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Difference Between Cisco ACI Multi-Pod Vs Cisco ACI Multi-Site

Today I am going to talk about the difference between the Cisco ACI Multi-Site and Cisco ACI Multi-Pod deployment. So let me talk about the basic difference between the Cisco ACI Multi-Pod and Cisco ACI Multi-Site. 

Fig 1.1- ACI Multi-Site and Multi-Pod Deployments

Below are the difference as :
  • In Multi-Pod you can have, Full ACI functionality across an entire Multi-Pod fabric while in in Multi-Site you can have Tenants, Applications, VRFs, BDs, Subnets, EPGs (including μSeg), policies stretched across ACI fabrics 
  • Availability Zone: In Multi-Pod, Single availability zone with one APIC cluster for an entire Multi-Pod fabric that provides central point of management while in Multi-Site we have Multiple availability zones.In each fabric with its separate APIC cluster is an availability zone managed by Multi-Site.
  • VM Migration : In Multi-Pod, Live VM migration within and across pods While in Multi-Site, Live VM migration within and across sites (vSphere 6 and above) with support for IP mobility across sites.
  • Redundancy: In Multi-Pod, Redundant nodes, interfaces and devices within a fabric while in Multi-Site, we have adds full site active/active or active/standby deployment with end-to-end policy definition and enforcement.
  • Configuration Changes: In Multi-Pod, the APIC cluster pushes configuration changes into the entire Multi-Pod fabric while preserving tenant isolation while in Multi-Site it can selectively push configuration changes to specified sites enabling staging/validating while preserving tenant isolation 
  • Node Count: In Multi-Pod, Node Count Scales according to the limits of a single fabric while in Multi-Site the node count scales according to the number of sites connected.
  • In Multi-Pod, Pod-Interconnects have typically uses lower latency IP network between pods while in Multi-Site, it can deploy policies in fabrics across continents.
  • Authentication & RBAC : In Multi-pod, authentication and RBAC rules enforced within all pods of the fabric while in Multi-Site authentication and RBAC rules enforced across sites.
  • L4-L7 Services : In Multi-Pod, L4-L7 services stitching across pods while In Multi-Site, Site local L4-L7 services stitching