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  • Vendor interoperability with multiple STP instances

    calendar Apr 17, 2022 · 5 min read · Home Lab Layer 2 Datacenter Networking Spanning-Tree Routing & Switching Studies Design Patterns  ·
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    Spanning Tree is the all-important loop prevention method for Layer 2 topologies and source of ire to network engineers worldwide. Usually IT engineers list the Dunning-Kruger Effect in a negative context, depicting an oblivious junior or an unaware manager, but I like to focus on the opposite end of the curve with …


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  • Cisco Modeling Labs

    calendar Mar 26, 2022 · 3 min read · Linux Home Lab Cisco NX-OS NFV Datacenter Networking Routing & Switching Studies Programmability Design Patterns Network Automation  ·
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    Ever wonder what it would be like to have a platform dedicated to Continuous Improvement / Testing / Labbing? Cisco's put a lot of thought into good ways to do that, and Cisco Modeling Labs(CML) is the latest iteration of their solutions to provide this as a service to enterprises and casual users alike. CML is the …


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  • Why Automate? Reliability Approaches with the VMware NSX-T API

    calendar Nov 24, 2021 · 11 min read · Home Lab Continuous Delivery JSON NSX-T Network Automation  ·
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    Why should an infrastructure engineer leverage REST APIs? I'm sure most IT workers have at least heard of REST APIs, or heard a sales pitch where a vendor insists that while a requested functionality doesn't exist, you could build it yourself by "using the API". Or, participate in discussions where people …


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  • NSX-T Edge Transport Node Packet Captures

    calendar May 2, 2021 · 1 min read · VMWare Home Lab Datacenter Networking NSX-T  ·
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    NSX-T Edge Transport Node Packet Captures NSX-T Edge nodes have a rudimentary packet capture tool built in to the box. It is important to have a built-in tool here, as GENEVE encapsulation will wrap just about everything coming out of a transport node. NSX-T's CLI guide indicates the method for packet captures - from …


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  • VMware NSX Advanced Load Balancer - Overview

    calendar Apr 3, 2021 · 5 min read · eBGP VMWare Home Lab IPv6 Datacenter Networking BGP NSX-T Network Automation  ·
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    Load Balancing is Important Load balancing is an important aspect of network mobility. How is a network useful if you can't move around within it? Cellular networks lose their appeal if you drop connectivity every time you roam between towers Wi-Fi networks are designed to facilitate smaller-scale movements. Imagine if …


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  • Design Pattern: Looking Glasses

    calendar Mar 22, 2021 · 3 min read · eBGP Python FOSS/Linux Network Automation Home Lab IPv6 Datacenter Networking iBGP Routing & Switching Studies BGP Programmability Design Patterns  ·
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    It's probably safe to say that service provider networking is pretty unique. One particular design pattern - Looking Glasses - is extremely useful for complex dynamically routed networks. I'd really like to shift the gatekeeping needle here - networks that are complex enough to benefit from a looking glass should move …


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  • NSX-T Transitive Networking

    calendar Jan 3, 2021 · 6 min read · eBGP VMWare Home Lab IPv6 Network Security Datacenter Networking Spine and Leaf BGP NSX-T  ·
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    One major advantage to NSX-T is that Edge Transport Nodes (ETNs) are transitive Transitivity (Wikipedia) (Consortium GARR) is an extremely important concept in network science, and in computer networking. In simple terms, a network node (any speaker capable of transmitting or receiving on a network) can have the …


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  • Why Automate? Using Pipelines to Develop and Manage Network Configurations

    calendar Dec 31, 2020 · 10 min read · eBGP Home Lab IPv6 Datacenter Networking FOSS/Linux Spine and Leaf Routing & Switching Studies BGP Ansible Jinja Network Automation  ·
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    Continuous Delivery: No Rest for the Wicked Now that we have: A method to generate Desired State Configurations, by defining Declaratively what the device config should be, and combining it with what a device config should have A method to apply configurations automatically, without PuTTY Copy-Pasting We now can …


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  • Why Automate? Ansible Playbooks and Desired State for Network Operating Systems

    calendar Dec 29, 2020 · 7 min read · eBGP Home Lab IPv6 Datacenter Networking FOSS/Linux Spine and Leaf BGP Programmability Ansible Jinja Network Automation  ·
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    Don't Reinvent the Wheel: Ansible Playbooks Writing your own code isn't always the answer Often, communities such as Python will contribute code of substantially higher quality than what you/I can create individually. This is OK. In nearly every case, dyed-in-the-wool traditionalist programmers will consume …


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  • vCenter Upgrade Error: Exception Occurred in install precheck phase

    calendar Dec 20, 2020 · 7 min read · VMWare Home Lab Datacenter Networking  ·
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    Error presented by VAMI Interface Caveat This is definitely bypassing some form of pre-check, please contact VMware support if it's on a production system! Troubleshooting VCSA 7.0 has moved the upgrade process logging to a new location - the log itself is now at /storage/log/vmware/applmgmt/update_microservice.log …


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ENGYAK.co

A blog about IT

Disclaimer

The opinions expressed on this site are my own personal opinions and do not represent my employer’s view in any way.

Recent Posts

  • Automate DNS Zone Generation and Deployment with Ansible and Netbox
  • VM Deployment Pipelines with Proxmox
  • Starting from scratch with Netbox IPAM
  • Manage Linux patching with Ansible and Netbox!
  • Abstracting DNS Record Management with Ansible and Jinja 2
  • Build and Consume Alpine Linux vSphere Images
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  • Internet Load Balancing with pfSense

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