Christopher Wise
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Thoughts on networking, automation, and IT

Battle-Tested Cookbook: Ansible for Cisco Leaf-Spine Changes with Kubernetes CNI Validation

January 31, 2026

Datacenter networking changes in a leaf-spine fabric are rarely “just a switch config push.” The blast radius includes routing symmetry, ECMP behavior, MTU consistency, and Kubernetes node-to-node paths that your CNI ass

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How I Automated BGP Provisioning for 100+ ISP Customers with NetBox, Ansible and Python

January 31, 2026

Provisioning **bgp** for ISP customers sounds repetitive until it isn’t: every customer wants slightly different routing policy, addressing, SLAs, security posture, and turn-up timeline. At 100+ customers, “copy/paste an

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Real-world troubleshooting: BGP route flaps after adding Kubernetes egress in ISP networks

January 30, 2026

Adding Kubernetes egress (NAT, egress gateway, or pod-routed prefixes) into an ISP network can unintentionally perturb **bgp** behavior: routes start flapping, attributes change across updates, and traffic oscillates bet

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How to automate BGP prefix-list imports from NetBox into Cisco routers for datacenter networking using Ansible and Python

January 30, 2026

Automating BGP prefix-lists from **netbox** turns “tribal knowledge + spreadsheets” into a controlled, auditable workflow. In datacenters, prefix-lists are effectively policy: what can be advertised, what can be accepted

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Checklist: Automating Kubernetes datacenter networking (EVPN‑VXLAN) on Cisco NX‑OS with Ansible

January 29, 2026

Automating an EVPN‑VXLAN fabric for **kubernetes** is less about “pushing config” and more about enforcing repeatable decisions: MTU, underlay routing, VXLAN replication mode, VRF/VLAN mapping, and how services (LoadBala

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© 2026 Christopher Wise. All rights reserved.

IT Professional | Cisco Networking & Automation Specialist