An engineer needs to design a disaster recovery solution for a Cisco ACI multisite network that must provide seamless IP addressing across sites and support Layer 2 adjacency. Which two components sho

Question

Options

• Aa stretched bridge domain and a local subnet
• Ba localized bridge domain, a subnet, and an endpoint group
• Ca localized Layer 2 broadcast domain
• Dlocalized Layer 2 broadcast flooding
• Ea stretched bridge domain, a subnet, and an endpoint group

• A
  7% (3)
• B
  9% (4)
• C
  2% (1)
• D
  82% (37)

Explanation

To achieve seamless IP addressing across sites, the bridge domain, subnet, and endpoint group (EPG) must be stretched. This allows endpoints in different sites to be in the same Layer 2 and IP subnet, enabling VM mobility and application continuity. However, full Layer 2 broadcast flooding across sites is not recommended for scalability and network stability reasons. Therefore, Cisco ACI Multi-Site uses localized Layer 2 broadcast flooding, where broadcast, unknown unicast, and multicast (BUM) traffic is flooded only locally within each site, minimizing inter-site broadcast traffic and reducing risk of loops. This combination supports maintaining Layer 2 adjacency and consistent IP addressing between sites with efficient broadcast handling.

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