Load Balancing Comparison Matrix

Updated by Chris Little on Apr 24, 2018
Article Code: kb/4


CenturyLink Cloud offers customers a wide range of load balancing solutions in our product catalog. Customers who wish to quickly review the choices along with features and capabilities can use the comparison matrix below.

Comparison Matrix

Feature LBaaS Citrix VPX4
Control Integration1 Yes No No
High Availability Yes Optional Optional
Mode/Port HTTP
Any Any
Method Round Robin6
Least Connection6
URL Hash6
Listing Varies by
Persistence SourceIP Listing Varies by
Health Checks Yes Yes Yes
SSL Offloading No Yes Yes
WAF No Optional Optional
Global Server Load Balancing No Optional Optional
GeoIP Filtering No Yes Yes
SLA2 Yes Limited Limited
Support3 Yes Limited Limited
Lifecycle Management7 Day 0
Day 2
Day N
Day 0 Day 0
Locations VA1
Any Any
OSI Model5 Layer 4 Layer 4
Layer 7
Layer 4
Layer 7

1: Control Integration at a minimum allows a customer to implement the service on-demand, operate it via self-service in the UX (or using API) with a pay as you go model.

2: SLA is defined as an agreement between CenturyLink and the customer to honor service availability for load balancing specific services via a master service agreement. Limited SLA's include Virtual Machine availability only.

3: Support is defined as an agreement between CenturyLink and the customer to provide technical support and incident management for the load balancing service. Tracking a Dedicated Load Balancer license expiration date is performed by the customer, please reference our License Management Article. Limited Support provides customer service engineers to confirm the infrastructure state and virtual machine state. Customers are responsible for all Day 1, 2 and N operational support.

4: CenturyLink offers various pricing models for the Citrix VPX virtual appliance based on performance and availability needs. Customers can elect to upgrade edition and availability configurations at any time.

5: Layer 4 is related to fourth layer of the OSI model: transport level. For example: TCP and UDP protocols are transport level. Layer 7 is related to seventh layer of the OSI model: application level. For example: HTTP, FTP, SMTP, DNS protocols are application level.

6: All algorithms support "weight" concept. The "weight" parameter is used to adjust the server's weight relative to other servers. All servers will receive a load proportional to their weight relative to the sum of all weights, so the higher the weight, the higher the load.

7: CenturyLink provides lifecycle management based on Day 0 (Install: Import, IP Device), 1 (Configure, Operate), 2 (Optimize, Compliance) and N (Upgrade, Patching) methodologies. Customers are responsible for any operational support that is not included in the base offering.

Lifecycle Management

Additional Details

The links below provide supporting material that can assist a customer with further evaluating the proper load balancing service for their needs.