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In the world of enterprise networking, Border Gateway Protocol (BGP) plays a critical role in ensuring scalable and reliable routing between autonomous systems. Whether you’re building a lab, preparing for certifications, or deploying BGP in a production environment, understanding how to configure and optimize BGP is essential. In this post, we’ll walk through a simple yet insightful…

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  Cisco ACI – Port Channel (eth1/4 & eth1/5) Trunk Configuration for VLAN 420 – Complete Guide In modern data center architectures, Cisco ACI (Application Centric Infrastructure) plays a vital role in automating and simplifying complex network configurations. One such common scenario is setting up a Port Channel trunk to carry specific VLAN traffic—like VLAN…

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🧩 Understanding the Limitation: Single EPG, Single Port, Single VLAN in Cisco ACI In Cisco ACI, static port binding is a powerful method to associate specific leaf switch ports to End Point Groups (EPGs) using VLAN encapsulation. However, there’s a key design limitation to be aware of: ✅ One static port binding supports only one EPG with one…

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  🏗️ Cisco ACI – How to Onboard a New Leaf Switch (Step-by-Step) ✅ Prerequisites Before onboarding a new leaf, make sure: ✔️ Cisco ACI fabric is already deployed and operational. ✔️ APIC(s) are reachable and healthy. ✔️ New leaf switch is physically installed in rack and powered off. ✔️ Supported transceivers and uplink cables…

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 Cisco ACI Static EPG Configuration for VLAN 420 – Step-by-Step Deployment Guide  In modern data center architectures, Cisco Application Centric Infrastructure (ACI) provides a scalable, policy-driven approach to network automation. One of the core elements of ACI is the Endpoint Group (EPG)—which simplifies the segmentation and application of network policies. This blog post walks you…

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 In Cisco ACI (Application Centric Infrastructure), an Application Profile is a logical container that defines the structure of an application in terms of endpoint groups (EPGs) and their policies. It is one of the key components of Cisco ACI’s policy-driven model and is used to group together the various parts of an application that communicate…

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 Error Explanation: The error message “Failed to form relation to MO qoscustom-default of class qosCustomPol in context” occurs when there is no QoS policy named qoscustom-default present in the system. Resolution Steps: To clear this alarm: Navigate to: Tenants → User Tenants → Policies → Custom QoS Create a new, empty policy with the name…

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  Comparison of Leaf Interfaces vs Spine Interfaces in Cisco ACI In Cisco ACI, under Fabric > Access Policies > Interfaces, administrators configure how switches connect to endpoints and each other. This section is divided into Leaf Interfaces and Spine Interfaces, each serving distinct roles in the ACI fabric. Understanding the differences between these interface…

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  Understanding Domain Types in Cisco ACI Cisco ACI (Application Centric Infrastructure) provides a flexible and scalable network architecture. One of the key components in ACI is the concept of domains, which define how endpoints and external networks interact with the fabric. In this blog, we will explore four important domain types in Cisco ACI:…

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  Understanding VLAN Pool Roles in Cisco ACI: Internal vs External or On-the-Wire In Cisco ACI, VLAN pools are used to define ranges of VLAN IDs that can be assigned to endpoints. Each VLAN range must be assigned a role, which determines how the VLANs are used within the fabric. There are two primary roles:…

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