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Where Should I Place My TAP?

Two common methods to copy traffic to your monitoring or security tools is a Span port or network tap. Span can be convenient for quick troubleshooting, remote locations or when you do not have access to the physical infrastructure. The risk of using a span port is that

  • It can be over subscribed, and the lowest priority when it comes to forwarding all the packets to the intended device.
  • Using a SPAN port is processor-intensive and can have a negative performance on the switch itself.

To avoid this we can use a network TAP which is a simple device that connects directly to the cabling infrastructure to split or copy packets for monitoring purposes such as security or packet capture devices. 

So where do I deploy a tap? A quick answer to this is anywhere you need 100% of the data all the time from L1 to L7. The diagram below is also a useful reference guide.

Thank you to ProfiTap for the article. 

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Wednesday, 13 November 2019

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