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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 (Legacy) |
LBaaS | Citrix VPX4 (Dedicated) |
Marketplace |
|---|---|---|---|---|
| Control Integration1 | Yes | Yes | No | No |
| High Availability | Yes | Yes | Optional | Optional |
| Mode/Port | TCP/80 TCP/443 |
HTTP TCP/Any |
Any | Any |
| Method | Round Robin Least Connection |
Round Robin6 Least Connection6 SourceIP6 URL Hash6 |
Listing | Varies by Vendor |
| Persistence | SourceIP | SourceIP | Listing | Varies by Vendor |
| Health Checks | No | Yes | Yes | Yes |
| SSL Offloading | No | No | Yes | Yes |
| WAF | No | No | Optional | Optional |
| Global Server Load Balancing | No | No | Optional | Optional |
| GeoIP Filtering | No | No | Yes | Yes |
| SLA2 | Yes | Yes | Limited | Limited |
| Support3 | Yes | Yes | Limited | Limited |
| Lifecycle Management7 | Day 0 Day 2 Day N |
Day 0 Day 2 Day N |
Day 0 | Day 0 |
| Locations | CA1 CA2 GB1 VA2 WA1 |
VA1 UC1 IL1 NY1 CA3 GB3 SG1 DE1 DE3 AU1 |
Any | Any |
| OSI Model5 | Layer 4 | 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.
Additional Details
The links below provide supporting material that can assist a customer with further evaluating the proper load balancing service for their needs.
