What action increases bandwidth on a Citrix ADC when there is a bottleneck on a single 10G port?

• A. Purchase another Citrix ADC MPX appliance.
• B. Plug another 10G Citrix ADC port into the router.
• C. Add two more 10G Citrix ADC ports to the network and configure VLAN.
• D. Add another 10G Citrix ADC port to the switch, and configure Link Aggregation Control Protocol (LACP).

Answer: (D)

When a single 10G port becomes a bottleneck, the way to increase bandwidth is to bond multiple physical links into one logical link using LACP. By adding another 10G port from the Citrix ADC to the same switch and enabling LACP, you create a single aggregated path (a link-aggregation group) that combines the capacities of both physical links. Traffic is distributed across the two links based on hashing, so you effectively get the sum of their speeds and improved resilience if one link drops.

This requires both the ADC and the switch to participate in LACP, sharing the same port-channel configuration and matching VLAN/MTU settings. Simply adding a second port without bonding won’t provide the combined bandwidth, because the traffic won’t be consistently distributed across the two paths. Connecting an extra port to the router or adding ports with VLANs alone don’t guarantee increased aggregated throughput unless they’re part of a coordinated LACP setup.