Discover the optimal design for a disaster recovery solution in a Cisco ACI Multi-Site network that ensures seamless IP addressing, high resilience, and Layer 2 adjacency across sites.
Table of Contents
Question
An engineer must design a disaster recovery solution for a Cisco ACI Multi-Site network. One requirement is that the applications must have seamless IP addressing across sites. The solution must also be highly resilient and support Layer 2 adjacency. Which design meets these requirements?
A. localized bridge domain, subnet, and EPG
stretched Layer 2 broadcast domain
B. stretched bridge domain with local subnet
stretched Layer 2 broadcast domain
C. localized bridge domain with local subnet
localized Layer 2 broadcast flooding
D. stretched bridge domain, subnet, and EPG
localized Layer 2 broadcast flooding
Answer
B. stretched bridge domain with local subnet
stretched Layer 2 broadcast domain
Explanation
A stretched bridge domain allows Layer 2 extension across multiple sites, enabling a single Layer 2 broadcast domain spanning multiple data centers. This provides seamless IP addressing and Layer 2 adjacency for applications across sites. Local subnets within the stretched bridge domain ensure optimal traffic forwarding and resilience, as traffic is routed locally within each site when communicating between endpoints in the same site. The stretched Layer 2 broadcast domain facilitates communication between endpoints across sites while maintaining high availability and resilience.
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