What does ISNS implement for Alcatel OS 9700 switches?

• A. Single CMM control
• B. Software failover by using two fully operational CMM modules
• C. Automatic OS upgrade on failure
• D. Hot-swappable power supply redundancy

Answer: (B)

This item tests high availability for the OS 9700 by using redundant control modules. ISNS implements software failover by keeping two CMM modules fully operational, so one can take over immediately if the other fails. This means the switch maintains management and control functions without interruption, avoiding a single point of failure.

Having two CMMs in play also allows smoother maintenance and updates, since the standby can assume control with minimal disruption. In contrast, relying on a single CMM would create a risk of downtime if that module fails. Automatic OS upgrades on failure aren’t a true failover mechanism and could introduce downtime, and hot-swappable power supplies concern power redundancy rather than control-plane reliability.