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Introduction (view source)

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The Allegro Network Multimeter is a real-time network measurement tool to identify network problems, performance bottlenecks, and to measure network quality parameters. It can be used for network troubleshooting, performance measurement, performance monitoring and other use cases. The appliance is easy to install and provides a modern web-based interface to analyze multiple network traffic parameters from all Layers of the network stack.
he Allegro Network Multimeter is a real-time network measurement tool to identify network problems, performance bottlenecks, and to measure network quality parameters. It can be used for network troubleshooting, performance measurement, performance monitoring and other use cases. The appliance is easy to install and provides a modern web-based interface to analyze multiple network traffic parameters from all Layers of the network stack.


The appliance can be placed inline in gigabit networks, or running on the Mirror Port of a router. It will measure the following network parameters:
The appliance can be placed inline in gigabit networks, or running on the Mirror Port of a router. It will measure the following network parameters:
 
* '''Layer 2''' statistics & analysis MAC, QoS, ARP, VLAN, STP, MPLS, LLDP, PPPoE, packet size distribution and Micro burst analysis.
* Layer 2 MAC analysis: Throughput, assigned IP addresses, communication peers, and more.
* '''Layer 3''' statistics & analysis Individual IP, QoS, DHCP, DNS, Netbios, ICMP, Multicast and Geolocation.
* Layer 3 IP analysis: Throughput, used IP addresses, communication peers, connection information, DPI protocols used, Geolocation (country information).
* '''Layer 4''' statistics & analysis TCP, IPSec, individual connections and L4 server ports.
* Layer 7 analysis: passive DNS name resolving, passive DHCP information, DPI protocols.
* '''Layer 7''' statistics & analysis SSL, HTTP, SIP, RTP, SMB, Profinet, OPC-UA, L7 app. protocols, NTP, PTP and custom response time analysis.
 
 
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All information is available in Real-Time including history graphs of the global traffic, traffic per MAC address, per IP address, or even per protocol. Additionally, graphs can be clicked to zoom into a specific timeframe and see measurement results for only that specific time interval.


All information is available in real-time including history graphs of the traffic for the complete device, per MAC address, per IP address, or even per protocol. Additionally, graphs can be clicked to zoom into a specific timeframe and see measurement results for only that time window.
=== Data processing and storage ===
 
The Allegro Network Multimeter consists of two separate data planes, fascilitating two modi operandi.
The device uses only In-memory storage and does not permanently store any network information, allowing it to be used in restricted areas where no data is allowed to be stored or removed. One exception, if configured, is the packet ring buffer (see [[Storage]]). Packets captured to the packet ring buffer are stored permanently until the ring buffer is deleted.
 
The Allegro Network Multimeter provides open interfaces to extract all information visible in the web interface for further processing.


Also, network traffic can be captured in real-time as HTTP downloads, including filtering to selected IP addresses, protocols, or MAC address.
1. Allegro Network Multimeter uniquely utilizes Random Access Memory (RAM) to construct its very fast In-Memory Database. Measurement data and statistics shown throughout the web-interface/dashboard, are stored in, and retrieved from RAM. This allows for the Allegro Network Multimeter to be used in restricted and or GDPR/AVG sensitive areas, where it is not allowed to store or remove data.


2. Allegro Network Multimeter facilitates the use of a so called Packet Ring Buffer. The packet ring buffer (see [[Storage]]) is a HDD/SSD storage device where packet data can be stored "permanently". This allows a Allegro Network Multimeter user to retroactively extract packets of interest from the web-interface, in the form of a pcap, for in depth analysis with Allegro's built in Webshark or Wireshark.
=== Dynamic memory utilization ===
=== Dynamic memory utilization ===


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