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Port mirroring on a Cisco Systems switch is generally referred to as Switched Port Analyzer (SPAN) or Remote Switched Port Analyzer (RSPAN). Other vendors have different names for it, such as Roving Analysis Port (RAP) on 3Com switches. Network engineers or administrators use port mirroring to analyze and debug data or diagnose errors on a ...
The network data that a packet capture appliance captures depends on where and how the appliance is installed on a network. There are two options for deploying packet capture appliances on a network. One option is to connect the appliance to the SPAN port (port mirroring) on a network switch or router.
A network tap is a system that monitors events on a local network. A tap is typically a dedicated hardware device, which provides a way to access the data flowing across a computer network. The network tap has (at least) three ports: an A port, a B port, and a monitor port. A tap inserted between A and B passes all traffic (send and receive ...
On modern networks, traffic can be captured using a network switch using port mirroring, which mirrors all packets that pass through designated ports of the switch to another port, if the switch supports port mirroring. A network tap is an even more reliable solution than to use a monitoring port since taps are less likely to drop packets ...
Port mirroring is how this problem is addressed in switched networks: In addition to the usual behavior of forwarding frames only to ports through which they might reach their addressees, the switch forwards frames received through a given monitored port to a designated monitoring port, allowing analysis of traffic that would otherwise not be ...
Using port mirroring (sometimes called Span Port) is a very common way, as well as physically inserting a network tap which duplicates and sends the data stream to an analyzer tool for inspection. Deep Packet Inspection (and filtering) enables advanced network management , user service, and security functions as well as internet data mining ...
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Layer 1 switching enables mirroring and software-defined port routing with port-to-port latency starting from 4ns, depending on physical distance. The E and L variants allow running custom FPGA applications directly on the switch with a port-to-FPGA latency as low as 3ns. This series comes from the original Metamako product line acquired by ...
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