Short Blogs

VXLAN EVPN vPC Attached External / L4-L7 Configuration – BGP

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Belete Ageze 2xCCIE | CCDE Overview In a VXLAN EVPN fabric, establishing external routed connectivity and integrating Layer 4 to Layer 7 (L4-L7) services are crucial for ensuring network security and optimizing traffic flow. Typically, external routed connections are linked to specific leaf switches known as border leaf switches. These switches handle traffic entering and […]

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ACI Application Centric Deployment (ACD) and Subnet Sharing with Route Leaking

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1. Overview In Cisco ACI, a powerful feature called route leaking enables applications and services to communicate seamlessly across Virtual Routing and Forwarding (VRF) instances. This allows for efficient data flow within the network infrastructure, even when applications reside in separate VRFs for security or isolation purposes. Route leaking achieves this by sharing routing information

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Cisco VxLAN EVPN Route Leaking – 2 (NDFC)

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Overview This blog is a continuation of ‘Cisco VxLAN EVPN Route Leaking – 1’ – https://deliabtech.com/data-center/cisco-vxlan-evpn-route-leaking-1/ . The focus is on configuring route leaking through the use of Nexus Dashboard Fabric Controller (NDFC). Topology Goal – Green vrf imports Blue & Orange vrfs and Blue & Orange vrfs import Green vrf Assumptions Configuration 1. log

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Underlay Multicast Routing for VxLAN BUM Traffic

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Belete Ageze – 2xCCIE | CCDE Overview While Cisco VxLAN leverages BGP EVPN for the control plane, it requires mechanisms to manage Broadcast, Unknown Unicast, and Multicast (BUM) traffic within the VxLAN fabric. VxLAN fabrics typically rely on multicast replication in the underlay network to efficiently forward BUM traffic. Although ingress replication serves as an

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Cisco iCAM Monitor

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Chord Diagram

Overview Cisco iCAM – intelligent CAM (Content Addressable Memory) Analytics and Machine learning is a feature available on Cisco Nexus switches. It provides functionalities focused on resource monitoring and analysis for various switch functions and features like; Cisco iCAM Benefits iCAM provides resource monitoring and analytics for different functions and features on supported switches. It

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ACI Route Leaking – Shared Services (Network Centric Deployment)

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Cisco ACI (Application Centric Infrastructure) uses route leaking technique to allow routes to be shared between VRFs in the same tenant or in different tenants.

Route leaking reduces routing devices involved in a multiple VRF environment and improve network performance by avoiding traffic to use outside path for inter-VRF communication. But accidental route leaking can happen if manual configuration is used in a scaled environment which may increase the complexity of network operation and troubleshooting.

ACI route leaking is a powerful feature and it’s critical to understand the pros and cons during the design phase to get the most out of it based on the unique requirements of the specific deployment.

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ACI Multi-site Object Naming Consideration

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Designing ACI multi-site object names should not be an after thought since it has an implication during inter-site communication deployment. When contract with the right scope is applied between site-local EPGs the ACI objects are mirrored on the remote sites. The mirrored objects appear as if they are deployed in each of these sites’ controllers, while only actually being deployed in one of the sites. These mirrored objects are called “shadow” objects and they appear with the same names as the ones that were deployed directly to each site. Because of the shadow objects requirement for inter-site communication between site-local EPGs, this blogs focus on ACI multi-site object naming consideration an engineer need to be aware of.

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ACI Custom EPG Name for Simple and Meaningful Port Group Naming

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An EPG with VMM domain association creates a port group on the APIC managed DVS. The name for the port group defaults to ‘Tenant_name|AP_name|EPG_name’. The name, depending on how the tenant, application profile and EPG are named, may not be simple or meaningful for the VMWare admin. The solution is custom EPG name. An EPG can optionally have a custom name with the VMM domain association. Beginning in release 4.2(3), custom EPG name is used to create a port group with a simple and meaningful name when the default ‘Tenant_name|AP_name|EPG_name’ naming doesn’t meet the need of the VMWare admin’s standard.

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