Cisco ACI: Multi-Site Stretched Layer 2 (Flooding)
Cisco ACI(Cisco Application Centric Infrastructure)
Multi-Site Stretched Layer 2 (Flooding)
What is Cisco ACI ?
Cisco Application Centric Infrastructure (ACI) is a Next generation SDN solution and is designed for data centers spine-leaf architecture for the policy-driven solution. Cisco ACI provides application agility and data center automation with simplified operations.
What is Cisco ACI Multisite ?
Cisco ACI Multisite that enables several data centers to be linked together and managed as a single entity. Administrators are able to set up, monitor, and control network rules, application profiles, and other network resources across numerous sites using Cisco ACI Multisite from a single central console.
In managing multi-site network settings, this offers a high degree of consistency, automation, and orchestration, assisting enterprises in enhancing network agility, lowering operational complexity, and boosting efficiency.
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| Fig 1.1-Cisco ACI Multisite |
Multi-Site Stretched Layer 2 (Flooding)
The multi-Site design provides traditional Layer 2 stretching of bridge domains across sites, including the capability to flood Layer 2 BUM frames.
The need to flood BUM traffic is driven by specific requirements such as application clustering (which traditionally calls for the use of Layer 2 multicast communication between different application cluster nodes) or support for live (hot) migration (which requires Layer 2 Gratuitous ARP [GARP] and Reverse ARP [RARP] frames to be flooded in the Layer 2 domain of the migrating endpoint).
One advantage offered by the Multi-Site design with this configuration is the capability to tightly control which bridge domains are extended and which are kept local.
The Cisco ACI Multi-Site policy manager in fact allows differentiating the flooding behavior on a per–bridge domain level, which is useful in a real-life scenario in which the flooding behavior must be supported only in a subset of the stretched bridge domains.
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