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Gas and electric company makes paperless power management easy with Citrix NetScaler

Louisville Gas and Electric Company (LG&E), Kentucky Utilities Company (KU), and Citrix

Louisville Gas and Electric Company (LG&E) and Kentucky Utilities Company (KU) regularly receive best-in-class customer-satisfaction ratings. That is significant for utilities that together serve nearly 1.3 million customers, including providing power in all 77 counties in Kentucky and five counties in Virginia, in addition to providing natural gas for customers in Louisville, Kentucky, and 16 surrounding counties. LG&E and KU are part of the PPL Corporation family of companies, and they are headquartered in Louisville.

The Challenge: Perpetuate a paperless workplace and maximize application availability 

In order to empower field employees to access the information they need at any time, LG&E and KU have steadily moved toward mobile-powered workforces and paperless operations. In a power plant, mobile connections can be challenging. Wireless network connections aren’t always available in power plants, and when they are, they often suffer from interference. To combat the unreliable nature of wireless connections, the LG&E and KU development group turned to cellular connectivity and developed several internal-facing mobile applications that employees use on Apple iPad devices. In the early stages of the move to a cellular-based approach, employees were sometimes unable to connect to the mobile applications due to LG&E and KU’s previous loadbalancing solution ineffectively handling traffic. The solution couldn’t consistently deliver the needed capacity and reliability—which meant that employees couldn’t consistently access critical apps and data.

To support more secure, reliable mobile-application access in the field and on employees’ personal devices, in 2012, LG&E and KU deployed Citrix Endpoint Management. Citrix ADC was already deployed to provide remote access to a small, internal virtual-desktop-infrastructure (VDI) environment. The companies also used a different load-balancing solution to support other critical application workloads, such as their existing SAP solution–based customer portal, Microsoft Exchange, and Oracle Financials. The addition of Citrix Endpoint Management, and the pending end-of-life of the existing load-balancing appliance, provided the opportunity for LG&E and KU to consolidate all their load-balancing requirements onto a single vendor platform—a move that could meet application delivery needs and lower overall operational costs.

The Solution: Choose Citrix ADC for one-platform, one-vendor efficiency

LG&E and KU chose Citrix ADC appliances, run on Intel Xeon processors, as their solution. The utilities upgraded their existing Citrix ADC solutions to the multitenant Citrix ADC SDX platform, which has allowed them to service additional applications and isolate virtual instances from a single appliance. With the Citrix ADC SDX solution, LG&E and KU use a single platform for all of their load-balancing needs and help secure access to critical enterprise application workloads and their entire Citrix infrastructure, which includes Citrix Virtual Apps and Desktops and Citrix Endpoint Management.

Field employees securely access applications from their mobile devices using the Citrix Endpoint Management and Citrix ADC SDX solutions. The Citrix ADC SDX appliance ensures the availability of Citrix Endpoint Management mobile-devicemanagement (MDM) servers Serve 1.3 million customers Employ nearly 3,600 people Provide power to 83 counties during high-traffic surges, delivering 100-percent uptime for apps and data. LG&E and KU reduce costs by maintaining a digital “paper” trail that increases accuracy, response times, and productivity by removing the need to manage pieces of paper and the risk of losing those papers.

LG&E and KU can now host qualityassurance (QA) and production environments from the same Citrix ADC appliance, separating them as virtual instances on the multi-tenant Citrix ADC platform, Citrix ADC SDX. And because Citrix ADC appliances are run on Intel Xeon processors, LG&E and KU’s Citrix ADC solution takes advantage of the processor family’s improved encryption, performance, and data availability. Citrix ADC appliances also benefit from Intel Virtualization Technology for Directed I/O (Intel VT-d), which improves performance for input/output (I/O) devices in virtualized environments.

Key Benefits

A paperless model won’t work if digital connections aren’t always available and secure. With its Citrix ADC solution, the LG&E and KU operations team can fully support the LG&E and KU corporate commitment to digital transformation. Citrix ADC appliances can also help the team drive even more paperless processes that help reduce errors, deliver greater time savings, and help maintain and improve compliance. Employees are empowered, and customers are more satisfied, by having consistent service and a faster return to service when outages occur. “We believe doing it electronically instead of on paper is better. And Citrix ADC helps us do it electronically,” says Bill Brumleve, System Administrator at LG&E and KU.

