating wordprocessor known as Microsoft Word. It is meant to be a set of … Continue reading →

Posted in Microsoft, Microsoft Word, MS Word Tips | Tagged , | Comments Off on Rednectar’s Rules for writing Lab Guides

How to schedule Hyperflex Scheduled Snapshots

Posted on 2020/12/11 by RedNectar Chris Welsh

When upgrade your Hyperflex plugin, you’ll find that the Schedule Snapshots option has GONE Continue reading →

Posted in GNS3 WorkBench | Comments Off on How to schedule Hyperflex Scheduled Snapshots

New APIC ACI 5.1 firmware – Cisco have gone colloquial

Posted on 2020/10/25 by RedNectar Chris Welsh

This is an absolute affirmation that Cisco only cares about North American users Continue reading →

Posted in ACI, Cisco, rant | Tagged , , | 1 Comment

Making the most of ACI when routing between tenants via a Firewall

Posted on 2020/10/06 by RedNectar Chris Welsh

I’ll show you how you can enhance your ACI migration by using some ACI features that are practically impossible to implement on L3 Firewalls Continue reading →

Posted in ACI, ACI Tutorial, Cisco, configuration tutorial, Data Center, Data Centre | Comments Off on Making the most of ACI when routing between tenants via a Firewall

ACI Version mismatch Alert. Don’t use v5 on APIC and v14 on Leaves

Posted on 2020/09/05 by RedNectar Chris Welsh

If you are stuck with some first-generation switches in your ACI fabric, you might be tempted to upgrade your APIC to version 5.x – maybe even attempt to upgrade your leaf switches to the companion v15.x. Let me tell you why you don’t want to do that. Continue reading →

Posted in ACI, Cisco, Data Center, Data Centre | Comments Off on ACI Version mismatch Alert. Don’t use v5 on APIC and v14 on Leaves

Protected: You won’t beleive how secure Cisco is!

Posted on 2020/08/19 by RedNectar Chris Welsh

There is no excerpt because this is a protected post.

Posted in Cisco, rant | Comments Off on Protected: You won’t beleive how secure Cisco is!

RedNectar’s Guide for writing Exam Questions

Posted on 2020/08/08 by RedNectar Chris Welsh

I feel your pain. You are sitting another [insert name of favourite vendor here] exam, and you come across a question that is just not written clearly, where the examiner has not made the question clear. And so, you begin … Continue reading →

Posted in Cisco, rant | Comments Off on RedNectar’s Guide for writing Exam Questions