Author Archives: RedNectar Chris Welsh

About RedNectar Chris Welsh

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

ACI Inband Mangagment Route Leaking Kludge

When I was challenged with this: Hi @RedNectar , Right now I have a simple contract that allows SSH only: Scope set to global. TCP dst 22. “Both directions” and “reverse port filters” enabled. This contract is provided by the inband EPG … Continue reading

Posted in ACI, aci inband management, ACI inband management tutorials, ACI Tutorial, Cisco | Tagged , , , | 1 Comment

Understanding Scope Of Prefixes in L3 Out External EPG in ACI —

Excellent post on unofficialaciguide – hightly recommended. In ACI the external Routing Peer to the router is done through border leaves with a object called L3Out. L3Out has an object in it called the L3Out InstP also known as the … Continue reading

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Validating IP Address Entries in Excel

You will learn how IP addresses and subnet mask validation is done, plus a few other IP address maniplating tricks in Excel. Continue reading

Posted in GNS3 WorkBench | Tagged , , , , | 1 Comment

Seven things to know to make Hyperflex go – Cisco HyperFlex Best Practices

Creating a Datastore in Hyperflex Connect is easy, Creating a Datastore in vCenter is messy, When creating HXDP Snapshots in vCenter you need to be careful. There are some things that you need to do differently, and some you should do differently. Here are Seven things to know to make Hyperflex go. Continue reading

Posted in Best Preactices, Cisco, Data Center, Data Centre, ESXi, Hyperflex, VMware | Tagged , , , | 2 Comments

MS Community Robot Finds Word Tables Offensive

I posted this question on the Micsoft Community board and in the course of the following discussion, I posted this picture of a MS Table with the Language incorrectly set. But suddenly, it was removed from my discussion.  Replaced by … Continue reading

Posted in Microsoft, opinion, rant

RedNectar’s Hyperflex Pre-Install Checklist (Updated)

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 … Continue reading

Posted in Cisco, Hyperflex, UCS, VLANs | Tagged | 1 Comment

Resolution Immediacy and Deployment Immediacy – ACI Master Class

When configuring ACI, have you ever wondered what those Resolution Immediacy options [Immediate | On Demand | Pre-provision] and the Deployment Immediacy options [Immediate | On Demand] do? Continue reading

Posted in Access Policy Chain, ACI, ACI Tutorial, Cisco, Master Class, Nexus 9000 | Tagged , , ,