To address a saturated data interface on an SDX, which action should the administrator take?

• A. Add a second interface to each Citrix ADC VPX instance
• B. Configure LACP on the SDX for management interface
• C. Configure LACP on the SDX for the data interface
• D. Configure a failover interface set on each Citrix ADC VPX instance

Answer: (C)

When you see data-path saturation on an SDX, the solution is to increase the bandwidth available to the VPX data traffic by combining multiple physical Network Interfaces into one logical link using LACP. Configuring LACP on the SDX for the data interfaces creates a port-channel that aggregates several NICs, distributing the load and providing higher overall throughput. This directly tackles the saturation by expanding the effective bandwidth available to the VPX data paths and improving redundancy. In contrast, configuring LACP on the management interface won't affect user data traffic, and a failover setup on each VPX or simply adding a second interface without aggregation doesn't increase sustained data throughput in the same way.