Configuring Stretched Components
Question
Which two components must be configured as stretched to establish intra-VRF communication between two EPGs that are deployed in different sites and different bridge domains? (Choose two.)
Answers
Explanations
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A. B. C. D. E.DE.
https://www.cisco.com/c/en/us/solutions/collateral/data-center-virtualization/application-centric-infrastructure/white-paper-c11-739609.htmlTo establish intra-VRF communication between two EPGs (End Point Groups) that are deployed in different sites and different bridge domains in Cisco ACI, two components that must be configured as stretched are:
Bridge Domain: A bridge domain is a Layer 2 broadcast domain that exists within a tenant. In Cisco ACI, a bridge domain is stretched when it spans across multiple locations or sites. When a bridge domain is stretched, endpoints in different locations can communicate with each other as if they were in the same Layer 2 network.
EPG (End Point Group): An EPG is a group of endpoints that share the same policy requirements, such as security policies and Quality of Service (QoS) policies. When two EPGs are deployed in different sites and different bridge domains, they cannot communicate with each other unless their respective bridge domains are stretched. Once the bridge domains are stretched, the EPGs can communicate with each other as if they were in the same Layer 2 network.
Therefore, the correct answers to the question are D. Bridge Domain and E. EPG.
The other answer choices are not directly related to establishing intra-VRF communication between EPGs in different sites and bridge domains.
A. Contract: A contract is a policy that defines the communication between EPGs. Contracts are used to enforce policies such as filtering, QoS, and security. Contracts are not required to stretch bridge domains for intra-VRF communication between EPGs in different sites.
B. Tenant: A tenant is a logical container for a group of applications, networks, and services in Cisco ACI. A tenant can contain multiple bridge domains, EPGs, and application profiles. However, stretching a tenant is not required for intra-VRF communication between EPGs in different sites.
C. Application Profile: An application profile is a collection of EPGs and contracts that are used to define the requirements for an application. An application profile is not directly related to stretching bridge domains for intra-VRF communication between EPGs in different sites.
