Scenario: A Citrix ADC MPX is using one of four available 10G ports. A Citrix Administrator discovers a traffic bottleneck at the Citrix ADC. What can the administrator do to increase bandwidth on the Citrix ADC?

The most direct and efficient method to increase bandwidth on a Citrix ADC with unused physical ports is to implement Link Aggregation. By connecting another 10G port to the switch and configuring a Link Aggregation (LA) channel using Link Aggregation Control Protocol (LACP), the administrator bundles multiple physical links into a single, logical high-bandwidth channel. This directly addresses the traffic bottleneck by increasing the aggregate throughput available to the appliance. This standard practice also provides link redundancy, as traffic can fail over to the remaining active links in the channel if one link fails.

A. Purchasing another appliance is a costly and complex scalability solution, not the appropriate first step to resolve a bottleneck on an existing device with available physical capacity.
B. Simply plugging in another port without configuration like LACP will not aggregate bandwidth and can create network loops or other connectivity issues.
C. Configuring a VLAN is for logical network segmentation. It separates broadcast domains but does not combine the bandwidth of multiple physical ports into a single logical channel.

1. Citrix ADC 13.1 Product Documentation

"Configuring Link Aggregation": "You can increase the communication throughput of the Citrix ADC appliance by logically grouping interfaces to form a Link Aggregation (LA) channel. The LA channel has the throughput of the sum of the interfaces in the channel... The Citrix ADC appliance supports the IEEE 802.3ad Link Aggregation Control Protocol (LACP)."

Source: Citrix Product Documentation. Section: Networking > Interfaces > Link Aggregation.

2. Citrix ADC 13.1 Product Documentation

"Link Aggregation": "Link aggregation combines two or more active network interfaces into a single logical interface

providing increased throughput and fault tolerance."

Source: Citrix Product Documentation. Section: Networking > High Availability > Understanding High Availability > Link Aggregation.

3. Citrix ADC Networking - A Detailed Guide

"Link Aggregation (LAG)": "Link Aggregation (LAG) is a method of combining multiple network connections in parallel in order to increase throughput beyond what a single connection could sustain

and to provide redundancy in case one of the links should fail. On a Citrix ADC

this is achieved by creating a channel."

Source: Citrix Tech Zone

CTX229699. Section: Link Aggregation (LAG).