My main use case for F5 BIG-IP Virtual Edition is for LTM and GTM. For LTM, I use it for load balancing, and GTM is for global load balancing, which functions as intelligent DNS.
Let's suppose we have one application abc.com. We create an alias on abc.gslb.com and forward that traffic to a CNAME, which in turn forwards the traffic to the GTM. The GTM does the load balancing between the data centers. Sometimes it is active-active, and sometimes it is an active-standby setup similar to DCDR, depending on the requirement and application team requests. After that, if there is a disaster at some data center, such as power issues, the standby data center will serve that purpose. This really increases our availability and performance of the application, and we are receiving fewer complaints, almost none.
My use case is known mainly for the GTM and LTM.
The best feature of F5 BIG-IP Virtual Edition is SSL offloading. There are different methods to deploy an application at Layer 2 and Layer 3 setup. Based on the requirement, we do that, so it is a complete ADC application delivery control, providing all the solutions that the application team needs.
A particular feature I need in F5 BIG-IP Virtual Edition is iRule redirection. If they need SSL offloading or pass-through, or bridging, all kinds of solutions are available. Based on the requirement, we can fulfill those needs, even with GTM topology, which can be active-active or active-standby. In load balancing, there are different methods, so ratios and all can be easily configured as per the requirement. It works as a full proxy architecture, so it has the full capability to understand the request and response.
Another feature of F5 BIG-IP Virtual Edition that stands out to me is that it is template-based. For rapid deployment, if we need to create hundreds or thousands of VIPs at the same time, we can use iApp and scripting to do that easily. These are the major features, and for automation, we can easily manage that through F5 BIG-IP Virtual Edition.
F5 BIG-IP Virtual Edition has positively impacted my organization. Without LTM, there is a single point of failure. Since we have LTM, we are protecting our application. Previously we faced DoS attacks, and through iRule, we blocked those IPs. This iRule is a great feature, and now with our LTM, we are not exposing our actual server on the internet. Instead, we are exposing our VIP IP, providing security and scalability. We have the flexibility to add or remove servers as needed.
Regarding specific metrics or outcomes, earlier if one of the servers went down, there was a significant impact. Since F5 BIG-IP Virtual Edition is a smart device, it can monitor the services and applications irrespective of the port, checking whether the application is available or not. It is significantly reducing downtime. If any server is causing an issue, such as if the service is running but the internal application has crashed, F5 BIG-IP Virtual Edition will mark that server as down and will not send traffic to it. This increases performance and availability, building trust with clients, which directly translates into revenue. If there is reputational loss, we can lose money as well for the organization. We send our solutions to other vendors and recommend F5 BIG-IP Virtual Edition as a great product that everyone should need.
Improvements for F5 BIG-IP Virtual Edition should include training for newcomers. If they are not aware, it can be beneficial for them to learn. In authentication, there is currently a single method to add a single IP. Adding a fallback IP would also help. I am not sure if that feature will be included in the upcoming version, but I am still using an older version where that feature is not available.
I have been using F5 BIG-IP Virtual Edition for approximately five years, and I have been working on F5 BIG-IP Virtual Edition LTM virtual editions.
My advice to others looking into using F5 BIG-IP Virtual Edition is to definitely go with the full potential of F5 BIG-IP Virtual Edition LTM. It is a great product that will make your life easier and reduce costs. They provide great support, and the TAC team is there whenever needed. You can log a case and they will help.