Which of the following topologies are supported by Huawei 3DC (Three-Data-Center) DR solution?

Huawei’s 3DC (Three-Data-Center) solution is designed for high-level business continuity, typically involving a local HA site and a remote DR site. The documentation supports three main topological configurations to meet different reliability and performance needs:

Cascading Network (Option B):Site A (Production) replicates to Site B (Local DR), and Site B then replicates to Site C (Remote DR). This reduces the pressure on the production site (Site A) as it only manages one replication link.

Parallel Network (Option C):Site A replicates directly to both Site B and Site C simultaneously. This provides better protection for the data at Site C, but increases the load and bandwidth requirements on Site A.

DR Star Network (Option A):This is a specific variant of the multi-site protection architecture used in Huawei'sHyperMetro + Remote Replicationscenarios. It typically combines an active-active setup between Site A and B with an asynchronous link to Site C, ensuring that even if two sites fail, the third contains a survivable copy of the data.