Cost savings and data center consolidation

With the Citrix ADC SDX solution, cost savings come from more than just being paperless. Using the Citrix ADC SDX solution has allowed LG&E and KU to consolidate their data centers with fewer Citrix ADC appliances, which delivers significant cost savings. Consolidating to a single load-balancing vendor has also contributed to lower operational costs, as a result of decreased datacenter complexity and technical debt. The entire operation, with its 1.3 million customers, is now run using four Citrix ADC SDX 14030 appliances housed in two different data-center locations. And those Citrix ADC appliances are run on Intel Xeon processors, which contribute to outstanding performance in virtualized environments and high consolidation ratios.

Improved user experience and IT productivity

Consolidated load balancing with the Citrix ADC solution lets LG&E and KU deliver a better experience for field employees. It also has allowed LG&E and KU to improve field employee and IT productivity. Users can easily and reliably connect, and connections no longer fail as they occasionally had with the previous VPN solution. Users aren’t kept from getting their jobs done, and they don’t have to find time-consuming workarounds either. “Now, users get everything they need in a much easier way. The end user has a much smoother experience than before,” Brumleve says. With the Citrix ADC solution, the LG&E and KU IT team can focus on more strategic initiatives instead of managing application-access issues. “Better integration has helped make management of app delivery easier,” Brumleve says.

With the Intel Xeon processor E5 family powering its Citrix ADC solution, LG&E and KU optimizes performance based on workload demands at the server level. Citrix ADC appliances are optimized to squeeze the maximum capacity and support from Intel architecture and up to 55 MB of L3 cache on the Intel Xeon processor E5 v4 family. This lowers latency and accelerates performance, because it’s much faster for data to move through the L3 cache than through main system memory. By playing off of one another’s strengths, the Intel Xeon processor E5 v4 family and the Citrix ADC solution let Brumleve and his team move more data more quickly through the data center.

High availability and disaster recovery

The Citrix ADC solution’s reliability and high-availability (HA) capabilities keeps users connected and productive in ways they don’t even realize because of the platform’s seamless failover capabilities. And running on the Intel Xeon processor E5 v4 family helps further ensure the Citrix ADC solution’s overall availability because of the processor family’s improved encryption, performance, and data availability. LG&E and KU once experienced a failure while upgrading a virtual-machine host; the upgrade caused their Citrix ADC appliance to fail. However, the appliance automatically failed over to standby, and users didn’t experience a single millisecond of disruption. “We were able to do all of that without the end user knowing a thing. It failed over to its standby and never skipped a beat. We’ve done that several times, and it allows us to do a lot of things without having to cause outages for the user. I’ve been very happy with that. The HA and DR functionality is very near and dear to our hearts,” Brumleve says.

Brumleve and his team use the global server load balancing (GSLB) capability in the Citrix ADC appliance wherever possible to ensure traffic is intelligently distributed between data centers. The team deploys Citrix ADC appliances in each data center to distribute Citrix Endpoint Management traffic. Virtual IP addresses (VIPs) that support GSLB run in each data center, and all LG&E and KU appliances in each data center run as HA pairs. “GSLB makes disaster recovery that much easier,” Brumleve says.

Looking Ahead

In the next few years, LG&E and KU want to consolidate even more onto Citrix ADC SDX appliances by adding SSL VPN functionality with Citrix Gateway to eliminate the need for their current VPN solution to deliver all their applications. LG&E and KU are also looking to upgrade their remaining Citrix ADC MPX platforms to Citrix ADC SDX appliances.

With NetScaler, giving users access is simply checking a box and picking a certificate from a drop-down, and we are done, and it all works. Because of the integration, it isn’t different processes working on different platforms. It works much better. The integration really helps us.
Bill Brumleve
System Administrator
LG&E and KU


  • Energy and Utilities
  • Government and Public Sector

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