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* '''Bridge mode''': In Bridge mode A.K.A. In-Line mode, all received packets will be transmitted between corresponding port pairs (e.g. 1+2, 3+4 on Allegro 500) so that the Allegro can be placed | * '''Bridge mode''': In Bridge mode A.K.A. In-Line mode, all received packets will be transmitted between corresponding port pairs (e.g. 1+2, 3+4 on Allegro 500) so that the Allegro can be placed in-line between any network component.<br/ >The device will operate transparent and will not modify network traffic in any way. The additional latency will be typically around or less than 1 millisecond.<br>In Bridge mode it is also possible to process network traffic from a mirror port or Tap. However, "only" half of the total available ports on each respective Allegro Network Multimeter model can be used to operate in this way. For example on a 4-port Allegro model 500, you can conveniently leave the unit in bridge mode and connect up to two mirror ports on interfaces 1 and 3 respectively. Aforementioned interfaces are physically separated and not an (in-line) interface pair.<br />Always avoid connecting mirror port traffic on an Allegro Network Multimeter interface pair (e.g. 1+2, 3+4 on Allegro 500), as this will result in TX traffic in the direction of a mirror port which if highly undesirable.<br />[[File:Inline mode.jpg|800px|Allegro in brigde mode (in-line)]] | ||
* '''Sink mode''': In Sink mode, the Allegro will operate "receive only".<br />Packets are not forwarded and there's no bi-directional traffic on any of the monitoring ports. This operation mode allows for installation at a Mirror port of a Switch or when using a network Tap to access the network traffic.<br />[[File:Sink mode1.jpg|800px|Allegro in Sink mode on Mirror port or Tap]] | * '''Sink mode''': In Sink mode, the Allegro will operate "receive only".<br />Packets are not forwarded and there's no bi-directional traffic on any of the monitoring ports. This operation mode allows for installation at a Mirror port of a Switch or when using a network Tap to access the network traffic.<br />[[File:Sink mode1.jpg|800px|Allegro in Sink mode on Mirror port or Tap]] | ||
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* Ethernet packets encapsulated in GRE or GRE+ERSPAN and targeted for the configured IP address.<br />The system will process the packets as if only the inner encapsulated packet is seen and any traffic captures will only contain the encapsulated packet. | * Ethernet packets encapsulated in GRE or GRE+ERSPAN and targeted for the configured IP address.<br />The system will process the packets as if only the inner encapsulated packet is seen and any traffic captures will only contain the encapsulated packet. | ||
* UDP packets to specific port (packets will be | * UDP packets to specific port (packets will be analyzed as is). | ||
An interface with endpoint mode enabled will respond to ARP requests and to ICMP echo requests so it is possible to use ping to verify that the interface is reachable under the configured IP address. | An interface with endpoint mode enabled will respond to ARP requests and to ICMP echo requests so it is possible to use ping to verify that the interface is reachable under the configured IP address. | ||
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This reserved amount of memory (RAM) is configurable and will not be available for the In-Memory database, thus the history of stored statistics in the dashboard becomes a little shorter. If this is not desired, it is possible to disable the Webshark support. | This reserved amount of memory (RAM) is configurable and will not be available for the In-Memory database, thus the history of stored statistics in the dashboard becomes a little shorter. If this is not desired, it is possible to disable the Webshark support. | ||
Multiple parallel sessions/instances of Webshark previewing within one Allegro Network Multimeter is possible. The number of simultaneous Webshark instances and max. preview | Multiple parallel sessions/instances of Webshark previewing within one Allegro Network Multimeter is possible. The number of simultaneous Webshark instances and max. preview file size (e.g. 5MB) are configurable but may vary depending on Allegro model and installed RAM. | ||
Changing Webshark parameters requires a restart of the processing. | Changing Webshark parameters requires a restart of the processing. | ||