Tuesday, 28 April 2026

ThousandEyes Firewall Requirements: Agent to Dashboard Ports and Rules

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  ThousandEyes uses a cloud‑hosted dashboard and agent‑initiated communication model . All communication between the ThousandEyes Agent and...

Leaf Node ID Swap in Cisco ACI: Risks, Precautions, and Steps

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Cisco ACI Leaf Node ID Swap Steps When Leaves Are Part of vPC Step 0 – Preconditions Confirm maintenance window is approved. Ensure alternat...

How to Decommission a Leaf Switch in Cisco ACI Fabric (Step‑by‑Step Guide)

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  Decommissioning a leaf switch in a Cisco ACI fabric is a high‑impact operational activity . Doing it correctly avoids outages, policy cor...
Sunday, 26 April 2026

IDS vs IPS vs Firewall: Differences, Use Cases, and Interview Questions, Cisco ACI Interview Questions

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  IDS vs IPS vs Firewall Firewall, IDS, and IPS are all security controls, but they serve different purposes and operate at different level...

Management vs LOM Interface in Firewalls: Differences, Use Cases & Best Practices

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In enterprise firewalls and network appliances, you will often notice two special interfaces that are not used for normal data traffic: the...

Cisco ip host Command Explained: Uppercase vs Lowercase Hostnames

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In Cisco networking, engineers frequently use the ip host command to map hostnames to IP addresses locally on routers and switches. This is...

Cisco ACI “Unknown” Leaf State Explained: Certificates, LLDP, Software, and Hardware Issues

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   In a Cisco ACI fabric, one of the most frustrating issues during initial fabric bring‑up, expansion, or node replacement is seeing a leaf...