A municipal DR runbook keeps cold VMs offline until failover and requires those VMs to retain the same IP and MAC after moving to the DR hall. Why is Layer-2 stretch a fit?
Select an answer to reveal the explanation.
Short Explanation
Cold VMs that must wake up with the same IP and MAC are the textbook L2-stretch mobility story. Keep the Layer-2 identity continuous across the DR move.
Full Explanation
Disaster-recovery patterns that relocate or activate workloads while preserving IP and MAC addresses benefit from Layer-2 stretch because the L2 identity remains continuous across sites. Layer-3-only DCI would typically force re-addressing or different reachability handling. Use-case fit—not blanket preference—drives L2 stretch selection here.