The growth in size of data centers – from bandwidth to traffic and beyond – is no secret. However, fewer stakeholders in network management are leveraging application performance monitoring (APM) in consideration of these technological advances.
Your monitoring tools and applications are costly investments, so they must provide you with the troubleshooting and analytical value you expect. But, network performance monitoring tools are incapable of performing their fixes necessary to keep your applications engaged with your network. APM is the means by which you ensure the full function of your applications – and, subsequently, your network visibility and security.
Monitoring, as a whole, has become much more difficult now that businesses have increased the amount of network traffic they need to monitor. Superior, comprehensive network management is a function of having real-time awareness of what’s happening on the network. You must be capable of monitoring, analyzing, and reporting physical, virtual, or cloud-based activity to quickly identify and fix problems.
So, how do you manage such a complex collection of tasks?
First and foremost, you must understand the relationship between applications or tools and your network overall. When you do this, you are better equipped to manage and design your network.
APM provides visibility into your application performance by monitoring your user experience, tracing code-level activity and providing big-data analytics. Sound APM solutions warn you of application issues before your network and business bear the brunt of such problems. With greater visibility and proactivity, you significantly cut down on troubleshooting.
In fact, the right APM solution troubleshoots application and network issues 90% faster than traditional troubleshooting methods. With application performance monitoring, troubleshooting an error by recreating it is completely unnecessary. As opposed to network performance monitoring, APM solutions wade through the weeds of your data to quickly pinpoint the root cause and location of applications issues.
The best plan of attack is always the one that starts with the overall goal and breaks it down into smaller initiatives that roll up into the main plan. With complete network visibility, absolute security, and overall profitability at the top of your mind, you must consider how each faction of your network affects these goals and requirements.
Given the importance of your group of applications, APM is critical to your end-goal. If you don’t plan to manage them in a way that ensures they are always active and doing their jobs, you can’t have confidence in your network’s security or your visibility into it. With new environments and faster speeds, application – not network – performance management is your key to ensuring uptime and profitability.
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If the inline security tool goes off-line, the TAP will bypass the tool and automatically keep the link flowing. The Bypass TAP does this by sending heartbeat packets to the inline security tool. As long as the inline security tool is on-line, the heartbeat packets will be returned to the TAP, and the link traffic will continue to flow through the inline security tool.
If the heartbeat packets are not returned to the TAP (indicating that the inline security tool has gone off-line), the TAP will automatically 'bypass' the inline security tool and keep the link traffic flowing. The TAP also removes the heartbeat packets before sending the network traffic back onto the critical link.
While the TAP is in bypass mode, it continues to send heartbeat packets out to the inline security tool so that once the tool is back on-line, it will begin returning the heartbeat packets back to the TAP indicating that the tool is ready to go back to work. The TAP will then direct the network traffic back through the inline security tool along with the heartbeat packets placing the tool back inline.
Some of you may have noticed a flaw in the logic behind this solution! You say, “What if the TAP should fail because it is also in-line? Then the link will also fail!” The TAP would now be considered a point of failure. That is a good catch – but in our blog on Bypass vs. Failsafe, I explained that if a TAP were to fail or lose power, it must provide failsafe protection to the link it is attached to. So our network TAP will go into Failsafe mode keeping the link flowing.
Single point of failure: a risk to an IT network if one part of the system brings down a larger part of the entire system.
Heartbeat packet: a soft detection technology that monitors the health of inline appliances. Read the heartbeat packet blog here.
Critical link: the connection between two or more network devices or appliances that if the connection fails then the network is disrupted.