In the evolving landscape of network technology, constructing or upgrading your network infrastructure is a monumental task that demands precision, foresight, and a deep understanding of the components that ensure its optimal function. Amidst the myriad decisions and technical considerations, the choice between Network TAPs and SPAN or Mirror Ports for network visibility emerges as a crucial fork in the road. This discussion is not just about hardware; it's about securing the reliability, performance, and security of your network infrastructure. As we delve into the advantages of Network TAPs, our aim is to illuminate the path to achieving comprehensive network visibility, a critical component in today's digitally driven environments.
Crafting your network infrastructure, whether for an enhancement or constructing a new data center, presents intricate challenges. However, selecting Network TAPs as the cornerstone of your visibility strategy should be a straightforward choice, offering a clear advantage over SPAN or Mirror Ports. Modern networks require unfettered visibility through the transfer of all live data, ensuring no downtime for active security measures and zero packet loss for monitoring tools.
Network TAPs have consistently been recognized as the gold standard for network access and visibility. If you're in need of a reminder, consider these essential benefits.
Garland Technology is committed to providing complete network visibility with an extensive range of network test access products (TAPs), including Breakout TAPs, Aggregator and Regeneration TAPs, Bypass TAPs, and virtual TAPs. We cater to all your network infrastructure requirements with our comprehensive selection of physical layer TAP solutions.
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1. Network TAP (Test Access Point): A device that creates a "mirror" copy of the data flowing between network devices, allowing for real-time monitoring and analysis without affecting network performance.
2. SPAN (Switched Port Analyzer) or Mirror Ports: A feature on a network switch that sends a copy of network packets seen on one switch port (or an entire VLAN) to a network monitoring connection on another port.
3. Network Visibility: The ability to monitor and manage the flow of data through a network, ensuring that performance and security standards are met.
4. Bypass TAP: A specific type of Network TAP that can keep the network link up and running even if the inline security appliance fails or needs to be taken offline for updates.
5. Breakout TAP: A device that duplicates incoming network traffic and sends copies to multiple monitoring tools simultaneously without packet loss.
6. Aggregator TAP: Combines and forwards packets from multiple network ports to a single monitoring port, allowing the analysis of traffic from multiple network segments.
7. Regeneration TAP: Similar to an aggregator TAP, it duplicates network traffic from a single input to multiple outputs, enabling simultaneous monitoring by multiple devices.
8. Virtual TAPs: Software-based tools that capture data traffic in virtualized environments, such as cloud infrastructures or virtual machines, for monitoring and analysis.
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.