The Policy Driven Data Center with ACI: Architecture, Concepts, and Methodology (Networking Technology) by Lucien Avramov & Maurizio Portolani

Author:Lucien Avramov & Maurizio Portolani
Language: eng
Format: mobi
Publisher: Pearson Education
Published: 2014-12-23T17:00:00+00:00

Endpoint Discovery

ACI uses three methods to discover the presence of virtual endpoints. The first method of learning is control plane learning, which is achieved through an out-of-band handshake. vCenter or SCVMM can run a control protocol that is used to communicate with APIC.

The in-band mechanism to discover endpoints is a protocol called OpFlex. OpFlex is a southbound policy protocol that is used not only to relegate policy information but also to propagate information such as endpoint reachability. If OpFlex is not available, ACI also uses CDP and Link Layer Discovery Protocol (LLDP) to map which port a given virtualized server is connected to.

In addition to control protocol–based discovery, ACI also uses data path learning.

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