In VRRP HSB (Hot Standby Backup) mode for WLAN deployments (typically between ACs or access controllers), backup of critical data ensures fast failover and minimal service disruption.
A. Real-time backup – Supported. Configuration and session information are synchronized in real-time between the active and standby ACs.
B. Scheduled synchronization – Not supported . HSB requires instant synchronization, not based on a scheduled time.
C. Batch backup – Supported. Some types of less time-sensitive data (e.g., logs or counters) may be backed up in batches.
D. Cloud backup – Not part of HSB functionality . Cloud backup is a separate mechanism, typically used for archival purposes, not real-time failover.
Reference from Huawei HCIP-Datacom-Core Technology Study Guide:
“VRRP HSB mode supports real-time and batch backup between ACs to protect WLAN services. Scheduled and cloud backups are not part of HSB functionality.”
(Chapter: WLAN Reliability – Section: AC Redundancy and HSB Mechanism)
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